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// Copyright 2017 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.android.junctions;
import static com.google.common.truth.Truth.assertThat;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for WindowsJunctionCreator. */
@RunWith(JUnit4.class)
public class WindowsJunctionCreatorTest {
private Path tmproot = null;
@Before
public void acquireTmpRoot() {
String tmpEnv = System.getenv("TEST_TMPDIR");
assertThat(tmpEnv).isNotNull();
tmproot = FileSystems.getDefault().getPath(tmpEnv);
// Cast Path to Object to disambiguate which assertThat-overload to use.
assertThat((Object) tmproot).isNotNull();
}
@Test
public void testNullInput() throws Exception {
try (JunctionCreator jc = new WindowsJunctionCreator(tmproot.resolve("foo"))) {
// Cast Path to Object to disambiguate which assertThat-overload to use.
assertThat((Object) jc.create(null)).isNull();
}
}
@Test
public void testFileInput() throws Exception {
Path dir = tmproot.resolve("foo"); // [tmproot]/foo/
Path file = dir.resolve("bar"); // [tmproot]/foo/bar
Path juncroot = tmproot.resolve("junc"); // [tmproot]/junc/
Path junc = juncroot.resolve("0"); // [tmproot]/junc/0 -> [tmproot]/foo/bar
Path fileViaJunc = junc.resolve("bar"); // [tmproot]/junc/0/bar
try {
Files.createDirectories(dir);
Files.createDirectories(juncroot);
// Create a scratch file and assert its existence.
Files.write(file, "hello".getBytes());
assertThat(file.toFile().exists()).isTrue();
// Assert that the junction doesn't exist yet.
assertThat(junc.toFile().exists()).isFalse();
assertThat(fileViaJunc.toFile().exists()).isFalse();
try (JunctionCreator jc = new WindowsJunctionCreator(juncroot)) {
// Assert creation of a junction for a file (more precisely, for its parent directory).
// Cast Path to Object to disambiguate which assertThat-overload to use.
assertThat((Object) jc.create(file)).isEqualTo(fileViaJunc);
// Assert that the junction now exists.
assertThat(junc.toFile().exists()).isTrue();
// Sanity check: the `file` should still exist.
assertThat(file.toFile().exists()).isTrue();
// Assert that the junction indeed points to `dir`, by asserting the existence of `file`
// through the junction.
assertThat(fileViaJunc.toFile().exists()).isTrue();
}
// Assert that WindowsJunctionCreator.close cleaned up the junction and root directory, but
// not the files in the directory that the junction pointed to.
assertThat(junc.toFile().exists()).isFalse();
assertThat(juncroot.toFile().exists()).isFalse();
// Assert that the `file` and `directory` still exist. Deleting the junction should not have
// affected them.
assertThat(file.toFile().exists()).isTrue();
assertThat(dir.toFile().exists()).isTrue();
} finally {
file.toFile().delete();
dir.toFile().delete();
}
}
@Test
public void testJunctionCaching() throws Exception {
Path dir1 = tmproot.resolve("foo"); // [tmproot]/foo/
Path dir2 = dir1.resolve("foo"); // [tmproot]/foo/foo/
Path file1 = dir1.resolve("bar"); // [tmproot]/foo/bar
Path file2 = dir1.resolve("baz"); // [tmproot]/foo/baz
Path file3 = dir2.resolve("bar"); // [tmproot]/foo/foo/bar
Path juncroot = tmproot.resolve("junc"); // [tmproot]/junc/
Path junc0 = juncroot.resolve("0"); // [tmproot]/junc/0 -> [tmproot]/foo/
Path junc1 = juncroot.resolve("1"); // [tmproot]/junc/1 -> [tmproot]/foo/foo/
Path file1junc = junc0.resolve("bar"); // [tmproot]/junc/0/bar
Path file2junc = junc0.resolve("baz"); // [tmproot]/junc/0/baz
Path file3junc = junc1.resolve("bar"); // [tmproot]/junc/1/bar
try {
Files.createDirectories(dir2);
Files.createDirectories(juncroot);
// Create scratch files and assert their existence.
