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 </pre><pre class="rust"><code><span class="doccomment">//! Filtering for log records.
 //!
 //! This module contains the log filtering used by `env_logger` to match records.
 //! You can use the `Filter` type in your own logger implementation to use the same
 //! filter parsing and matching as `env_logger`. For more details about the format
 //! for directive strings see [Enabling Logging].
 //!
 //! ## Using `env_logger` in your own logger
 //!
 //! You can use `env_logger`&#39;s filtering functionality with your own logger.
 //! Call [`Builder::parse`] to parse directives from a string when constructing
 //! your logger. Call [`Filter::matches`] to check whether a record should be
 //! logged based on the parsed filters when log records are received.
 //!
 //! ```
 //! extern crate log;
 //! extern crate env_logger;
 //! use env_logger::filter::Filter;
 //! use log::{Log, Metadata, Record};
 //!
 //! struct MyLogger {
 //!     filter: Filter
 //! }
 //!
 //! impl MyLogger {
 //!     fn new() -&gt; MyLogger {
 //!         use env_logger::filter::Builder;
 //!         let mut builder = Builder::new();
 //!
 //!         // Parse a directives string from an environment variable
 //!         if let Ok(ref filter) = std::env::var(&quot;MY_LOG_LEVEL&quot;) {
 //!            builder.parse(filter);
 //!         }
 //!
 //!         MyLogger {
 //!             filter: builder.build()
 //!         }
 //!     }
 //! }
 //!
 //! impl Log for MyLogger {
 //!     fn enabled(&amp;self, metadata: &amp;Metadata) -&gt; bool {
 //!         self.filter.enabled(metadata)
 //!     }
 //!
 //!     fn log(&amp;self, record: &amp;Record) {
 //!         // Check if the record is matched by the filter
 //!         if self.filter.matches(record) {
 //!             println!(&quot;{:?}&quot;, record);
 //!         }
 //!     }
 //!
 //!     fn flush(&amp;self) {}
 //! }
 //! ```
 //!
 //! [Enabling Logging]: ../index.html#enabling-logging
 //! [`Builder::parse`]: struct.Builder.html#method.parse
 //! [`Filter::matches`]: struct.Filter.html#method.matches

 </span><span class="kw">use </span>log::{Level, LevelFilter, Metadata, Record};
 <span class="kw">use </span>std::collections::HashMap;
 <span class="kw">use </span>std::env;
 <span class="kw">use </span>std::fmt;
 <span class="kw">use </span>std::mem;

 <span class="attribute">#[cfg(feature = <span class="string">&quot;regex&quot;</span>)]
 #[path = <span class="string">&quot;regex.rs&quot;</span>]
 </span><span class="kw">mod </span>inner;

 <span class="attribute">#[cfg(not(feature = <span class="string">&quot;regex&quot;</span>))]
 #[path = <span class="string">&quot;string.rs&quot;</span>]
 </span><span class="kw">mod </span>inner;

 <span class="doccomment">/// A log filter.
 ///
 /// This struct can be used to determine whether or not a log record
 /// should be written to the output.
 /// Use the [`Builder`] type to parse and construct a `Filter`.
 ///
 /// [`Builder`]: struct.Builder.html
 </span><span class="kw">pub struct </span>Filter {
     directives: Vec&lt;Directive&gt;,
     filter: <span class="prelude-ty">Option</span>&lt;inner::Filter&gt;,
 }

