Change RacyGitTests to create a racy git situation in a stable way
By using File#setLastModified, we can create a racy git situation stably. Tested with --runs_per_test=100 Bug: 526111 Change-Id: I60b3632d353e19f335668325aa603640be423f58 Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
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@ -46,7 +46,6 @@
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import static java.nio.charset.StandardCharsets.UTF_8;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assume.assumeTrue;
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import java.io.File;
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import java.io.FileOutputStream;
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@ -63,8 +62,8 @@
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public class RacyGitTests extends RepositoryTestCase {
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@Test
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public void testIterator() throws IllegalStateException, IOException,
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InterruptedException {
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public void testIterator()
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throws IllegalStateException, IOException, InterruptedException {
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TreeSet<Long> modTimes = new TreeSet<>();
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File lastFile = null;
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for (int i = 0; i < 10; i++) {
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@ -128,9 +127,6 @@ public void testIterator() throws IllegalStateException, IOException,
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@Test
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public void testRacyGitDetection() throws Exception {
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TreeSet<Long> modTimes = new TreeSet<>();
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File lastFile;
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// Reset to force creation of index file
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try (Git git = new Git(db)) {
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git.reset().call();
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@ -138,45 +134,44 @@ public void testRacyGitDetection() throws Exception {
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// wait to ensure that modtimes of the file doesn't match last index
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// file modtime
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modTimes.add(valueOf(fsTick(db.getIndexFile())));
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fsTick(db.getIndexFile());
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// create two files
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addToWorkDir("a", "a");
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lastFile = addToWorkDir("b", "b");
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File a = addToWorkDir("a", "a");
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File b = addToWorkDir("b", "b");
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assertTrue(a.setLastModified(b.lastModified()));
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assertTrue(b.setLastModified(b.lastModified()));
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// wait to ensure that file-modTimes and therefore index entry modTime
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// doesn't match the modtime of index-file after next persistance
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modTimes.add(valueOf(fsTick(lastFile)));
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fsTick(b);
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// now add both files to the index. No racy git expected
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resetIndex(new FileTreeIteratorWithTimeControl(db, modTimes));
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resetIndex(new FileTreeIterator(db));
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assertEquals(
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"[a, mode:100644, time:t0, length:1, content:a]" +
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"[b, mode:100644, time:t0, length:1, content:b]",
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"[a, mode:100644, time:t0, length:1, content:a]"
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+ "[b, mode:100644, time:t0, length:1, content:b]",
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indexState(SMUDGE | MOD_TIME | LENGTH | CONTENT));
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// Remember the last modTime of index file. All modifications times of
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// further modification are translated to this value so it looks that
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// files have been modified in the same time slot as the index file
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long indexMod = db.getIndexFile().lastModified();
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modTimes.add(Long.valueOf(indexMod));
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// wait to ensure the file 'a' is updated at t1.
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fsTick(db.getIndexFile());
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// modify one file
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long aMod = addToWorkDir("a", "a2").lastModified();
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assumeTrue(aMod == indexMod);
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// now update the index the index. 'a' has to be racily clean -- because
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// it's modification time is exactly the same as the previous index file
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// mod time.
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resetIndex(new FileTreeIteratorWithTimeControl(db, modTimes));
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// Create a racy git situation. This is a situation that the index is
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// updated and then a file is modified within a second. By changing the
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// index file artificially, we create a fake racy situation.
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File updatedA = addToWorkDir("a", "a2");
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assertTrue(updatedA.setLastModified(updatedA.lastModified() + 100));
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resetIndex(new FileTreeIterator(db));
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assertTrue(db.getIndexFile()
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.setLastModified(updatedA.lastModified() + 90));
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db.readDirCache();
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// although racily clean a should not be reported as being dirty
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assertEquals(
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"[a, mode:100644, time:t1, smudged, length:0, content:a2]" +
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"[b, mode:100644, time:t0, length:1, content:b]",
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indexState(SMUDGE|MOD_TIME|LENGTH|CONTENT));
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"[a, mode:100644, time:t1, smudged, length:0, content:a2]"
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+ "[b, mode:100644, time:t0, length:1, content:b]",
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indexState(SMUDGE | MOD_TIME | LENGTH | CONTENT));
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}
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private File addToWorkDir(String path, String content) throws IOException {
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