PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
      stringFunnel(charset).funnel("test", primitiveSink);
      verify(primitiveSink).putString("test", charset);
    }
  }

  public void testForStringsCharset_null() {
    for (Charset charset : Charset.availableCharsets().values()) {
      assertNullsThrowException(stringFunnel(charset));
    }
  }

  public void testForInts() {
    Integer value = 1234;