 <span class="doccomment">/// A builder for a log filter.
 ///
 /// It can be used to parse a set of directives from a string before building
 /// a [`Filter`] instance.
 ///
 /// ## Example
 ///
 /// ```
 /// # #[macro_use] extern crate log;
 /// # use std::env;
 /// use env_logger::filter::Builder;
 ///
 /// let mut builder = Builder::new();
 ///
 /// // Parse a logging filter from an environment variable.
 /// if let Ok(rust_log) = env::var(&quot;RUST_LOG&quot;) {
 ///     builder.parse(&amp;rust_log);
 /// }
 ///
 /// let filter = builder.build();
 /// ```
 ///
 /// [`Filter`]: struct.Filter.html
 </span><span class="kw">pub struct </span>Builder {
     directives: HashMap&lt;<span class="prelude-ty">Option</span>&lt;String&gt;, LevelFilter&gt;,
     filter: <span class="prelude-ty">Option</span>&lt;inner::Filter&gt;,
     built: bool,
 }

 <span class="attribute">#[derive(Debug)]
 </span><span class="kw">struct </span>Directive {
     name: <span class="prelude-ty">Option</span>&lt;String&gt;,
     level: LevelFilter,
 }

 <span class="kw">impl </span>Filter {
     <span class="doccomment">/// Returns the maximum `LevelFilter` that this filter instance is
     /// configured to output.
     ///
     /// # Example
     ///
     /// ```rust
     /// use log::LevelFilter;
     /// use env_logger::filter::Builder;
     ///
     /// let mut builder = Builder::new();
     /// builder.filter(Some(&quot;module1&quot;), LevelFilter::Info);
     /// builder.filter(Some(&quot;module2&quot;), LevelFilter::Error);
     ///
     /// let filter = builder.build();
     /// assert_eq!(filter.filter(), LevelFilter::Info);
     /// ```
     </span><span class="kw">pub fn </span>filter(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; LevelFilter {
         <span class="self">self</span>.directives
             .iter()
             .map(|d| d.level)
             .max()
             .unwrap_or(LevelFilter::Off)
     }

     <span class="doccomment">/// Checks if this record matches the configured filter.
     </span><span class="kw">pub fn </span>matches(<span class="kw-2">&amp;</span><span class="self">self</span>, record: <span class="kw-2">&amp;</span>Record) -&gt; bool {
         <span class="kw">if </span>!<span class="self">self</span>.enabled(record.metadata()) {
             <span class="kw">return </span><span class="bool-val">false</span>;
         }

         <span class="kw">if let </span><span class="prelude-val">Some</span>(filter) = <span class="self">self</span>.filter.as_ref() {
             <span class="kw">if </span>!filter.is_match(<span class="kw-2">&amp;</span>record.args().to_string()) {
                 <span class="kw">return </span><span class="bool-val">false</span>;
             }
         }

         <span class="bool-val">true
     </span>}

     <span class="doccomment">/// Determines if a log message with the specified metadata would be logged.
     </span><span class="kw">pub fn </span>enabled(<span class="kw-2">&amp;</span><span class="self">self</span>, metadata: <span class="kw-2">&amp;</span>Metadata) -&gt; bool {
         <span class="kw">let </span>level = metadata.level();
         <span class="kw">let </span>target = metadata.target();

         enabled(<span class="kw-2">&amp;</span><span class="self">self</span>.directives, level, target)
     }
 }

 <span class="kw">impl </span>Builder {
     <span class="doccomment">/// Initializes the filter builder with defaults.
     </span><span class="kw">pub fn </span>new() -&gt; Builder {
         Builder {
             directives: HashMap::new(),
             filter: <span class="prelude-val">None</span>,
             built: <span class="bool-val">false</span>,
         }
     }

     <span class="doccomment">/// Initializes the filter builder from an environment.
     </span><span class="kw">pub fn </span>from_env(env: <span class="kw-2">&amp;</span>str) -&gt; Builder {
         <span class="kw">let </span><span class="kw-2">mut </span>builder = Builder::new();

         <span class="kw">if let </span><span class="prelude-val">Ok</span>(s) = env::var(env) {
             builder.parse(<span class="kw-2">&amp;</span>s);
         }

         builder
     }

     <span class="doccomment">/// Adds a directive to the filter for a specific module.
     </span><span class="kw">pub fn </span>filter_module(<span class="kw-2">&amp;mut </span><span class="self">self</span>, module: <span class="kw-2">&amp;</span>str, level: LevelFilter) -&gt; <span class="kw-2">&amp;mut </span><span class="self">Self </span>{
         <span class="self">self</span>.filter(<span class="prelude-val">Some</span>(module), level)
     }

