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// Copyright 2016 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.windows;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;
import static org.junit.Assert.fail;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.testutil.TestSpec;
import com.google.devtools.build.lib.util.OS;
import com.google.devtools.build.lib.windows.util.WindowsTestUtil;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link WindowsFileOperations}. */
@RunWith(JUnit4.class)
@TestSpec(localOnly = true, supportedOs = OS.WINDOWS)
public class WindowsFileOperationsTest {
private String scratchRoot;
@Before
public void loadJni() throws Exception {
String jniDllPath = WindowsTestUtil.getRunfile("io_bazel/src/main/native/windows_jni.dll");
WindowsJniLoader.loadJniForTesting(jniDllPath);
scratchRoot = new File(System.getenv("TEST_TMPDIR")).getAbsolutePath() + "/x";
deleteAllUnder(scratchRoot);
}
@After
public void cleanupScratchDir() throws Exception {
deleteAllUnder(scratchRoot);
}
private void deleteAllUnder(String path) throws IOException {
if (new File(scratchRoot).exists()) {
runCommand("cmd.exe /c rd /s /q \"" + scratchRoot + "\"");
}
}
// Do not use WindowsFileSystem.createDirectoryJunction but reimplement junction creation here.
// If that method were buggy, using it here would compromise the test.
private void createJunctions(Map<String, String> links) throws Exception {
List<String> args = new ArrayList<>();
boolean first = true;
// Shell out to cmd.exe to create all junctions in one go.
// Running "cmd.exe /c command1 arg1 arg2 && command2 arg1 ... argN && ..." will run all
// commands within one cmd.exe invocation.
for (Map.Entry<String, String> e : links.entrySet()) {
if (first) {
args.add("cmd.exe /c");
first = false;
} else {
args.add("&&");
}
args.add(
String.format(
"mklink /j \"%s/%s\" \"%s/%s\"", scratchRoot, e.getKey(), scratchRoot, e.getValue()));
}
runCommand(args);
}
private void runCommand(List<String> args) throws IOException {
runCommand(Joiner.on(' ').join(args));
}
private void runCommand(String cmd) throws IOException {
Process p = Runtime.getRuntime().exec(cmd);
try {
// Wait no more than 5 seconds to create all junctions.
p.waitFor(5, TimeUnit.SECONDS);
} catch (InterruptedException e) {
fail("Failed to execute command; cmd: " + cmd);
}
assertWithMessage("Command failed: " + cmd).that(p.exitValue()).isEqualTo(0);
}
private Path scratchDir(String path) throws IOException {
return Files.createDirectories(new File(scratchRoot + "/" + path).toPath());
}
private void scratchFile(String path, String... contents) throws IOException {
File fd = new File(scratchRoot + "/" + path);
Files.createDirectories(fd.toPath().getParent());
try (FileWriter w = new FileWriter(fd)) {
for (String line : contents) {
w.write(line);
w.write('\n');
}
}
}
@Test
public void testMockJunctionCreation() throws Exception {
String root = scratchDir("dir").getParent().toString();
scratchFile("dir/file.txt", "hello");
createJunctions(ImmutableMap.of("junc", "dir"));
String[] children = new File(root + "/junc").list();
assertThat(children).isNotNull();
assertThat(children).hasLength(1);
assertThat(Arrays.asList(children)).containsExactly("file.txt");
}
@Test
public void testIsJunction() throws Exception {
final Map<String, String> junctions = new HashMap<>();
junctions.put("shrtpath/a", "shrttrgt");
junctions.put("shrtpath/b", "longtargetpath");
junctions.put("shrtpath/c", "longta~1");
junctions.put("longlinkpath/a", "shrttrgt");
junctions.put("longlinkpath/b", "longtargetpath");
junctions.put("longlinkpath/c", "longta~1");
junctions.put("abbrev~1/a", "shrttrgt");
junctions.put("abbrev~1/b", "longtargetpath");
junctions.put("abbrev~1/c", "longta~1");
String root = scratchDir("shrtpath").getParent().toAbsolutePath().toString();
scratchDir("longlinkpath");
scratchDir("abbreviated");
scratchDir("control/a");
scratchDir("control/b");
scratchDir("control/c");
scratchFile("shrttrgt/file1.txt", "hello");
scratchFile("longtargetpath/file2.txt", "hello");
createJunctions(junctions);
assertThat(WindowsFileOperations.isJunction(root + "/shrtpath/a")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/shrtpath/b")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/shrtpath/c")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longlinkpath/a")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longlinkpath/b")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longlinkpath/c")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longli~1/a")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longli~1/b")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/longli~1/c")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbreviated/a")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbreviated/b")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbreviated/c")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbrev~1/a")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbrev~1/b")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/abbrev~1/c")).isTrue();
assertThat(WindowsFileOperations.isJunction(root + "/control/a")).isFalse();
assertThat(WindowsFileOperations.isJunction(root + "/control/b")).isFalse();
assertThat(WindowsFileOperations.isJunction(root + "/control/c")).isFalse();
assertThat(WindowsFileOperations.isJunction(root + "/shrttrgt/file1.txt")).isFalse();
assertThat(WindowsFileOperations.isJunction(root + "/longtargetpath/file2.txt")).isFalse();
assertThat(WindowsFileOperations.isJunction(root + "/longta~1/file2.txt")).isFalse();
try {
WindowsFileOperations.isJunction(root + "/non-existent");
fail("expected to throw");
} catch (IOException e) {
assertThat(e.getMessage()).contains("GetFileAttributesA");
}
assertThat(Arrays.asList(new File(root + "/shrtpath/a").list())).containsExactly("file1.txt");
assertThat(Arrays.asList(new File(root + "/shrtpath/b").list())).containsExactly("file2.txt");
assertThat(Arrays.asList(new File(root + "/shrtpath/c").list())).containsExactly("file2.txt");
assertThat(Arrays.asList(new File(root + "/longlinkpath/a").list()))
.containsExactly("file1.txt");
assertThat(Arrays.asList(new File(root + "/longlinkpath/b").list()))
.containsExactly("file2.txt");
assertThat(Arrays.asList(new File(root + "/longlinkpath/c").list()))
.containsExactly("file2.txt");
assertThat(Arrays.asList(new File(root + "/abbreviated/a").list()))
.containsExactly("file1.txt");
assertThat(Arrays.asList(new File(root + "/abbreviated/b").list()))
.containsExactly("file2.txt");
assertThat(Arrays.asList(new File(root + "/abbreviated/c").list()))
.containsExactly("file2.txt");
}
}
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