Commons IO example source code file (FileAlterationObserverTestCase.java)
The Commons IO FileAlterationObserverTestCase.java source code/*
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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.commons.io.monitor;
import java.io.File;
import java.io.FileFilter;
import java.util.Iterator;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.CanReadFileFilter;
import org.apache.commons.io.filefilter.FileFilterUtils;
/**
* {@link FileAlterationObserver} Test Case.
*/
public class FileAlterationObserverTestCase extends AbstractMonitorTestCase {
/**
* Construct a new test case.
*
* @param name The name of the test
*/
public FileAlterationObserverTestCase(String name) {
super(name);
testDirName = "test-observer";
}
@Override
protected void setUp() throws Exception {
listener = new CollectionFileListener(true);
super.setUp();
}
/**
* Test add/remove listeners.
*/
public void testAddRemoveListeners() {
FileAlterationObserver observer = new FileAlterationObserver("/foo");
// Null Listener
observer.addListener(null);
assertFalse("Listeners[1]", observer.getListeners().iterator().hasNext());
observer.removeListener(null);
assertFalse("Listeners[2]", observer.getListeners().iterator().hasNext());
// Add Listener
FileAlterationListenerAdaptor listener = new FileAlterationListenerAdaptor();
observer.addListener(listener);
Iterator<FileAlterationListener> it = observer.getListeners().iterator();
assertTrue("Listeners[3]", it.hasNext());
assertEquals("Added", listener, it.next());
assertFalse("Listeners[4]", it.hasNext());
// Remove Listener
observer.removeListener(listener);
assertFalse("Listeners[5]", observer.getListeners().iterator().hasNext());
}
/**
* Test toString().
*/
public void testToString() {
File file = new File("/foo");
FileAlterationObserver observer = null;
observer = new FileAlterationObserver(file);
assertEquals("FileAlterationObserver[file='" + file.getPath() + "', listeners=0]",
observer.toString());
observer = new FileAlterationObserver(file, CanReadFileFilter.CAN_READ);
assertEquals("FileAlterationObserver[file='" + file.getPath() + "', CanReadFileFilter, listeners=0]",
observer.toString());
assertEquals(file, observer.getDirectory());
}
/**
* Test checkAndNotify() method
*/
public void testDirectory() {
try {
checkAndNotify();
checkCollectionsEmpty("A");
File testDirA = new File(testDir, "test-dir-A");
File testDirB = new File(testDir, "test-dir-B");
File testDirC = new File(testDir, "test-dir-C");
testDirA.mkdir();
testDirB.mkdir();
testDirC.mkdir();
File testDirAFile1 = touch(new File(testDirA, "A-file1.java"));
File testDirAFile2 = touch(new File(testDirA, "A-file2.txt")); // filter should ignore this
File testDirAFile3 = touch(new File(testDirA, "A-file3.java"));
File testDirAFile4 = touch(new File(testDirA, "A-file4.java"));
File testDirBFile1 = touch(new File(testDirB, "B-file1.java"));
checkAndNotify();
checkCollectionSizes("B", 3, 0, 0, 4, 0, 0);
assertTrue("B testDirA", listener.getCreatedDirectories().contains(testDirA));
assertTrue("B testDirB", listener.getCreatedDirectories().contains(testDirB));
assertTrue("B testDirC", listener.getCreatedDirectories().contains(testDirC));
assertTrue("B testDirAFile1", listener.getCreatedFiles().contains(testDirAFile1));
assertFalse("B testDirAFile2", listener.getCreatedFiles().contains(testDirAFile2));
assertTrue("B testDirAFile3", listener.getCreatedFiles().contains(testDirAFile3));
assertTrue("B testDirAFile4", listener.getCreatedFiles().contains(testDirAFile4));
