Method GetFragmentsImpl

cpp/src/arrow/dataset/file_test.cc:439–444

 protected:
  Result<FragmentIterator> GetFragmentsImpl(compute::Expression predicate) override {
    FragmentVector fragments;
    fragments.push_back(std::make_shared<MockFragment>(0, 2, 1024, schema_));
    fragments.push_back(std::make_shared<MockFragment>(2 * 1024, 2, 1024, schema_));
    return MakeVectorIterator(std::move(fragments));
  };
};

TEST_F(TestFileSystemDataset, MultiThreadedWritePersistsOrder) {