Add stream test

Signed-off-by: Nghia Truong <[email protected]>

cpp/tests/CMakeLists.txt

@@ -718,6 +718,7 @@ ConfigureTest(
   streams/strings/contains_test.cpp
   streams/strings/convert_test.cpp
   streams/strings/extract_test.cpp
+  streams/strings/factory_test.cpp
   streams/strings/filter_test.cpp
   streams/strings/find_test.cpp
   streams/strings/replace_test.cpp

cpp/tests/streams/strings/factory_test.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2024, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cudf_test/base_fixture.hpp>
+#include <cudf_test/column_wrapper.hpp>
+#include <cudf_test/default_stream.hpp>
+
+#include <cudf/column/column_factories.hpp>
+#include <cudf/detail/utilities/vector_factories.hpp>
+
+#include <rmm/device_uvector.hpp>
+
+#include <thrust/pair.h>
+
+#include <string>
+#include <vector>
+
+class StringsFactoryTest : public cudf::test::BaseFixture {};
+
+using string_pair = thrust::pair<char const*, cudf::size_type>;
+
+TEST_F(StringsFactoryTest, StringConstructionFromPairs)
+{
+  auto const stream = cudf::test::get_default_stream();
+
+  auto const h_data = std::vector<char>{'a', 'b', 'c'};
+  auto const d_data = cudf::detail::make_device_uvector_async(
+    h_data, stream, cudf::get_current_device_resource_ref());
+
+  auto const h_input =
+    std::vector<string_pair>{{d_data.data(), 1}, {d_data.data() + 1, 1}, {d_data.data() + 2, 1}};
+  auto const d_input = cudf::detail::make_device_uvector_async(
+    h_input, stream, cudf::get_current_device_resource_ref());
+  auto const input = cudf::device_span<string_pair const>{d_input.data(), d_input.size()};
+  cudf::make_strings_column(input, stream);
+}
+
+TEST_F(StringsFactoryTest, StringBatchConstruction)
+{
+  auto const stream = cudf::test::get_default_stream();
+
+  auto const h_data = std::vector<char>{'a', 'b', 'c'};
+  auto const d_data = cudf::detail::make_device_uvector_async(
+    h_data, stream, cudf::get_current_device_resource_ref());
+
+  auto const h_input =
+    std::vector<string_pair>{{d_data.data(), 1}, {d_data.data() + 1, 1}, {d_data.data() + 2, 1}};
+  auto const d_input = cudf::detail::make_device_uvector_async(
+    h_input, stream, cudf::get_current_device_resource_ref());
+
+  std::vector<cudf::device_span<string_pair const>> input(
+    10, cudf::device_span<string_pair const>{d_input.data(), d_input.size()});
+  cudf::make_strings_column_batch(input, stream);
+}