| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.configuration2; |
| |
| import static org.hamcrest.CoreMatchers.containsString; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertThrows; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| import org.apache.commons.configuration2.builder.FileBasedBuilderParametersImpl; |
| import org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder; |
| import org.apache.commons.configuration2.ex.ConfigurationException; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * A test class which tests functionality related to immutable configurations. |
| */ |
| public class TestImmutableConfiguration { |
| /** Constant for the name of a test properties file. */ |
| private static final String TEST_FILE = "test.properties"; |
| |
| /** |
| * Creates a test configuration object filled with properties. |
| * |
| * @return the test configuration |
| * @throws ConfigurationException if an error occurs |
| */ |
| private static PropertiesConfiguration createTestConfig() throws ConfigurationException { |
| return new FileBasedConfigurationBuilder<>(PropertiesConfiguration.class) |
| .configure(new FileBasedBuilderParametersImpl().setFile(ConfigurationAssert.getTestFile(TEST_FILE))).getConfiguration(); |
| } |
| |
| /** |
| * Obtains all keys from the given iteration. |
| * |
| * @param it the iterator |
| * @return a set with all keys |
| */ |
| private static Set<String> fetchKeys(final Iterator<String> it) { |
| final Set<String> keys = new HashSet<>(); |
| while (it.hasNext()) { |
| keys.add(it.next()); |
| } |
| return keys; |
| } |
| |
| /** |
| * Tests that exceptions thrown by the wrapped configuration are handled correctly. |
| */ |
| @Test |
| public void testExceptionHandling() { |
| final PropertiesConfiguration config = new PropertiesConfiguration(); |
| final String property = "nonExistingProperty"; |
| config.setThrowExceptionOnMissing(true); |
| final ImmutableConfiguration ic = ConfigurationUtils.unmodifiableConfiguration(config); |
| final NoSuchElementException e = assertThrows(NoSuchElementException.class, () -> ic.getString(property)); |
| assertThat(e.getMessage(), containsString(property)); |
| } |
| |
| /** |
| * Tests whether an immutable subset can be queried. |
| */ |
| @Test |
| public void testImmutableSubset() throws ConfigurationException { |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(createTestConfig()); |
| final ImmutableConfiguration subset = conf.immutableSubset("test"); |
| assertFalse(subset.isEmpty()); |
| assertEquals(1000000, subset.getLong("long")); |
| } |
| |
| /** |
| * Tests whether data can be accessed from an unmodifiable configuration. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationAccess() throws ConfigurationException { |
| final Configuration confOrg = createTestConfig(); |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(confOrg); |
| assertFalse(conf.isEmpty()); |
| for (final Iterator<String> it = confOrg.getKeys(); it.hasNext();) { |
| final String key = it.next(); |
| assertTrue(conf.containsKey(key), "Key not contained: " + key); |
| assertEquals(confOrg.getProperty(key), conf.getProperty(key), "Wrong value for " + key); |
| } |
| } |
| |
| /** |
| * Tests that a cast to a mutable configuration is not possible. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationCast() throws ConfigurationException { |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(createTestConfig()); |
| assertThrows(ClassCastException.class, () -> { |
| final Configuration mutableConf = (Configuration) conf; |
| mutableConf.clear(); |
| }); |
| } |
| |
| /** |
| * Tests an iteration over the keys of the immutable configuration. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationIterate() throws ConfigurationException { |
| final Configuration confOrg = createTestConfig(); |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(confOrg); |
| assertEquals(fetchKeys(confOrg.getKeys()), fetchKeys(conf.getKeys())); |
| } |
| |
| /** |
| * Tests that it is not possible to remove keys using the iterator. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationIteratorRemove() throws ConfigurationException { |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(createTestConfig()); |
| final Iterator<String> it = conf.getKeys(); |
| it.next(); |
| assertThrows(UnsupportedOperationException.class, it::remove); |
| } |
| |
| /** |
| * Tests whether an update of the original configuration is visible for the immutable view. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationLiveUpdate() throws ConfigurationException { |
| final Configuration confOrg = createTestConfig(); |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(confOrg); |
| final String key = "new.property"; |
| final String value = "new value"; |
| confOrg.addProperty(key, value); |
| assertEquals(value, conf.getString(key)); |
| } |
| |
| /** |
| * Tries to create an immutable configuration from a null object. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationNull() { |
| assertThrows(NullPointerException.class, () -> ConfigurationUtils.unmodifiableConfiguration(null)); |
| } |
| |
| /** |
| * Tests different access methods for properties. |
| */ |
| @Test |
| public void testUnmodifiableConfigurationOtherTypes() throws ConfigurationException { |
| final ImmutableConfiguration conf = ConfigurationUtils.unmodifiableConfiguration(createTestConfig()); |
| assertEquals((byte) 10, conf.getByte("test.byte")); |
| assertTrue(conf.getBoolean("test.boolean")); |
| assertEquals(10.25, conf.getDouble("test.double"), .05); |
| assertEquals(20.25f, conf.getFloat("test.float"), .05); |
| assertEquals(10, conf.getInt("test.integer")); |
| assertEquals(1000000L, conf.getLong("test.long")); |
| assertEquals((short) 1, conf.getShort("test.short")); |
| } |
| |
| /** |
| * Tests whether an unmodifiable hierarchical configuration can be created. |
| */ |
| @Test |
| public void testUnmodifiableHierarchicalConfiguration() { |
| final HierarchicalConfiguration<?> conf = new BaseHierarchicalConfiguration(); |
| final String key = "test"; |
| conf.addProperty(key, Boolean.TRUE); |
| final ImmutableHierarchicalConfiguration ihc = ConfigurationUtils.unmodifiableConfiguration(conf); |
| assertTrue(ihc.getBoolean(key)); |
| assertEquals(0, ihc.getMaxIndex(key)); |
| } |
| } |