     <span class="doccomment">/// Adds a directive to the filter for all modules.
     </span><span class="kw">pub fn </span>filter_level(<span class="kw-2">&amp;mut </span><span class="self">self</span>, level: LevelFilter) -&gt; <span class="kw-2">&amp;mut </span><span class="self">Self </span>{
         <span class="self">self</span>.filter(<span class="prelude-val">None</span>, level)
     }

     <span class="doccomment">/// Adds a directive to the filter.
     ///
     /// The given module (if any) will log at most the specified level provided.
     /// If no module is provided then the filter will apply to all log messages.
     </span><span class="kw">pub fn </span>filter(<span class="kw-2">&amp;mut </span><span class="self">self</span>, module: <span class="prelude-ty">Option</span>&lt;<span class="kw-2">&amp;</span>str&gt;, level: LevelFilter) -&gt; <span class="kw-2">&amp;mut </span><span class="self">Self </span>{
         <span class="self">self</span>.directives.insert(module.map(|s| s.to_string()), level);
         <span class="self">self
     </span>}

     <span class="doccomment">/// Parses the directives string.
     ///
     /// See the [Enabling Logging] section for more details.
     ///
     /// [Enabling Logging]: ../index.html#enabling-logging
     </span><span class="kw">pub fn </span>parse(<span class="kw-2">&amp;mut </span><span class="self">self</span>, filters: <span class="kw-2">&amp;</span>str) -&gt; <span class="kw-2">&amp;mut </span><span class="self">Self </span>{
         <span class="kw">let </span>(directives, filter) = parse_spec(filters);

         <span class="self">self</span>.filter = filter;

         <span class="kw">for </span>directive <span class="kw">in </span>directives {
             <span class="self">self</span>.directives.insert(directive.name, directive.level);
         }
         <span class="self">self
     </span>}

     <span class="doccomment">/// Build a log filter.
     </span><span class="kw">pub fn </span>build(<span class="kw-2">&amp;mut </span><span class="self">self</span>) -&gt; Filter {
         <span class="macro">assert!</span>(!<span class="self">self</span>.built, <span class="string">&quot;attempt to re-use consumed builder&quot;</span>);
         <span class="self">self</span>.built = <span class="bool-val">true</span>;

         <span class="kw">let </span><span class="kw-2">mut </span>directives = Vec::new();
         <span class="kw">if </span><span class="self">self</span>.directives.is_empty() {
             <span class="comment">// Adds the default filter if none exist
             </span>directives.push(Directive {
                 name: <span class="prelude-val">None</span>,
                 level: LevelFilter::Error,
             });
         } <span class="kw">else </span>{
             <span class="comment">// Consume map of directives.
             </span><span class="kw">let </span>directives_map = mem::take(<span class="kw-2">&amp;mut </span><span class="self">self</span>.directives);
             directives = directives_map
                 .into_iter()
                 .map(|(name, level)| Directive { name, level })
                 .collect();
             <span class="comment">// Sort the directives by length of their name, this allows a
             // little more efficient lookup at runtime.
             </span>directives.sort_by(|a, b| {
                 <span class="kw">let </span>alen = a.name.as_ref().map(|a| a.len()).unwrap_or(<span class="number">0</span>);
                 <span class="kw">let </span>blen = b.name.as_ref().map(|b| b.len()).unwrap_or(<span class="number">0</span>);
                 alen.cmp(<span class="kw-2">&amp;</span>blen)
             });
         }

