return input.length();
    }
  }

  private static final Equivalence<String> LENGTH_EQUIVALENCE =
      Equivalence.equals().onResultOf(LengthFunction.INSTANCE);

  public void testWrap() {
    new EqualsTester()
        .addEqualityGroup(
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("world"))

      return input.length();
    }
  }

  private static final Equivalence<String> LENGTH_EQUIVALENCE =
      Equivalence.equals().onResultOf(LengthFunction.INSTANCE);

  public void testWrap() {
    new EqualsTester()
        .addEqualityGroup(
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("world"))

    Properties testProp = new Properties();

    Map<String, String> result = Maps.fromProperties(testProp);
    assertTrue(result.isEmpty());
    testProp.setProperty("first", "true");

    result = Maps.fromProperties(testProp);
    assertEquals("true", result.get("first"));
    assertEquals(1, result.size());
    testProp.setProperty("second", "null");

    Properties testProp = new Properties();

    Map<String, String> result = Maps.fromProperties(testProp);
    assertTrue(result.isEmpty());
    testProp.setProperty("first", "true");

    result = Maps.fromProperties(testProp);
    assertEquals("true", result.get("first"));
    assertEquals(1, result.size());
    testProp.setProperty("second", "null");

    } catch (IllegalArgumentException expected) {
    }
  }

  public void testGap_connectedAdjacentYieldsEmpty() {
    Range<Integer> range = Range.open(3, 4);

    assertEquals(Range.closedOpen(4, 4), range.gap(Range.atLeast(4)));
    assertEquals(Range.openClosed(3, 3), range.gap(Range.atMost(3)));
  }

  public void testGap_general() {
    Range<Integer> openRange = Range.open(4, 8);

    } catch (IllegalArgumentException expected) {
    }
  }

  public void testGap_connectedAdjacentYieldsEmpty() {
    Range<Integer> range = Range.open(3, 4);

    assertEquals(Range.closedOpen(4, 4), range.gap(Range.atLeast(4)));
    assertEquals(Range.openClosed(3, 3), range.gap(Range.atMost(3)));
  }

  public void testGap_general() {
    Range<Integer> openRange = Range.open(4, 8);

import junit.framework.TestCase;

/** Tests for {@code CollectSpliterators}. */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public class CollectSpliteratorsTest extends TestCase {
  public void testMap() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.map(
                    Arrays.spliterator(new String[] {"a", "b", "c", "d", "e"}), Ascii::toUpperCase))

        assertThat(hoge.getElementClassOfCollection(), is(sameClass(String.class)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testMap() throws Exception {
        final BeanDesc beanDesc = new BeanDescImpl(MyBean.class);
        final FieldDesc hoge = beanDesc.getFieldDesc("map");
        assertThat(hoge.getKeyClassOfMap(), is(sameClass(String.class)));

        assertThat(WildcardType.class.isInstance(GenericsUtil.getElementTypeOfSet(t3)), is(true));
    }

    /**
     * @throws Exception
     */
    public void testMap() throws Exception {
        final Method m1 = MapType.class.getMethod("mapOfStringToObject");
        final Type t1 = m1.getGenericReturnType();
        assertThat(GenericsUtil.isTypeOf(t1, Map.class), is(true));

    Joiner j = Joiner.on("x").useForNull("y");
    try {
      j = j.useForNull("y");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

  public void testMap() {
    MapJoiner j = Joiner.on(';').withKeyValueSeparator(':');
    assertEquals("", j.join(ImmutableMap.of()));
    assertEquals(":", j.join(ImmutableMap.of("", "")));