chore: import upstream snapshot with attribution

test/cpp/fluid/framework/variable_test.cc

@@ -0,0 +1,49 @@
+//   Copyright (c) 2018 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 "paddle/fluid/framework/variable.h"
+
+#include "gtest/gtest.h"
+
+namespace paddle {
+namespace framework {
+
+TEST(Variable, GetMutable) {
+  std::unique_ptr<Variable> v(new Variable());
+
+  auto* t = v->GetMutable<String>();
+  *t = "1234";
+
+  const auto& tt = v->Get<String>();
+  EXPECT_EQ("1234", tt);
+
+  try {
+    v->GetMutable<phi::DenseTensor>();
+  } catch (std::exception& e) {
+    return;
+  }
+  EXPECT_TRUE(false);
+
+  std::unique_ptr<Variable> v_ints(new Variable());
+  auto* v_t = v_ints->GetMutable<std::vector<int>>();
+  v_t->push_back(1);
+  v_t->push_back(2);
+
+  const auto& cv_t = v_ints->Get<std::vector<int>>();
+  EXPECT_EQ(cv_t[0], 1);
+  EXPECT_EQ(cv_t[1], 2);
+}
+
+}  // namespace framework
+}  // namespace paddle