         Filter {
             directives: mem::take(<span class="kw-2">&amp;mut </span>directives),
             filter: mem::replace(<span class="kw-2">&amp;mut </span><span class="self">self</span>.filter, <span class="prelude-val">None</span>),
         }
     }
 }

 <span class="kw">impl </span>Default <span class="kw">for </span>Builder {
     <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
         Builder::new()
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Filter {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         f.debug_struct(<span class="string">&quot;Filter&quot;</span>)
             .field(<span class="string">&quot;filter&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.filter)
             .field(<span class="string">&quot;directives&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.directives)
             .finish()
     }
 }

 <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Builder {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
         <span class="kw">if </span><span class="self">self</span>.built {
             f.debug_struct(<span class="string">&quot;Filter&quot;</span>).field(<span class="string">&quot;built&quot;</span>, <span class="kw-2">&amp;</span><span class="bool-val">true</span>).finish()
         } <span class="kw">else </span>{
             f.debug_struct(<span class="string">&quot;Filter&quot;</span>)
                 .field(<span class="string">&quot;filter&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.filter)
                 .field(<span class="string">&quot;directives&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.directives)
                 .finish()
         }
     }
 }

 <span class="doccomment">/// Parse a logging specification string (e.g: &quot;crate1,crate2::mod3,crate3::x=error/foo&quot;)
 /// and return a vector with log directives.
 </span><span class="kw">fn </span>parse_spec(spec: <span class="kw-2">&amp;</span>str) -&gt; (Vec&lt;Directive&gt;, <span class="prelude-ty">Option</span>&lt;inner::Filter&gt;) {
     <span class="kw">let </span><span class="kw-2">mut </span>dirs = Vec::new();

     <span class="kw">let </span><span class="kw-2">mut </span>parts = spec.split(<span class="string">&#39;/&#39;</span>);
     <span class="kw">let </span>mods = parts.next();
     <span class="kw">let </span>filter = parts.next();
     <span class="kw">if </span>parts.next().is_some() {
         <span class="macro">eprintln!</span>(
             <span class="string">&quot;warning: invalid logging spec &#39;{}&#39;, \
              ignoring it (too many &#39;/&#39;s)&quot;</span>,
             spec
         );
         <span class="kw">return </span>(dirs, <span class="prelude-val">None</span>);
     }
     <span class="kw">if let </span><span class="prelude-val">Some</span>(m) = mods {
         <span class="kw">for </span>s <span class="kw">in </span>m.split(<span class="string">&#39;,&#39;</span>).map(|ss| ss.trim()) {
             <span class="kw">if </span>s.is_empty() {
                 <span class="kw">continue</span>;
             }
             <span class="kw">let </span><span class="kw-2">mut </span>parts = s.split(<span class="string">&#39;=&#39;</span>);
             <span class="kw">let </span>(log_level, name) =
                 <span class="kw">match </span>(parts.next(), parts.next().map(|s| s.trim()), parts.next()) {
                     (<span class="prelude-val">Some</span>(part0), <span class="prelude-val">None</span>, <span class="prelude-val">None</span>) =&gt; {
                         <span class="comment">// if the single argument is a log-level string or number,
                         // treat that as a global fallback
                         </span><span class="kw">match </span>part0.parse() {
                             <span class="prelude-val">Ok</span>(num) =&gt; (num, <span class="prelude-val">None</span>),
                             <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; (LevelFilter::max(), <span class="prelude-val">Some</span>(part0)),
                         }
                     }
                     (<span class="prelude-val">Some</span>(part0), <span class="prelude-val">Some</span>(<span class="string">&quot;&quot;</span>), <span class="prelude-val">None</span>) =&gt; (LevelFilter::max(), <span class="prelude-val">Some</span>(part0)),
                     (<span class="prelude-val">Some</span>(part0), <span class="prelude-val">Some</span>(part1), <span class="prelude-val">None</span>) =&gt; <span class="kw">match </span>part1.parse() {
                         <span class="prelude-val">Ok</span>(num) =&gt; (num, <span class="prelude-val">Some</span>(part0)),
                         <span class="kw">_ </span>=&gt; {
                             <span class="macro">eprintln!</span>(
                                 <span class="string">&quot;warning: invalid logging spec &#39;{}&#39;, \
                                  ignoring it&quot;</span>,
                                 part1
                             );
                             <span class="kw">continue</span>;
                         }
                     },
                     <span class="kw">_ </span>=&gt; {
                         <span class="macro">eprintln!</span>(
                             <span class="string">&quot;warning: invalid logging spec &#39;{}&#39;, \
                              ignoring it&quot;</span>,
                             s
                         );
                         <span class="kw">continue</span>;
                     }
                 };
             dirs.push(Directive {
                 name: name.map(|s| s.to_string()),
                 level: log_level,
             });
         }
     }

