Class Assert

cpp/src/arrow/dataset/dataset_test.cc:281–293

TEST(TestProjector, CheckProjectable) {
  struct Assert {
    explicit Assert(FieldVector from) : from_(from) {}
    Schema from_;

    void ProjectableTo(FieldVector to) {
      ARROW_EXPECT_OK(CheckProjectable(from_, Schema(to)));
    }

    void NotProjectableTo(FieldVector to, std::string substr = "") {
      EXPECT_RAISES_WITH_MESSAGE_THAT(TypeError, testing::HasSubstr(substr),
                                      CheckProjectable(from_, Schema(to)));
    }
  };

  auto i8 = field("i8", int8());
  auto u16 = field("u16", uint16());