Files.write(file1, "i am file1".getBytes());
Files.write(file2, "i am file2".getBytes());
Files.write(file3, "i am file3".getBytes());
assertThat(file1.toFile().exists()).isTrue();
assertThat(file2.toFile().exists()).isTrue();
assertThat(file3.toFile().exists()).isTrue();
// Assert that the junctions don't exist yet.
assertThat(junc0.toFile().exists()).isFalse();
assertThat(junc1.toFile().exists()).isFalse();
assertThat(file1junc.toFile().exists()).isFalse();
assertThat(file2junc.toFile().exists()).isFalse();
assertThat(file3junc.toFile().exists()).isFalse();
try (JunctionCreator jc = new WindowsJunctionCreator(juncroot)) {
Path dir1juncActual = jc.create(dir1);
Path file1juncActual = jc.create(file1);
Path dir2juncActual = jc.create(dir2);
Path file3juncActual = jc.create(file3);
Path file2juncActual = jc.create(file2);
// Assert that the junctions now exists.
assertThat(dir1juncActual.toFile().exists()).isTrue();
assertThat(dir2juncActual.toFile().exists()).isTrue();
assertThat(file1juncActual.toFile().exists()).isTrue();
assertThat(file2juncActual.toFile().exists()).isTrue();
assertThat(file3juncActual.toFile().exists()).isTrue();
// Assert that the junctions were chached.
// Cast Path to Object to disambiguate which assertThat-overload to use.
assertThat((Object) dir1juncActual).isEqualTo(junc0);
assertThat((Object) dir2juncActual).isEqualTo(junc1);
assertThat((Object) file1juncActual).isEqualTo(file1junc);
assertThat((Object) file2juncActual).isEqualTo(file2junc);
assertThat((Object) file3juncActual).isEqualTo(file3junc);
assertThat((Object) file1juncActual.getParent()).isEqualTo(junc0);
assertThat((Object) file2juncActual.getParent()).isEqualTo(junc0);
assertThat((Object) file3juncActual.getParent()).isEqualTo(junc1);
// Assert that the directory junctions indeed point where they should, by asserting the
// existence of `file1`, `file2`, and `file3` through them.
assertThat(dir1juncActual.resolve("bar").toFile().exists()).isTrue();
assertThat(dir1juncActual.resolve("baz").toFile().exists()).isTrue();
assertThat(dir2juncActual.resolve("bar").toFile().exists()).isTrue();
// Assert that the file junctions indeed point where they should, by asserting the contents
// we can read from them.
assertThat(Files.readAllBytes(file1junc)).isEqualTo("i am file1".getBytes());
assertThat(Files.readAllBytes(file2junc)).isEqualTo("i am file2".getBytes());
assertThat(Files.readAllBytes(file3junc)).isEqualTo("i am file3".getBytes());
}
// Assert that WindowsJunctionCreator.close cleaned up the junction and root directory, but
// not the files in the directory that the junction pointed to.
assertThat(junc0.toFile().exists()).isFalse();
assertThat(junc1.toFile().exists()).isFalse();
assertThat(file1junc.toFile().exists()).isFalse();
assertThat(file2junc.toFile().exists()).isFalse();
assertThat(file3junc.toFile().exists()).isFalse();
assertThat(juncroot.toFile().exists()).isFalse();
// Assert that the original files (and consequently the directories) still exist. Deleting the
// junction should not have affected them.
assertThat(file1.toFile().exists()).isTrue();
assertThat(file2.toFile().exists()).isTrue();
assertThat(file3.toFile().exists()).isTrue();
} finally {
file3.toFile().delete();
file2.toFile().delete();
file1.toFile().delete();
dir2.toFile().delete();
dir1.toFile().delete();
}
}
}
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