### Question:
IdentityInputStreamMarshaller implements MethodDescriptor.Marshaller<InputStream> { @Override public InputStream parse(InputStream stream) { return stream; } private  IdentityInputStreamMarshaller(); static IdentityInputStreamMarshaller of(); @Override InputStream stream(InputStream value); @Override InputStream parse(InputStream stream);  }### Answer:
@Test public void testParse() { InputStream mockIs = mock(InputStream.class); assertSame(mockIs, IdentityInputStreamMarshaller.of().parse(mockIs)); }