TestCompiler.java 文件源码

/**
 * Asserts that the given diagnostics contain errors with a message containing "[CheckerName]"
 * on the given lines of the given file. If there should be multiple errors on a line, the line
 * number must appear multiple times. There may not be any errors in any other file.
 */
public void assertErrorsOnLines(String file,
    List<Diagnostic<? extends JavaFileObject>> diagnostics, long... lines) {
  ListMultimap<String, Long> actualErrors = ArrayListMultimap.create();
  for (Diagnostic<? extends JavaFileObject> diagnostic : diagnostics) {
    String message = diagnostic.getMessage(Locale.US);

    // The source may be null, e.g. for diagnostics about command-line flags
    assertNotNull(message, diagnostic.getSource());
    String sourceName = diagnostic.getSource().getName();

    assertEquals(
        "unexpected error in source file " + sourceName + ": " + message,
        file, sourceName);

    actualErrors.put(diagnostic.getSource().getName(), diagnostic.getLineNumber());

    // any errors from the compiler that are not related to this checker should fail
    assertThat(message).contains("[" + checker.getAnnotation(BugPattern.class).name() + "]");
  }

  assertEquals(
      ImmutableMultiset.copyOf(Longs.asList(lines)),
      ImmutableMultiset.copyOf(actualErrors.get(file)));
}