     <span class="kw">let </span>filter = filter.and_then(|filter| <span class="kw">match </span>inner::Filter::new(filter) {
         <span class="prelude-val">Ok</span>(re) =&gt; <span class="prelude-val">Some</span>(re),
         <span class="prelude-val">Err</span>(e) =&gt; {
             <span class="macro">eprintln!</span>(<span class="string">&quot;warning: invalid regex filter - {}&quot;</span>, e);
             <span class="prelude-val">None
         </span>}
     });

     (dirs, filter)
 }

 <span class="comment">// Check whether a level and target are enabled by the set of directives.
 </span><span class="kw">fn </span>enabled(directives: <span class="kw-2">&amp;</span>[Directive], level: Level, target: <span class="kw-2">&amp;</span>str) -&gt; bool {
     <span class="comment">// Search for the longest match, the vector is assumed to be pre-sorted.
     </span><span class="kw">for </span>directive <span class="kw">in </span>directives.iter().rev() {
         <span class="kw">match </span>directive.name {
             <span class="prelude-val">Some</span>(<span class="kw-2">ref </span>name) <span class="kw">if </span>!target.starts_with(<span class="kw-2">&amp;**</span>name) =&gt; {}
             <span class="prelude-val">Some</span>(..) | <span class="prelude-val">None </span>=&gt; <span class="kw">return </span>level &lt;= directive.level,
         }
     }
     <span class="bool-val">false
 </span>}

 <span class="attribute">#[cfg(test)]
 </span><span class="kw">mod </span>tests {
     <span class="kw">use </span>log::{Level, LevelFilter};

     <span class="kw">use super</span>::{enabled, parse_spec, Builder, Directive, Filter};

     <span class="kw">fn </span>make_logger_filter(dirs: Vec&lt;Directive&gt;) -&gt; Filter {
         <span class="kw">let </span><span class="kw-2">mut </span>logger = Builder::new().build();
         logger.directives = dirs;
         logger
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>filter_info() {
         <span class="kw">let </span>logger = Builder::new().filter(<span class="prelude-val">None</span>, LevelFilter::Info).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate1&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate1&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>filter_beginning_longest_match() {
         <span class="kw">let </span>logger = Builder::new()
             .filter(<span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>), LevelFilter::Info)
             .filter(<span class="prelude-val">Some</span>(<span class="string">&quot;crate2::mod&quot;</span>), LevelFilter::Debug)
             .filter(<span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>), LevelFilter::Warn)
             .build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate2::mod1&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate2&quot;</span>));
     }

