writer.write(STRING);
    writer.close();

    assertTrue(sink.wasStreamClosed());
    assertEquals(STRING, sink.getString());
  }

  public void testWrite_string() throws IOException {
    assertEquals("", sink.getString());
    sink.write(STRING);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
    assertEquals(STRING, sink.getString());
  }

  public void testWriteFrom_reader() throws IOException {

  }

  public void testToString() {
    assertEquals("{}", INSTANCE.toString());
  }

  public void testSize() {
    assertEquals(0, INSTANCE.size());
  }

  public void testGet() {
    assertNull(INSTANCE.get('a', 1));
  }

  public void testIsEmpty() {
    assertTrue(INSTANCE.isEmpty());
  }

  public void testCellSet() {
    assertEquals(ImmutableSet.of(), INSTANCE.cellSet());
  }

      for (int b : POSITIVE_INTEGER_CANDIDATES) {
        assertEquals(valueOf(a).gcd(valueOf(b)), valueOf(IntMath.gcd(a, b)));
      }
    }
  }

  public void testGCDZero() {
    for (int a : POSITIVE_INTEGER_CANDIDATES) {
      assertEquals(a, IntMath.gcd(a, 0));
      assertEquals(a, IntMath.gcd(0, a));
    }
    assertEquals(0, IntMath.gcd(0, 0));
  }

    assertEquals("font", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateImageType() {
    MediaType newType = MediaType.createImageType("yams");
    assertEquals("image", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateTextType() {
    MediaType newType = MediaType.createTextType("yams");
    assertEquals("text", newType.type());

        assertEquals(3, paramMap.size());
        assertEquals("111", paramMap.get("a")[0]);
        assertEquals("222", paramMap.get("b")[0]);
        assertEquals("333", paramMap.get("c")[0]);

        paramMap = filter.parseQueryString("a=1&b=2&c=3&a=2", "UTF-8");
        assertEquals(3, paramMap.size());
        assertEquals("1", paramMap.get("a")[0]);
        assertEquals("2", paramMap.get("a")[1]);
        assertEquals("2", paramMap.get("b")[0]);

    // Test default state of not started.
    assertEquals(1, listenerLatch.getCount());
    assertFalse(task.isDone());
    assertFalse(task.isCancelled());

    // Start the task to put it in the RUNNING state.  Have to use a separate
    // thread because the task will block on the task latch after unblocking
    // the run latch.
    exec.execute(task);
    runLatch.await();
    assertEquals(1, listenerLatch.getCount());

        assertNotNull(ref);
        assertEquals(getTestDfsTargetServer().toLowerCase(Locale.ROOT), ref.getServer().toLowerCase(Locale.ROOT));
        assertEquals(dfsTestSharePath.length() - 1, ref.getPathConsumed());

        DfsReferralData ref2 = doResolve(dfsTestSharePath, "", true, true);

        assertNotNull(ref2);

        final ResponseData responseData = fsClient.doGet(path);
        assertEquals(200, responseData.getHttpStatusCode());
        assertEquals("UTF-8", responseData.getCharSet());
        assertEquals(6, responseData.getContentLength());
        assertNotNull(responseData.getLastModified());
        assertEquals(Constants.GET_METHOD, responseData.getMethod());
        assertEquals("text/plain", responseData.getMimeType());

        assertEquals("1guest", permissionHelper.encode("{user}guest"));
        assertEquals("Rguest", permissionHelper.encode("{role}guest"));
        assertEquals("2guest", permissionHelper.encode("{group}guest"));
        assertEquals("1guest", permissionHelper.encode("{USER}guest"));
        assertEquals("Rguest", permissionHelper.encode("{ROLE}guest"));
        assertEquals("2guest", permissionHelper.encode("{GROUP}guest"));

      cache.invalidate(key1);
      assertFalse(cache.asMap().containsKey(key1));
      assertTrue(cache.asMap().containsKey(key2));
      assertEquals(1, cache.size());
      assertEquals(ImmutableSet.of(key2), cache.asMap().keySet());
      assertThat(cache.asMap().values()).contains(value2);
      assertEquals(ImmutableSet.of(immutableEntry(key2, value2)), cache.asMap().entrySet());
    }
  }