assertThat(map.getAt(0), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {
        assertThat(map.put("1", "test3"), is("test"));
        assertThat(map.get("1"), is("test3"));
        assertThat(map.getAt(1), is("test3"));
        map.put(null, "test4");
        map.put(null, "test5");
    }

        tester.init(subjectGenerator, name, setUp, tearDown);
      }
    }

    return suite;
  }

  private TestSuite filterSuite(TestSuite suite) {
    TestSuite filtered = new TestSuite(suite.getName());
    Enumeration<?> tests = suite.tests();
    while (tests.hasMoreElements()) {
      Test test = (Test) tests.nextElement();
      if (matches(test)) {

    // in our test environment, which foils the purpose of this test, so we disable the logic for
    // our test by setting a static field. We are changing the field in the parallel version of FRQ
    // and each test creates its own one of those, so there is no test interference here.
    Class<?> sepFrqSystemLoaderC =

   *       {@code cls}:
   *       <ul>
   *         <li>Test will fail if default value for a parameter cannot be determined.
   *         <li>Test will fail if the factory method returns null so testing instance methods is
   *             impossible.
   *         <li>Test will fail if the constructor or factory method throws exception.
   *       </ul>

   * TODO(cpovirk): It would be great to run all these tests (including class unloading) in an
   * environment that forces Futures.getChecked to its fallback WeakSetValidator. One awful way of
   * doing so would be to derive a separate test library by using remove_from_jar to strip out
   * ClassValueValidator.
   *
   * Fortunately, we get pretty good coverage "by accident": We run all these tests against the

import junit.framework.Test;
import junit.framework.TestSuite;

/**
 * Generates a test suite covering the {@link Map} implementations in the {@link java.util} package.
 * Can be subclassed to specify tests that should be suppressed.
 *
 * @author Kevin Bourrillion
 */
@GwtIncompatible
public class TestsForMapsInJavaUtil {

  public static Test suite() {

    TestSuite suite = new TestSuite();
    suite.addTest(
        ByteSourceTester.tests(
            "Files.asByteSource[File]", SourceSinkFactories.fileByteSourceFactory(), true));
    suite.addTest(
        ByteSinkTester.tests("Files.asByteSink[File]", SourceSinkFactories.fileByteSinkFactory()));
    suite.addTest(
        ByteSinkTester.tests(
            "Files.asByteSink[File, APPEND]", SourceSinkFactories.appendingFileByteSinkFactory()));

import junit.framework.TestSuite;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for the default implementations of {@code ByteSource} methods.
 *
 * @author Colin Decker
 */
public class ByteSourceTest extends IoTestCase {

  @AndroidIncompatible // Android doesn't understand suites whose tests lack default constructors.
  public static TestSuite suite() {
    TestSuite suite = new TestSuite();

    assertThat(e).hasMessageThat().contains(ENDPOINTS_MISMATCH);
  }

  /**
   * Tests that the method {@code putEdge} will silently add the missing nodes to the graph, then
   * add the edge connecting them. We are not using the proxy methods here as we want to test {@code
   * putEdge} when the end-points are not elements of the graph.
   */
  @Test
  public void putEdge_nodesNotInGraph() {
    assume().that(graphIsMutable()).isTrue();

    suite.addTest(
        ByteSinkTester.tests(
            "MoreFiles.asByteSink[Path]", SourceSinkFactories.pathByteSinkFactory()));
    suite.addTest(
        ByteSinkTester.tests(
            "MoreFiles.asByteSink[Path, APPEND]",
            SourceSinkFactories.appendingPathByteSinkFactory()));
    suite.addTest(
        CharSourceTester.tests(
            "MoreFiles.asCharSource[Path, Charset]",