     <span class="comment">// Some of our tests are only correct or complete when they cover the full
     // universe of variants for log::Level. In the unlikely event that a new
     // variant is added in the future, this test will detect the scenario and
     // alert us to the need to review and update the tests. In such a
     // situation, this test will fail to compile, and the error message will
     // look something like this:
     //
     //     error[E0004]: non-exhaustive patterns: `NewVariant` not covered
     //        --&gt; src/filter/mod.rs:413:15
     //         |
     //     413 |         match level_universe {
     //         |               ^^^^^^^^^^^^^^ pattern `NewVariant` not covered
     </span><span class="attribute">#[test]
     </span><span class="kw">fn </span>ensure_tests_cover_level_universe() {
         <span class="kw">let </span>level_universe: Level = Level::Trace; <span class="comment">// use of trace variant is arbitrary
         </span><span class="kw">match </span>level_universe {
             Level::Error | Level::Warn | Level::Info | Level::Debug | Level::Trace =&gt; (),
         }
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;info,crate1::mod1=warn&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;crate1::mod1&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate2::mod2&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_off_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;off&quot;</span>).build();
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_off_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;OFF&quot;</span>).build();
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_error_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;error&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_error_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;ERROR&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_warn_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;warn&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_warn_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;WARN&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_info_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;info&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_info_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;INFO&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_debug_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;debug&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_debug_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;DEBUG&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_trace_lc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;trace&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_trace_uc() {
         <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;TRACE&quot;</span>).build();
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
     }

     <span class="comment">// In practice, the desired log level is typically specified by a token
     // that is either all lowercase (e.g., &#39;trace&#39;) or all uppercase (.e.g,
     // &#39;TRACE&#39;), but this tests serves as a reminder that
     // log::Level::from_str() ignores all case variants.
     </span><span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_default_bare_level_debug_mixed() {
         {
             <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;Debug&quot;</span>).build();
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
         }
         {
             <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;debuG&quot;</span>).build();
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
         }
         {
             <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;deBug&quot;</span>).build();
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
         }
         {
             <span class="kw">let </span>logger = Builder::new().parse(<span class="string">&quot;DeBuG&quot;</span>).build(); <span class="comment">// LaTeX flavor!
             </span><span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;&quot;</span>));
             <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Trace, <span class="string">&quot;&quot;</span>));
         }
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>match_full_path() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()),
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Warn,
             },
         ]);
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;crate1::mod1&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate1::mod1&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate2&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate2&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>no_match() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()),
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Warn,
             },
         ]);
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;crate3&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>match_beginning() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()),
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Warn,
             },
         ]);
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate2::mod1&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>match_beginning_longest_match() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()),
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate2::mod&quot;</span>.to_string()),
                 level: LevelFilter::Debug,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Warn,
             },
         ]);
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate2::mod1&quot;</span>));
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Debug, <span class="string">&quot;crate2&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>match_default() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">None</span>,
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Warn,
             },
         ]);
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Warn, <span class="string">&quot;crate1::mod1&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate2::mod2&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>zero_level() {
         <span class="kw">let </span>logger = make_logger_filter(<span class="macro">vec!</span>[
             Directive {
                 name: <span class="prelude-val">None</span>,
                 level: LevelFilter::Info,
             },
             Directive {
                 name: <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()),
                 level: LevelFilter::Off,
             },
         ]);
         <span class="macro">assert!</span>(!enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Error, <span class="string">&quot;crate1::mod1&quot;</span>));
         <span class="macro">assert!</span>(enabled(<span class="kw-2">&amp;</span>logger.directives, Level::Info, <span class="string">&quot;crate2::mod2&quot;</span>));
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_valid() {
         <span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=error,crate1::mod2,crate2=debug&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">3</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Error);

         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].level, LevelFilter::max());

