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// Copyright 2014 The Bazel Authors. 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 com.google.devtools.build.lib.testutil.TestUtils;
import com.google.devtools.build.lib.vfs.util.FileSystems;
import java.io.IOException;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* A test for {@link Path}.
*/
@RunWith(JUnit4.class)
public class PathGetParentTest {
private FileSystem fs;
private Path testRoot;
@Before
public final void createTestRoot() throws Exception {
fs = FileSystems.getNativeFileSystem();
testRoot = fs.getPath(TestUtils.tmpDir()).getRelative("UnixPathGetParentTest");
testRoot.createDirectoryAndParents();
}
@After
public final void deleteTestRoot() throws Exception {
testRoot.deleteTree(); // (comment out during debugging)
}
private Path getParent(String path) {
return fs.getPath(path).getParentDirectory();
}
@Test
public void testAbsoluteRootHasNoParent() {
assertThat(getParent("/")).isNull();
}
@Test
public void testParentOfSimpleDirectory() {
assertThat(getParent("/foo/bar").getPathString()).isEqualTo("/foo");
}
@Test
public void testParentOfDotDotInMiddleOfPathname() {
assertThat(getParent("/foo/../bar").getPathString()).isEqualTo("/");
}
@Test
public void testGetPathDoesNormalizationWithoutIO() throws IOException {
Path tmp = testRoot.getChild("tmp");
Path tmpWiz = tmp.getChild("wiz");
tmp.createDirectory();
// ln -sf /tmp /tmp/wiz
tmpWiz.createSymbolicLink(tmp);
assertThat(tmp.getParentDirectory()).isEqualTo(testRoot);
assertThat(tmpWiz.getParentDirectory()).isEqualTo(tmp);
// Under UNIX, inode(/tmp/wiz/..) == inode(/). However getPath() does not
// perform I/O, only string operations, so it disagrees:
assertThat(tmp.getRelative(PathFragment.create("wiz/.."))).isEqualTo(tmp);
}
}