assertTrue("B testDirBFile1", listener.getCreatedFiles().contains(testDirBFile1));
checkAndNotify();
checkCollectionsEmpty("C");
testDirAFile4 = touch(testDirAFile4);
FileUtils.deleteDirectory(testDirB);
checkAndNotify();
checkCollectionSizes("D", 0, 0, 1, 0, 1, 1);
assertTrue("D testDirB", listener.getDeletedDirectories().contains(testDirB));
assertTrue("D testDirAFile4", listener.getChangedFiles().contains(testDirAFile4));
assertTrue("D testDirBFile1", listener.getDeletedFiles().contains(testDirBFile1));
FileUtils.deleteDirectory(testDir);
checkAndNotify();
checkCollectionSizes("E", 0, 0, 2, 0, 0, 3);
assertTrue("E testDirA", listener.getDeletedDirectories().contains(testDirA));
assertTrue("E testDirAFile1", listener.getDeletedFiles().contains(testDirAFile1));
assertFalse("E testDirAFile2", listener.getDeletedFiles().contains(testDirAFile2));
assertTrue("E testDirAFile3", listener.getDeletedFiles().contains(testDirAFile3));
assertTrue("E testDirAFile4", listener.getDeletedFiles().contains(testDirAFile4));
testDir.mkdir();
checkAndNotify();
checkCollectionsEmpty("F");
checkAndNotify();
checkCollectionsEmpty("G");
} catch (Exception e) {
e.printStackTrace();
fail("Threw " + e);
}
}
/**
* Test checkAndNotify() creating
*/
public void testFileCreate() {
try {
checkAndNotify();
checkCollectionsEmpty("A");
File testDirA = new File(testDir, "test-dir-A");
testDirA.mkdir();
testDir = touch(testDir);
testDirA = touch(testDirA);
File testDirAFile1 = new File(testDirA, "A-file1.java");
File testDirAFile2 = touch(new File(testDirA, "A-file2.java"));
File testDirAFile3 = new File(testDirA, "A-file3.java");
File testDirAFile4 = touch(new File(testDirA, "A-file4.java"));
File testDirAFile5 = new File(testDirA, "A-file5.java");
checkAndNotify();
checkCollectionSizes("B", 1, 0, 0, 2, 0, 0);
assertFalse("B testDirAFile1", listener.getCreatedFiles().contains(testDirAFile1));
assertTrue("B testDirAFile2", listener.getCreatedFiles().contains(testDirAFile2));
assertFalse("B testDirAFile3", listener.getCreatedFiles().contains(testDirAFile3));
assertTrue("B testDirAFile4", listener.getCreatedFiles().contains(testDirAFile4));
assertFalse("B testDirAFile5", listener.getCreatedFiles().contains(testDirAFile5));
assertFalse("B testDirAFile1 exists", testDirAFile1.exists());
assertTrue("B testDirAFile2 exists", testDirAFile2.exists());
assertFalse("B testDirAFile3 exists", testDirAFile3.exists());
assertTrue("B testDirAFile4 exists", testDirAFile4.exists());
assertFalse("B testDirAFile5 exists", testDirAFile5.exists());
checkAndNotify();
checkCollectionsEmpty("C");
// Create file with name < first entry
testDirAFile1 = touch(testDirAFile1);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("D", 0, 1, 0, 1, 0, 0);
assertTrue("D testDirAFile1 exists", testDirAFile1.exists());
assertTrue("D testDirAFile1", listener.getCreatedFiles().contains(testDirAFile1));
// Create file with name between 2 entries
testDirAFile3 = touch(testDirAFile3);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("E", 0, 1, 0, 1, 0, 0);
assertTrue("E testDirAFile3 exists", testDirAFile3.exists());
assertTrue("E testDirAFile3", listener.getCreatedFiles().contains(testDirAFile3));
// Create file with name > last entry
testDirAFile5 = touch(testDirAFile5);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("F", 0, 1, 0, 1, 0, 0);
assertTrue("F testDirAFile5 exists", testDirAFile5.exists());
assertTrue("F testDirAFile5", listener.getCreatedFiles().contains(testDirAFile5));
