Thread.yield();

    // let computation finish
    computeSignal.countDown();
    doneSignal.await();

    assertTrue(callCount.get() == 1);
    assertEquals("barfoo", result.get(0));
    assertEquals("barfoo", result.get(1));
    assertEquals("barfoo", result.get(2));
    assertEquals("barfoo", cache.getUnchecked(key));
  }

  // Test ignored because it is extremely flaky in CI builds

   * products that you would get from nesting for loops:
   *
   * {@snippet :
   * for (B b0 : sets.get(0)) {
   *   for (B b1 : sets.get(1)) {
   *     ...
   *     ImmutableList<B> tuple = ImmutableList.of(b0, b1, ...);
   *     // operate on tuple
   *   }
   * }
   * }
   *

    ImmutableList<Parameter> params = invokable.getParameters();
    assertEquals(2, params.size());
    assertEquals(TypeToken.of(int.class), params.get(0).getType());
    assertEquals(TypeToken.of(String.class), params.get(1).getType());
  }

  public void testMethod_equals() throws NoSuchMethodException {
    Method getMethod = List.class.getMethod("get", int.class);

    ImmutableList<Parameter> params = invokable.getParameters();
    assertEquals(2, params.size());
    assertEquals(TypeToken.of(int.class), params.get(0).getType());
    assertEquals(TypeToken.of(String.class), params.get(1).getType());
  }

  public void testMethod_equals() throws NoSuchMethodException {
    Method getMethod = List.class.getMethod("get", int.class);

  std::unique_ptr<char[]> value(new char[1]);

  TF_OperationGetAttrName(oper, 0, value.get(), s_);
  EXPECT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  EXPECT_EQ("v", string(static_cast<const char*>(value.get()), 1));
}

TEST_F(CApiAttributesTest, Errors) {
  auto desc = init("int");
  TF_SetAttrInt(desc, "v", 3);
  auto oper = TF_FinishOperation(desc, s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);