Method NotProjectableTo

cpp/src/arrow/dataset/dataset_test.cc:289–292

    }

    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());