chore: import upstream snapshot with attribution

test/cpp/phi/common/test_backend.cc

@@ -0,0 +1,77 @@
+/* Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+
+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 <gtest/gtest.h>
+
+#include <iostream>
+
+#include "paddle/common/exception.h"
+#include "paddle/phi/common/backend.h"
+
+namespace phi {
+namespace tests {
+
+TEST(Backend, OStream) {
+  std::ostringstream oss;
+  oss << Backend::UNDEFINED;
+  EXPECT_EQ(oss.str(), "Undefined");
+  oss.str("");
+  oss << Backend::CPU;
+  EXPECT_EQ(oss.str(), "CPU");
+  oss.str("");
+  oss << Backend::GPU;
+  EXPECT_EQ(oss.str(), "GPU");
+  oss.str("");
+  oss << Backend::XPU;
+  EXPECT_EQ(oss.str(), "XPU");
+  oss.str("");
+  oss << Backend::ONEDNN;
+  EXPECT_EQ(oss.str(), "ONEDNN");
+  oss.str("");
+  oss << Backend::GPUDNN;
+  EXPECT_EQ(oss.str(), "GPUDNN");
+  oss.str("");
+  oss << Backend::KPS;
+  EXPECT_EQ(oss.str(), "KPS");
+  oss.str("");
+  try {
+    oss << Backend::NUM_BACKENDS;
+  } catch (const std::exception& exception) {
+    std::string ex_msg = exception.what();
+    EXPECT_TRUE(ex_msg.find("Invalid enum backend type") != std::string::npos);
+  }
+}
+
+TEST(Backend, StringToBackend) {
+  using paddle::experimental::StringToBackend;
+  EXPECT_EQ(Backend::UNDEFINED, StringToBackend("Undefined"));
+  EXPECT_EQ(Backend::CPU, StringToBackend("CPU"));
+  EXPECT_EQ(Backend::GPU, StringToBackend("GPU"));
+  EXPECT_EQ(Backend::XPU, StringToBackend("XPU"));
+  EXPECT_EQ(Backend::ONEDNN, StringToBackend("OneDNN"));
+  EXPECT_EQ(Backend::GPUDNN, StringToBackend("GPUDNN"));
+#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
+  EXPECT_EQ(Backend::GPU, StringToBackend("KPS"));
+#else
+  EXPECT_EQ(Backend::KPS, StringToBackend("KPS"));
+#endif
+  EXPECT_EQ(static_cast<Backend>(
+                static_cast<size_t>(Backend::NUM_BACKENDS) +
+                phi::CustomRegisteredDeviceMap::Instance()
+                    .GetOrRegisterGlobalDeviceTypeId("CustomBackend")),
+            StringToBackend("CustomBackend"));
+}
+
+}  // namespace tests
+}  // namespace phi