TypeVariable<?> variable = new TypeParameter<T>() {}.typeVariable;
    TypeVariable<?> expected =
        TypeParameterTest.class.getDeclaredMethod("testCaptureTypeParameter")
            .getTypeParameters()[0];
    assertEquals(expected, variable);
  }

  public void testConcreteTypeRejected() {
    assertThrows(IllegalArgumentException.class, () -> new TypeParameter<String>() {});
  }

    Invokable<?, ?> factory = Invokable.from(constructor);
    assertThat(factory.getTypeParameters()).hasLength(2);
    assertEquals(type.getTypeParameters()[0], factory.getTypeParameters()[0]);
    assertEquals(constructor.getTypeParameters()[0], factory.getTypeParameters()[1]);
    ParameterizedType returnType = (ParameterizedType) factory.getReturnType().getType();

        assertArgumentNotNull("clazz", clazz);

        final Map<TypeVariable<?>, Type> map = CollectionsUtil.newLinkedHashMap();

        final TypeVariable<?>[] typeParameters = clazz.getTypeParameters();
        for (final TypeVariable<?> typeParameter : typeParameters) {
            map.put(typeParameter, getActualClass(typeParameter.getBounds()[0], map));
        }

    // return subclass as a raw type
    if (runtimeType instanceof Class
        && ((subclass.getTypeParameters().length == 0)
            || (getRawType().getTypeParameters().length != 0))) {
      // no resolution needed
      return subclass;
    }
    // class Base<A, B> {}
    // class Sub<X, Y> extends Base<X, Y> {}

    // test the 1st generic interface on the class
    Type fType = Supplier.class.getTypeParameters()[0];
    assertEquals(
        Integer.class, TypeToken.of(IntegerStringFunction.class).resolveType(fType).getRawType());

    // test the 2nd generic interface on the class
    Type predicateParameterType = Predicate.class.getTypeParameters()[0];
    assertEquals(
        new TypeToken<List<String>>() {}.getType(),

    // test the 1st generic interface on the class
    Type fType = Supplier.class.getTypeParameters()[0];
    assertEquals(
        Integer.class, TypeToken.of(IntegerStringFunction.class).resolveType(fType).getRawType());

    // test the 2nd generic interface on the class
    Type predicateParameterType = Predicate.class.getTypeParameters()[0];
    assertEquals(
        new TypeToken<List<String>>() {}.getType(),

        }
    }

    @Test
    public void test_classStructure() {
        // Verify the class is generic
        final java.lang.reflect.TypeVariable<?>[] typeParameters = FessActionValidator.class.getTypeParameters();
        assertEquals("Should have one type parameter", 1, typeParameters.length);
        assertEquals("Type parameter should be MESSAGES", "MESSAGES", typeParameters[0].getName());
    }

    @Test

    TypeToken<?> f = TypeToken.of(new TypeCapture<F>() {}.capture());
    assertEquals(String.class, f.resolveType(Function.class.getTypeParameters()[0]).getType());
    assertEquals(Integer.class, f.resolveType(Function.class.getTypeParameters()[1]).getType());
    assertEquals(Long.class, f.resolveType(Iterable.class.getTypeParameters()[0]).getType());
  }

  public <E extends Comparable<Iterable<String>> & Iterable<Integer>>

    }

    @Override
    void visitParameterizedType(ParameterizedType parameterizedType) {
      Class<?> rawClass = (Class<?>) parameterizedType.getRawType();
      TypeVariable<?>[] vars = rawClass.getTypeParameters();
      Type[] typeArgs = parameterizedType.getActualTypeArguments();
      checkState(vars.length == typeArgs.length);
      for (int i = 0; i < vars.length; i++) {

    assertThat(Types.toString(int[][].class)).isEqualTo(int[][].class.getName());
    assertThat(Types.toString(String[].class)).isEqualTo(String[].class.getName());
    Type elementType = List.class.getTypeParameters()[0];
    assertThat(Types.toString(elementType)).isEqualTo(elementType.toString());
  }

  public void testNullPointers() {
    new NullPointerTester().testStaticMethods(Types.class, Visibility.PACKAGE);
  }