| // Copyright 2006, 2007 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.internal.util; |
| |
| import org.apache.tapestry5.test.TapestryTestCase; |
| import org.testng.annotations.Test; |
| |
| import java.io.File; |
| import java.net.URL; |
| |
| public class URLChangeTrackerTest extends TapestryTestCase |
| { |
| @Test |
| public void contains_change_when_empty() |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| assertFalse(t.containsChanges()); |
| } |
| |
| @Test |
| public void add_null_returns_zero() |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| assertEquals(t.add(null), 0l); |
| } |
| |
| @Test |
| public void contains_changes() throws Exception |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| File f = File.createTempFile("changetracker0", ".tmp"); |
| URL url = f.toURL(); |
| |
| t.add(url); |
| |
| // The file, and the directory containing the file. |
| |
| assertEquals(t.trackedFileCount(), 2); |
| |
| assertFalse(t.containsChanges()); |
| |
| boolean changed = false; |
| |
| // Because of clock accuracy, we need to try a couple of times |
| // to ensure that the change to the file is visible in the |
| // lastUpdated time stamp on the URL. |
| |
| for (int i = 0; i < 10 && !changed; i++) |
| { |
| Thread.sleep(100); |
| |
| touch(f); |
| |
| changed = t.containsChanges(); |
| } |
| |
| assertTrue(changed); |
| |
| // And, once a change has been observed ... |
| |
| assertFalse(t.containsChanges()); |
| } |
| |
| @Test |
| public void creating_a_new_file_is_a_change() throws Exception |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| File f = File.createTempFile("changetracker0", ".tmp"); |
| URL url = f.toURL(); |
| |
| t.add(url); |
| |
| assertFalse(t.containsChanges()); |
| |
| File dir = f.getParentFile(); |
| |
| // Create another file in the temporary directory. |
| |
| long timestamp = dir.lastModified(); |
| |
| while (true) |
| { |
| File.createTempFile("changetracker1", ".tmp"); |
| |
| if (dir.lastModified() != timestamp) break; |
| |
| // Sometime Java need a moment to catch up in terms of |
| // file system changes. Sleep for a few milliseconds |
| // and wait for it to catch up. |
| |
| Thread.sleep(100); |
| } |
| |
| assertTrue(t.containsChanges()); |
| } |
| |
| @Test |
| public void non_file_URLs_are_ignored() throws Exception |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| URL url = new URL("ftp://breeblebrox.com"); |
| |
| t.add(url); |
| |
| assertEquals(t.trackedFileCount(), 0); |
| } |
| |
| @Test |
| public void caching() throws Exception |
| { |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| File f = File.createTempFile("changetracker0", ".tmp"); |
| URL url = f.toURL(); |
| |
| long initial = t.add(url); |
| |
| touch(f); |
| |
| long current = t.add(url); |
| |
| assertEquals(current, initial); |
| |
| assertTrue(t.containsChanges()); |
| |
| t.clear(); |
| |
| current = t.add(url); |
| |
| assertFalse(current == initial); |
| } |
| |
| @Test |
| public void deleted_files_show_as_changes() throws Exception |
| { |
| File f = File.createTempFile("changetracker0", ".tmp"); |
| URL url = f.toURL(); |
| |
| URLChangeTracker t = new URLChangeTracker(); |
| |
| long timeModified = t.add(url); |
| |
| assertTrue(timeModified > 0); |
| |
| // File + Directory |
| assertEquals(t.trackedFileCount(), 2); |
| |
| assertFalse(t.containsChanges()); |
| |
| assertTrue(f.delete()); |
| |
| assertTrue(t.containsChanges()); |
| } |
| |
| @Test |
| public void second_level_granularity() throws Exception |
| { |
| URLChangeTracker t = new URLChangeTracker(true); |
| |
| File f = File.createTempFile("changetracker0", ".tmp"); |
| URL url = f.toURL(); |
| |
| touch(f); |
| long timestamp1 = t.add(url); |
| assertEquals(0, timestamp1 % 1000); |
| assertFalse(t.containsChanges()); |
| |
| Thread.sleep(1500); |
| |
| touch(f); |
| long timestamp2 = t.add(url); |
| assertEquals(0, timestamp2 % 1000); |
| assertTrue(t.containsChanges()); |
| } |
| |
| } |