Initial work

external/android-emugl/shared/emugl/common/smart_ptr_unittest.cpp

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+// Copyright (C) 2014 The Android Open Source Project
+//
+// 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 "emugl/common/smart_ptr.h"
+
+#include <gtest/gtest.h>
+
+namespace emugl {
+
+// This Test sub-class is used to track allocations and deallocations of
+// the MyTestClass instances that are created through newInstance().
+// See below for typical usage.
+class SmartPtrTest : public testing::Test {
+public:
+    SmartPtrTest() : mNewCount(0), mDeleteCount(0), mDoCount(0) {}
+
+    ~SmartPtrTest() {
+        mNewCount = 0;
+        mDoCount = 0;
+        mDeleteCount = 0;
+    }
+
+    class MyClass;
+
+    MyClass* newInstance() {
+        return new MyClass(this);
+    }
+
+    class MyClass {
+    public:
+        MyClass(SmartPtrTest* test) : mTest(test) {
+            mTest->mNewCount++;
+        }
+
+        void doStuff() {
+            mTest->mDoCount++;
+        }
+
+        ~MyClass() {
+            mTest->mDeleteCount++;
+        }
+    private:
+        SmartPtrTest* mTest;
+    };
+
+    int mNewCount;
+    int mDeleteCount;
+    int mDoCount;
+};
+
+
+TEST_F(SmartPtrTest, Empty) {
+    SmartPtr<MyClass> ptr;
+    EXPECT_FALSE(ptr.Ptr());
+
+    EXPECT_EQ(0, mNewCount);
+    EXPECT_EQ(0, mDeleteCount);
+    EXPECT_EQ(0, mDoCount);
+}
+
+
+TEST_F(SmartPtrTest, SingleRef) {
+    MyClass* obj = newInstance();
+    EXPECT_EQ(1, mNewCount);
+
+    {
+        SmartPtr<MyClass> ptr(obj);
+        EXPECT_EQ(obj, ptr.Ptr());
+
+        EXPECT_EQ(1, mNewCount);
+        EXPECT_EQ(0, mDeleteCount);
+        EXPECT_EQ(0, mDoCount);
+    }
+    // Check that the object was deleted.
+    EXPECT_EQ(1, mDeleteCount);
+}
+
+
+TEST_F(SmartPtrTest, CopyConstructor) {
+    MyClass* obj = newInstance();
+    EXPECT_EQ(1, mNewCount);
+
+    {
+        SmartPtr<MyClass> ptr1(obj);
+        {
+            SmartPtr<MyClass> ptr2(ptr1);
+            EXPECT_EQ(2, ptr1.getRefCount());
+            EXPECT_EQ(2, ptr2.getRefCount());
+            EXPECT_EQ(1, mNewCount);
+            EXPECT_EQ(0, mDeleteCount);
+            EXPECT_EQ(0, mDoCount);
+        }
+        EXPECT_EQ(1, mNewCount);
+        EXPECT_EQ(0, mDeleteCount);
+        EXPECT_EQ(0, mDoCount);
+    }
+    EXPECT_EQ(1, mNewCount);
+    EXPECT_EQ(1, mDeleteCount);
+    EXPECT_EQ(0, mDoCount);
+}
+
+
+TEST_F(SmartPtrTest, AssignmentOperator) {
+    SmartPtr<MyClass> ptr1(newInstance());
+    SmartPtr<MyClass> ptr2(newInstance());
+    EXPECT_EQ(2, mNewCount);
+    EXPECT_EQ(0, mDeleteCount);
+    EXPECT_EQ(0, mDoCount);
+
+    ptr2 = ptr1;
+    EXPECT_EQ(2, mNewCount);
+    EXPECT_EQ(1, mDeleteCount);
+
+    EXPECT_EQ(ptr1.Ptr(), ptr2.Ptr());
+    EXPECT_EQ(2, ptr1.getRefCount());
+    EXPECT_EQ(2, ptr2.getRefCount());
+}
+
+
+TEST_F(SmartPtrTest, ArrowOperator) {
+    SmartPtr<MyClass> ptr(newInstance());
+    ptr->doStuff();
+    EXPECT_EQ(1, mDoCount);
+
+    (*ptr).doStuff();
+    EXPECT_EQ(2, mDoCount);
+}
+
+}  // namespace emugl