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-rw-r--r--mfbt/tests/TestRefPtr.cpp131
1 files changed, 131 insertions, 0 deletions
diff --git a/mfbt/tests/TestRefPtr.cpp b/mfbt/tests/TestRefPtr.cpp
new file mode 100644
index 0000000000..972e284c44
--- /dev/null
+++ b/mfbt/tests/TestRefPtr.cpp
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "mozilla/RefPtr.h"
+#include "mozilla/RefCounted.h"
+
+#include <type_traits>
+
+using mozilla::RefCounted;
+
+class Foo : public RefCounted<Foo> {
+ public:
+ MOZ_DECLARE_REFCOUNTED_TYPENAME(Foo)
+
+ Foo() : mDead(false) {}
+
+ static int sNumDestroyed;
+
+ ~Foo() {
+ MOZ_ASSERT(!mDead);
+ mDead = true;
+ sNumDestroyed++;
+ }
+
+ private:
+ bool mDead;
+};
+int Foo::sNumDestroyed;
+
+struct Bar : public Foo {};
+
+already_AddRefed<Foo> NewFoo() {
+ RefPtr<Foo> f(new Foo());
+ return f.forget();
+}
+
+already_AddRefed<Foo> NewBar() {
+ RefPtr<Bar> bar = new Bar();
+ return bar.forget();
+}
+
+void GetNewFoo(Foo** aFoo) {
+ *aFoo = new Bar();
+ // Kids, don't try this at home
+ (*aFoo)->AddRef();
+}
+
+void GetNewFoo(RefPtr<Foo>* aFoo) { *aFoo = new Bar(); }
+
+already_AddRefed<Foo> GetNullFoo() { return 0; }
+
+int main() {
+ MOZ_RELEASE_ASSERT(0 == Foo::sNumDestroyed);
+ {
+ RefPtr<Foo> f = new Foo();
+ MOZ_RELEASE_ASSERT(f->refCount() == 1);
+ }
+ MOZ_RELEASE_ASSERT(1 == Foo::sNumDestroyed);
+
+ {
+ RefPtr f1 = NewFoo();
+ static_assert(std::is_same_v<decltype(f1), RefPtr<Foo>>);
+ RefPtr f2(NewFoo());
+ static_assert(std::is_same_v<decltype(f2), RefPtr<Foo>>);
+ MOZ_RELEASE_ASSERT(1 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(3 == Foo::sNumDestroyed);
+
+ {
+ RefPtr<Foo> b = NewBar();
+ MOZ_RELEASE_ASSERT(3 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed);
+
+ {
+ RefPtr<Foo> f1;
+ {
+ f1 = new Foo();
+ RefPtr<Foo> f2(f1);
+ RefPtr<Foo> f3 = f2;
+ MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(5 == Foo::sNumDestroyed);
+
+ {
+ {
+ RefPtr<Foo> f = new Foo();
+ RefPtr<Foo> g = f.forget();
+ }
+ MOZ_RELEASE_ASSERT(6 == Foo::sNumDestroyed);
+ }
+
+ {
+ RefPtr<Foo> f = new Foo();
+ GetNewFoo(getter_AddRefs(f));
+ MOZ_RELEASE_ASSERT(7 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(8 == Foo::sNumDestroyed);
+
+ {
+ RefPtr<Foo> f = new Foo();
+ GetNewFoo(&f);
+ MOZ_RELEASE_ASSERT(9 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(10 == Foo::sNumDestroyed);
+
+ { RefPtr<Foo> f1 = new Bar(); }
+ MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed);
+
+ {
+ RefPtr f = GetNullFoo();
+ static_assert(std::is_same_v<decltype(f), RefPtr<Foo>>);
+ MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed);
+ }
+ MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed);
+
+ {
+ bool condition = true;
+ const auto f =
+ condition ? mozilla::MakeRefPtr<Bar>() : mozilla::MakeRefPtr<Foo>();
+
+ MOZ_RELEASE_ASSERT(f);
+ }
+
+ return 0;
+}