assertEquals(ImmutableSet.of(1), testTable.columnKeySet());
  }

  public void testColumnMap() {
    assertEquals(ImmutableMap.of(1, ImmutableMap.of('a', "blah")), testTable.columnMap());
  }

  public void testRow() {
    assertEquals(ImmutableMap.of(), testTable.row('A'));
    assertEquals(ImmutableMap.of(1, "blah"), testTable.row('a'));
  }

  public void testRowKeySet() {

        assertTrue(isPerfectSquare);
      } catch (ArithmeticException e) {
        assertFalse(isPerfectSquare);
      }
    }
  }

  @GwtIncompatible // TODO
  public void testPow() {
    for (long i : ALL_LONG_CANDIDATES) {
      for (int exp : EXPONENTS) {
        assertEquals(LongMath.pow(i, exp), valueOf(i).pow(exp).longValue());
      }
    }
  }

      assertTrue(testInstance.containsRow('a'));
      assertTrue(testInstance.containsRow('b'));
      assertFalse(testInstance.containsRow('c'));
    }
  }

  public void testRow() {
    for (ImmutableTable<Character, Integer, String> testInstance : getTestInstances()) {
      assertEquals(ImmutableMap.of(1, "foo", 2, "baz"), testInstance.row('a'));

    }

    // Test getThumbnailFile with existing file
    @Test
    public void test_getThumbnailFile_exists() throws IOException {
        Map<String, Object> docMap = new HashMap<>();
        docMap.put("_id", "testdoc");

        String filename = thumbnailManager.getImageFilename(docMap);
        File thumbnailFile = new File(tempDir, filename);
        thumbnailFile.getParentFile().mkdirs();
        thumbnailFile.createNewFile();

    assertEquals(expected, table.hashCode());
  }

  public void testToStringSize1() {
    table = create("foo", 1, 'a');
    assertThat(table.toString()).isEqualTo("{foo={1=a}}");
  }

  public void testRow() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), table.row("foo"));
  }

  // This test assumes that the implementation does not support null keys.

    for (long a : TEST_LONGS) {
      assertThrows(
          ArithmeticException.class,
          () -> UnsignedLong.fromLongBits(a).dividedBy(UnsignedLong.ZERO));
    }
  }

  public void testMod() {
    for (long a : TEST_LONGS) {
      for (long b : TEST_LONGS) {
        if (b != 0) {
          UnsignedLong aUnsigned = UnsignedLong.fromLongBits(a);

        assertEquals("/etc/passwd", AdminLogAction.sanitizeFilename("../../etc/passwd"));
        assertEquals("test.log", AdminLogAction.sanitizeFilename("..test.log"));
        assertEquals("testlog", AdminLogAction.sanitizeFilename("test..log"));
    }

    @Test
    public void test_sanitizeFilename_removesMultipleDoubleDots() {
        // "...." becomes "" (two ".." are removed)

          ArithmeticException.class,
          () -> {
            UnsignedInteger unused = UnsignedInteger.fromIntBits(a).dividedBy(UnsignedInteger.ZERO);
          });
    }
  }

  public void testMod() {
    for (int a : TEST_INTS) {
      for (int b : TEST_INTS) {
        if (b != 0) {
          UnsignedInteger aUnsigned = UnsignedInteger.fromIntBits(a);

  }

  public void testAbsent() {
    Optional<String> optionalName = Optional.absent();
    assertFalse(optionalName.isPresent());
  }

  public void testOf() {
    assertThat(Optional.of("training").get()).isEqualTo("training");
  }

  public void testOf_null() {
    assertThrows(NullPointerException.class, () -> Optional.of(null));
  }

                .build())
        .addEqualityGroup(
            ImmutableListMultimap.<String, Integer>builder().put("bar", 2).put("foo", 3).build())
        .testEquals();
  }

  public void testOf() {
    assertMultimapEquals(ImmutableListMultimap.of("one", 1), "one", 1);
    assertMultimapEquals(ImmutableListMultimap.of("one", 1, "two", 2), "one", 1, "two", 2);
    assertMultimapEquals(