212     std::unique_ptr<BaseImpl> base1, base2;  in TEST_F()  local
214     std::tie(base1, destroy) = make_base(*event, expected_source);  in TEST_F()
215     set_prepare_placeholder(*base1);  in TEST_F()
216     EXPECT_TRUE(base1->get_prepare());  in TEST_F()
222     base2 = std::make_unique<BaseImpl>(*base1);  in TEST_F()
223     EXPECT_EQ(&base1->get_prepare(), &base2->get_prepare());  in TEST_F()
225     empty_base(std::move(*base1));  in TEST_F()
226     EXPECT_THROW(base1->get_prepare(), std::bad_optional_access);  in TEST_F()
231     *base1 = *base2;  in TEST_F()
232     EXPECT_EQ(&base1->get_prepare(), &base2->get_prepare());  in TEST_F()
237     base1.reset();  in TEST_F()