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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.skyframe;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.skyframe.DiffAwareness.View;
import com.google.devtools.build.lib.skyframe.LocalDiffAwareness.Options;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.common.options.OptionsBase;
import com.google.devtools.common.options.OptionsClassProvider;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link MacOSXFsEventsDiffAwareness} */
@RunWith(JUnit4.class)
public class MacOSXFsEventsDiffAwarenessTest {
private static void rmdirs(Path directory) throws IOException {
Files.walkFileTree(
directory,
new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
throws IOException {
Files.delete(file);
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
Files.delete(dir);
return FileVisitResult.CONTINUE;
}
});
}
private MacOSXFsEventsDiffAwareness underTest;
private Path watchedPath;
private OptionsClassProvider watchFsEnabledProvider;
@Before
public void setUp() throws Exception {
watchedPath = com.google.common.io.Files.createTempDir().getCanonicalFile().toPath();
underTest = new MacOSXFsEventsDiffAwareness(watchedPath.toString());
LocalDiffAwareness.Options localDiffOptions = new LocalDiffAwareness.Options();
localDiffOptions.watchFS = true;
watchFsEnabledProvider = new LocalDiffAwarenessOptionsProvider(localDiffOptions);
}
@After
public void tearDown() throws Exception {
underTest.close();
rmdirs(watchedPath);
}
private void scratchFile(String path, String content) throws IOException {
Path p = watchedPath.resolve(path);
p.getParent().toFile().mkdirs();
com.google.common.io.Files.write(content.getBytes(StandardCharsets.UTF_8), p.toFile());
}
private void scratchFile(String path) throws IOException {
scratchFile(path, "");
}
private void assertDiff(View view1, View view2, Object... paths)
throws IncompatibleViewException, BrokenDiffAwarenessException {
ImmutableSet<PathFragment> modifiedSourceFiles =
underTest.getDiff(view1, view2).modifiedSourceFiles();
ImmutableSet<String> toStringSourceFiles = toString(modifiedSourceFiles);
assertThat(toStringSourceFiles).containsExactly(paths);
}
private static ImmutableSet<String> toString(ImmutableSet<PathFragment> modifiedSourceFiles) {
ImmutableSet.Builder<String> builder = ImmutableSet.builder();
for (PathFragment path : modifiedSourceFiles) {
if (!path.toString().isEmpty()) {
builder.add(path.toString());
}
}
return builder.build();
}
@Test
public void testSimple() throws Exception {
View view1 = underTest.getCurrentView(watchFsEnabledProvider);
scratchFile("a/b/c");
scratchFile("b/c/d");
Thread.sleep(200); // Wait until the events propagate
View view2 = underTest.getCurrentView(watchFsEnabledProvider);
assertDiff(view1, view2, "a", "a/b", "a/b/c", "b", "b/c", "b/c/d");
rmdirs(watchedPath.resolve("a"));
rmdirs(watchedPath.resolve("b"));
Thread.sleep(200); // Wait until the events propagate
View view3 = underTest.getCurrentView(watchFsEnabledProvider);
assertDiff(view2, view3, "a", "a/b", "a/b/c", "b", "b/c", "b/c/d");
}
/**
* Only returns a fixed options class for {@link LocalDiffAwareness.Options}.
*/
private static final class LocalDiffAwarenessOptionsProvider implements OptionsClassProvider {
private final Options localDiffOptions;
private LocalDiffAwarenessOptionsProvider(Options localDiffOptions) {
this.localDiffOptions = localDiffOptions;
}
@Override
public <O extends OptionsBase> O getOptions(Class<O> optionsClass) {
if (optionsClass.equals(LocalDiffAwareness.Options.class)) {
return optionsClass.cast(localDiffOptions);
}
return null;
}
}
}
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