} catch (Exception e) {
fail("Threw " + e);
}
}
/**
* Test checkAndNotify() creating
*/
public void testFileUpdate() {
try {
checkAndNotify();
checkCollectionsEmpty("A");
File testDirA = new File(testDir, "test-dir-A");
testDirA.mkdir();
testDir = touch(testDir);
testDirA = touch(testDirA);
File testDirAFile1 = touch(new File(testDirA, "A-file1.java"));
File testDirAFile2 = touch(new File(testDirA, "A-file2.java"));
File testDirAFile3 = touch(new File(testDirA, "A-file3.java"));
File testDirAFile4 = touch(new File(testDirA, "A-file4.java"));
File testDirAFile5 = touch(new File(testDirA, "A-file5.java"));
checkAndNotify();
checkCollectionSizes("B", 1, 0, 0, 5, 0, 0);
assertTrue("B testDirAFile1", listener.getCreatedFiles().contains(testDirAFile1));
assertTrue("B testDirAFile2", listener.getCreatedFiles().contains(testDirAFile2));
assertTrue("B testDirAFile3", listener.getCreatedFiles().contains(testDirAFile3));
assertTrue("B testDirAFile4", listener.getCreatedFiles().contains(testDirAFile4));
assertTrue("B testDirAFile5", listener.getCreatedFiles().contains(testDirAFile5));
assertTrue("B testDirAFile1 exists", testDirAFile1.exists());
assertTrue("B testDirAFile2 exists", testDirAFile2.exists());
assertTrue("B testDirAFile3 exists", testDirAFile3.exists());
assertTrue("B testDirAFile4 exists", testDirAFile4.exists());
assertTrue("B testDirAFile5 exists", testDirAFile5.exists());
checkAndNotify();
checkCollectionsEmpty("C");
// Update first entry
testDirAFile1 = touch(testDirAFile1);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("D", 0, 1, 0, 0, 1, 0);
assertTrue("D testDirAFile1", listener.getChangedFiles().contains(testDirAFile1));
// Update file with name between 2 entries
testDirAFile3 = touch(testDirAFile3);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("E", 0, 1, 0, 0, 1, 0);
assertTrue("E testDirAFile3", listener.getChangedFiles().contains(testDirAFile3));
// Update last entry
testDirAFile5 = touch(testDirAFile5);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("F", 0, 1, 0, 0, 1, 0);
assertTrue("F testDirAFile5", listener.getChangedFiles().contains(testDirAFile5));
} catch (Exception e) {
fail("Threw " + e);
}
}
/**
* Test checkAndNotify() deleting
*/
public void testFileDelete() {
try {
checkAndNotify();
checkCollectionsEmpty("A");
File testDirA = new File(testDir, "test-dir-A");
testDirA.mkdir();
testDir = touch(testDir);
testDirA = touch(testDirA);
File testDirAFile1 = touch(new File(testDirA, "A-file1.java"));
File testDirAFile2 = touch(new File(testDirA, "A-file2.java"));
File testDirAFile3 = touch(new File(testDirA, "A-file3.java"));
File testDirAFile4 = touch(new File(testDirA, "A-file4.java"));
File testDirAFile5 = touch(new File(testDirA, "A-file5.java"));
assertTrue("B testDirAFile1 exists", testDirAFile1.exists());
assertTrue("B testDirAFile2 exists", testDirAFile2.exists());
assertTrue("B testDirAFile3 exists", testDirAFile3.exists());
assertTrue("B testDirAFile4 exists", testDirAFile4.exists());
assertTrue("B testDirAFile5 exists", testDirAFile5.exists());
checkAndNotify();
checkCollectionSizes("B", 1, 0, 0, 5, 0, 0);
assertTrue("B testDirAFile1", listener.getCreatedFiles().contains(testDirAFile1));
assertTrue("B testDirAFile2", listener.getCreatedFiles().contains(testDirAFile2));
assertTrue("B testDirAFile3", listener.getCreatedFiles().contains(testDirAFile3));
assertTrue("B testDirAFile4", listener.getCreatedFiles().contains(testDirAFile4));
