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// Copyright 2014 Google Inc. All rights reserved.
//
// 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 com.google.devtools.build.lib.vfs;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* This tests how canonical paths and non-canonical paths are equal with each
* other, and also how paths from different filesystems behave with each other.
*/
@RunWith(JUnit4.class)
public class UnixPathEqualityTest {
private FileSystem otherUnixFs;
private FileSystem unixFs;
@Before
public void setUp() throws Exception {
unixFs = new UnixFileSystem();
otherUnixFs = new UnixFileSystem();
assertTrue(unixFs != otherUnixFs);
}
private void assertTwoWayEquals(Object obj1, Object obj2) {
assertTrue(obj1.equals(obj2));
assertTrue(obj2.equals(obj1));
assertEquals(obj1.hashCode(), obj2.hashCode());
}
private void assertTwoWayNotEquals(Object obj1, Object obj2) {
assertFalse(obj1.equals(obj2));
assertFalse(obj2.equals(obj1));
}
@Test
public void testPathsAreEqualEvenIfNotCanonical() {
// This path is already canonical, so there's no difference between
// the canonical / nonCanonical path, as far as equals is concerned
Path nonCanonical = unixFs.getPath("/a/canonical/unix/path");
Path canonical = unixFs.getPath("/a/canonical/unix/path");
assertTwoWayEquals(nonCanonical, canonical);
}
@Test
public void testPathsAreNeverEqualWithStrings() {
// Make sure that paths aren't equal to plain old strings
Path nonCanonical = unixFs.getPath("/a/non/../canonical/unix/path");
Path canonical = unixFs.getPath("/a/non/../canonical/unix/path");
assertTwoWayNotEquals(nonCanonical, "/a/non/../canonical/unix/path");
assertTwoWayNotEquals(canonical, "/a/non/../canonical/unix/path");
}
@Test
public void testCanonicalPathsFromDifferentFileSystemsAreNeverEqual() {
Path canonical = unixFs.getPath("/canonical/path");
Path otherCanonical = otherUnixFs.getPath("/canonical/path");
assertTwoWayNotEquals(canonical, otherCanonical);
}
@Test
public void testNonCanonicalPathsFromDifferentFileSystemsAreNeverEqual() {
Path nonCanonical = unixFs.getPath("/non/canonical/path");
Path otherNonCanonical = otherUnixFs.getPath("/non/canonical/path");
assertTwoWayNotEquals(nonCanonical, otherNonCanonical);
}
@Test
public void testCrossFilesystemStartsWithReturnsFalse() {
assertFalse(unixFs.getPath("/a").startsWith(otherUnixFs.getPath("/b")));
}
@Test
public void testCrossFilesystemOperationsForbidden() throws Exception {
Path a = unixFs.getPath("/a");
Path b = otherUnixFs.getPath("/b");
try {
a.renameTo(b);
fail();
} catch (IllegalArgumentException e) {
assertThat(e.getMessage()).contains("different filesystems");
}
try {
a.relativeTo(b);
fail();
} catch (IllegalArgumentException e) {
assertThat(e.getMessage()).contains("different filesystems");
}
try {
a.createSymbolicLink(b);
fail();
} catch (IllegalArgumentException e) {
assertThat(e.getMessage()).contains("different filesystems");
}
}
}
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