Unified callback system.

base/template_util_unittest.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/template_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+namespace {
+
+struct AStruct {};
+class AClass {};
+enum AnEnum {};
+
+class Parent {};
+class Child : public Parent {};
+
+TEST(TemplateUtilTest, IsPointer) {
+  EXPECT_FALSE(is_pointer<int>::value);
+  EXPECT_FALSE(is_pointer<int&>::value);
+  EXPECT_TRUE(is_pointer<int*>::value);
+  EXPECT_TRUE(is_pointer<const int*>::value);
+}
+
+TEST(TemplateUtilTest, IsArray) {
+  EXPECT_FALSE(is_array<int>::value);
+  EXPECT_FALSE(is_array<int*>::value);
+  EXPECT_FALSE(is_array<int(*)[3]>::value);
+  EXPECT_TRUE(is_array<int[]>::value);
+  EXPECT_TRUE(is_array<const int[]>::value);
+  EXPECT_TRUE(is_array<int[3]>::value);
+}
+
+TEST(TemplateUtilTest, IsNonConstReference) {
+  EXPECT_FALSE(is_non_const_reference<int>::value);
+  EXPECT_FALSE(is_non_const_reference<const int&>::value);
+  EXPECT_TRUE(is_non_const_reference<int&>::value);
+}
+
+#if !defined(OS_WIN)
+// TODO(ajwong): Why is is_convertible disabled on windows?
+TEST(TemplateUtilTest, IsConvertible) {
+  // Extra parents needed to make EXPECT_*'s parsing happy. Otherwise,
+  // it sees the equivalent of
+  //
+  //  EXPECT_TRUE( (is_convertible < Child), (Parent > ::value));
+  //
+  // Silly C++.
+  EXPECT_TRUE( (is_convertible<Child, Parent>::value) );
+  EXPECT_FALSE( (is_convertible<Parent, Child>::value) );
+}
+#endif  // !defined(OS_WIN)
+
+TEST(TemplateUtilTest, IsClass) {
+  EXPECT_EQ(true, is_class<AStruct>::value);
+  EXPECT_EQ(true, is_class<AClass>::value);
+
+  EXPECT_EQ(false, is_class<AnEnum>::value);
+  EXPECT_EQ(false, is_class<int>::value);
+  EXPECT_EQ(false, is_class<char*>::value);
+  EXPECT_EQ(false, is_class<int&>::value);
+  EXPECT_EQ(false, is_class<char[3]>::value);
+}
+
+}  // namespace
+}  // namespace base