assertTrue("B testDirAFile5", listener.getCreatedFiles().contains(testDirAFile5));
checkAndNotify();
checkCollectionsEmpty("C");
// Delete first entry
FileUtils.deleteQuietly(testDirAFile1);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("D", 0, 1, 0, 0, 0, 1);
assertFalse("D testDirAFile1 exists", testDirAFile1.exists());
assertTrue("D testDirAFile1", listener.getDeletedFiles().contains(testDirAFile1));
// Delete file with name between 2 entries
FileUtils.deleteQuietly(testDirAFile3);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("E", 0, 1, 0, 0, 0, 1);
assertFalse("E testDirAFile3 exists", testDirAFile3.exists());
assertTrue("E testDirAFile3", listener.getDeletedFiles().contains(testDirAFile3));
// Delete last entry
FileUtils.deleteQuietly(testDirAFile5);
testDirA = touch(testDirA);
checkAndNotify();
checkCollectionSizes("F", 0, 1, 0, 0, 0, 1);
assertFalse("F testDirAFile5 exists", testDirAFile5.exists());
assertTrue("F testDirAFile5", listener.getDeletedFiles().contains(testDirAFile5));
} catch (Exception e) {
fail("Threw " + e);
}
}
/**
* Test checkAndNotify() method
*/
public void testObserveSingleFile() {
try {
File testDirA = new File(testDir, "test-dir-A");
File testDirAFile1 = new File(testDirA, "A-file1.java");
testDirA.mkdir();
FileFilter nameFilter = FileFilterUtils.nameFileFilter(testDirAFile1.getName());
createObserver(testDirA, nameFilter);
checkAndNotify();
checkCollectionsEmpty("A");
assertFalse("A testDirAFile1 exists", testDirAFile1.exists());
// Create
testDirAFile1 = touch(testDirAFile1);
File testDirAFile2 = touch(new File(testDirA, "A-file2.txt")); /* filter should ignore */
File testDirAFile3 = touch(new File(testDirA, "A-file3.java")); /* filter should ignore */
assertTrue("B testDirAFile1 exists", testDirAFile1.exists());
assertTrue("B testDirAFile2 exists", testDirAFile2.exists());
assertTrue("B testDirAFile3 exists", testDirAFile3.exists());
checkAndNotify();
checkCollectionSizes("C", 0, 0, 0, 1, 0, 0);
assertTrue("C created", listener.getCreatedFiles().contains(testDirAFile1));
assertFalse("C created", listener.getCreatedFiles().contains(testDirAFile2));
assertFalse("C created", listener.getCreatedFiles().contains(testDirAFile3));
// Modify
testDirAFile1 = touch(testDirAFile1);
testDirAFile2 = touch(testDirAFile2);
testDirAFile3 = touch(testDirAFile3);
checkAndNotify();
checkCollectionSizes("D", 0, 0, 0, 0, 1, 0);
assertTrue("D changed", listener.getChangedFiles().contains(testDirAFile1));
assertFalse("D changed", listener.getChangedFiles().contains(testDirAFile2));
assertFalse("D changed", listener.getChangedFiles().contains(testDirAFile3));
// Delete
FileUtils.deleteQuietly(testDirAFile1);
FileUtils.deleteQuietly(testDirAFile2);
FileUtils.deleteQuietly(testDirAFile3);
assertFalse("E testDirAFile1 exists", testDirAFile1.exists());
assertFalse("E testDirAFile2 exists", testDirAFile2.exists());
assertFalse("E testDirAFile3 exists", testDirAFile3.exists());
checkAndNotify();
checkCollectionSizes("E", 0, 0, 0, 0, 0, 1);
assertTrue("E deleted", listener.getDeletedFiles().contains(testDirAFile1));
assertFalse("E deleted", listener.getDeletedFiles().contains(testDirAFile2));
assertFalse("E deleted", listener.getDeletedFiles().contains(testDirAFile3));
} catch (Exception e) {
fail("Threw " + e);
}
}
/**
* Call {@link FileAlterationObserver#checkAndNotify()}.
*
* @throws Exception if an error occurs
*/
protected void checkAndNotify() throws Exception {
observer.checkAndNotify();
}
}
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