import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

xpcom/tests/gtest/TestAutoPtr.cpp

@@ -0,0 +1,220 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:ts=4:et:sw=4:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsAutoPtr.h"
+#include "gtest/gtest.h"
+
+class TestObjectBaseA {
+  public:
+    // Virtual dtor for deleting through base class pointer
+    virtual ~TestObjectBaseA() { }
+    void MemberFunction(int, int*, int&)
+    {
+    }
+    virtual void VirtualMemberFunction(int, int*, int&) { };
+    virtual void VirtualConstMemberFunction(int, int*, int&) const { };
+    int fooA;
+};
+
+class TestObjectBaseB {
+  public:
+    // Virtual dtor for deleting through base class pointer
+    virtual ~TestObjectBaseB() { }
+    int fooB;
+};
+
+class TestObject : public TestObjectBaseA, public TestObjectBaseB {
+  public:
+    TestObject()
+    {
+    }
+
+    // Virtual dtor for deleting through base class pointer
+    virtual ~TestObject()
+    {
+      destructed++;
+    }
+
+    virtual void VirtualMemberFunction(int, int*, int&) override
+    {
+    }
+    virtual void VirtualConstMemberFunction(int, int*, int&) const override
+    {
+    }
+
+    static int destructed;
+    static const void* last_ptr;
+};
+
+int TestObject::destructed = 0;
+const void* TestObject::last_ptr = nullptr;
+
+static void CreateTestObject(TestObject **aResult)
+{
+  *aResult = new TestObject();
+}
+
+static void DoSomethingWithTestObject(TestObject *aIn)
+{
+  TestObject::last_ptr = static_cast<void*>(aIn);
+}
+
+static void DoSomethingWithConstTestObject(const TestObject *aIn)
+{
+  TestObject::last_ptr = static_cast<const void*>(aIn);
+}
+
+static void DoSomethingWithTestObjectBaseB(TestObjectBaseB *aIn)
+{
+  TestObject::last_ptr = static_cast<void*>(aIn);
+}
+
+static void DoSomethingWithConstTestObjectBaseB(const TestObjectBaseB *aIn)
+{
+  TestObject::last_ptr = static_cast<const void*>(aIn);
+}
+
+TEST(AutoPtr, Assignment)
+{
+  TestObject::destructed = 0;
+
+  {
+    nsAutoPtr<TestObject> pobj( new TestObject() );
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+
+  {
+    nsAutoPtr<TestObject> pobj( new TestObject() );
+    pobj = new TestObject();
+    ASSERT_EQ(2, TestObject::destructed);
+  }
+
+  ASSERT_EQ(3, TestObject::destructed);
+}
+
+TEST(AutoPtr, getter_Transfers)
+{
+  TestObject::destructed = 0;
+
+  {
+    nsAutoPtr<TestObject> ptr;
+    CreateTestObject(getter_Transfers(ptr));
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+}
+
+TEST(AutoPtr, Casting)
+{
+  // This comparison is always false, as it should be. The extra parens
+  // suppress a -Wunreachable-code warning about printf being unreachable.
+  ASSERT_NE(((void*)(TestObject*)0x1000),
+             ((void*)(TestObjectBaseB*)(TestObject*)0x1000));
+
+  {
+    nsAutoPtr<TestObject> p1(new TestObject());
+    TestObjectBaseB *p2 = p1;
+    ASSERT_NE(static_cast<void*>(p1),
+               static_cast<void*>(p2));
+    ASSERT_EQ(p1, p2);
+    ASSERT_FALSE(p1 != p2);
+    ASSERT_EQ(p2, p1);
+    ASSERT_FALSE(p2 != p1);
+  }
+
+  {
+    TestObject *p1 = new TestObject();
+    nsAutoPtr<TestObjectBaseB> p2(p1);
+    ASSERT_EQ(p1, p2);
+    ASSERT_FALSE(p1 != p2);
+    ASSERT_EQ(p2, p1);
+    ASSERT_FALSE(p2 != p1);
+  }
+}
+
+TEST(AutoPtr, Forget)
+{
+  TestObject::destructed = 0;
+
+  {
+    nsAutoPtr<TestObject> pobj( new TestObject() );
+    nsAutoPtr<TestObject> pobj2( pobj.forget() );
+    ASSERT_EQ(0, TestObject::destructed);
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+}
+
+TEST(AutoPtr, Construction)
+{
+  TestObject::destructed = 0;
+
+  {
+    nsAutoPtr<TestObject> pobj(new TestObject());
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+}
+
+TEST(AutoPtr, ImplicitConversion)
+{
+  // This test is basically successful if it builds. We add a few assertions
+  // to make gtest happy.
+  TestObject::destructed = 0;
+
+  {
+    nsAutoPtr<TestObject> pobj(new TestObject());
+    DoSomethingWithTestObject(pobj);
+    DoSomethingWithConstTestObject(pobj);
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+
+  {
+    nsAutoPtr<TestObject> pobj(new TestObject());
+    DoSomethingWithTestObjectBaseB(pobj);
+    DoSomethingWithConstTestObjectBaseB(pobj);
+  }
+
+  ASSERT_EQ(2, TestObject::destructed);
+
+  {
+    const nsAutoPtr<TestObject> pobj(new TestObject());
+    DoSomethingWithTestObject(pobj);
+    DoSomethingWithConstTestObject(pobj);
+  }
+
+  ASSERT_EQ(3, TestObject::destructed);
+
+  {
+    const nsAutoPtr<TestObject> pobj(new TestObject());
+    DoSomethingWithTestObjectBaseB(pobj);
+    DoSomethingWithConstTestObjectBaseB(pobj);
+  }
+
+  ASSERT_EQ(4, TestObject::destructed);
+}
+
+TEST(AutoPtr, ArrowOperator)
+{
+  // This test is basically successful if it builds. We add a few assertions
+  // to make gtest happy.
+  TestObject::destructed = 0;
+
+  {
+    int test = 1;
+    void (TestObjectBaseA::*fPtr)( int, int*, int& ) = &TestObjectBaseA::MemberFunction;
+    void (TestObjectBaseA::*fVPtr)( int, int*, int& ) = &TestObjectBaseA::VirtualMemberFunction;
+    void (TestObjectBaseA::*fVCPtr)( int, int*, int& ) const = &TestObjectBaseA::VirtualConstMemberFunction;
+    nsAutoPtr<TestObjectBaseA> pobj(new TestObject());
+    (pobj->*fPtr)(test, &test, test);
+    (pobj->*fVPtr)(test, &test, test);
+    (pobj->*fVCPtr)(test, &test, test);
+  }
+
+  ASSERT_EQ(1, TestObject::destructed);
+}