         <span class="macro">assert_eq!</span>(dirs[<span class="number">2</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">2</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_invalid_crate() {
         <span class="comment">// test parse_spec with multiple = in specification
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=warn=info,crate2=debug&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_invalid_level() {
         <span class="comment">// test parse_spec with &#39;noNumber&#39; as log level
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=noNumber,crate2=debug&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_string_level() {
         <span class="comment">// test parse_spec with &#39;warn&#39; as log level
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=wrong,crate2=warn&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Warn);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_empty_level() {
         <span class="comment">// test parse_spec with &#39;&#39; as log level
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=wrong,crate2=&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::max());
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_empty_level_isolated() {
         <span class="comment">// test parse_spec with &quot;&quot; as log level (and the entire spec str)
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;&quot;</span>); <span class="comment">// should be ignored
         </span><span class="macro">assert_eq!</span>(dirs.len(), <span class="number">0</span>);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_blank_level_isolated() {
         <span class="comment">// test parse_spec with a white-space-only string specified as the log
         // level (and the entire spec str)
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;     &quot;</span>); <span class="comment">// should be ignored
         </span><span class="macro">assert_eq!</span>(dirs.len(), <span class="number">0</span>);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_blank_level_isolated_comma_only() {
         <span class="comment">// The spec should contain zero or more comma-separated string slices,
         // so a comma-only string should be interpretted as two empty strings
         // (which should both be treated as invalid, so ignored).
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;,&quot;</span>); <span class="comment">// should be ignored
         </span><span class="macro">assert_eq!</span>(dirs.len(), <span class="number">0</span>);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_blank_level_isolated_comma_blank() {
         <span class="comment">// The spec should contain zero or more comma-separated string slices,
         // so this bogus spec should be interpretted as containing one empty
         // string and one blank string. Both should both be treated as
         // invalid, so ignored.
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;,     &quot;</span>); <span class="comment">// should be ignored
         </span><span class="macro">assert_eq!</span>(dirs.len(), <span class="number">0</span>);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_blank_level_isolated_blank_comma() {
         <span class="comment">// The spec should contain zero or more comma-separated string slices,
         // so this bogus spec should be interpretted as containing one blank
         // string and one empty string. Both should both be treated as
         // invalid, so ignored.
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;     ,&quot;</span>); <span class="comment">// should be ignored
         </span><span class="macro">assert_eq!</span>(dirs.len(), <span class="number">0</span>);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_global() {
         <span class="comment">// test parse_spec with no crate
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;warn,crate2=debug&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">2</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">None</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Warn);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_global_bare_warn_lc() {
         <span class="comment">// test parse_spec with no crate, in isolation, all lowercase
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;warn&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">None</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Warn);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_global_bare_warn_uc() {
         <span class="comment">// test parse_spec with no crate, in isolation, all uppercase
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;WARN&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">None</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Warn);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_global_bare_warn_mixed() {
         <span class="comment">// test parse_spec with no crate, in isolation, mixed case
         </span><span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;wArN&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">None</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Warn);
         <span class="macro">assert!</span>(filter.is_none());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_valid_filter() {
         <span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=error,crate1::mod2,crate2=debug/abc&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">3</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod1&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Error);

         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate1::mod2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">1</span>].level, LevelFilter::max());

         <span class="macro">assert_eq!</span>(dirs[<span class="number">2</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">2</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_some() &amp;&amp; filter.unwrap().to_string() == <span class="string">&quot;abc&quot;</span>);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_invalid_crate_filter() {
         <span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1::mod1=error=warn,crate2=debug/a.c&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate2&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::Debug);
         <span class="macro">assert!</span>(filter.is_some() &amp;&amp; filter.unwrap().to_string() == <span class="string">&quot;a.c&quot;</span>);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>parse_spec_empty_with_filter() {
         <span class="kw">let </span>(dirs, filter) = parse_spec(<span class="string">&quot;crate1/a*c&quot;</span>);
         <span class="macro">assert_eq!</span>(dirs.len(), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].name, <span class="prelude-val">Some</span>(<span class="string">&quot;crate1&quot;</span>.to_string()));
         <span class="macro">assert_eq!</span>(dirs[<span class="number">0</span>].level, LevelFilter::max());
         <span class="macro">assert!</span>(filter.is_some() &amp;&amp; filter.unwrap().to_string() == <span class="string">&quot;a*c&quot;</span>);
     }
 }
 </code></pre></div>
 </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="env_logger" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>