1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/template_util.h"
6 #include "testing/gtest/include/gtest/gtest.h"
7
8 namespace base {
9 namespace {
10
11 struct AStruct {};
12 class AClass {};
13 enum AnEnum {};
14
15 class Parent {};
16 class Child : public Parent {};
17
TEST(TemplateUtilTest,IsPointer)18 TEST(TemplateUtilTest, IsPointer) {
19 EXPECT_FALSE(is_pointer<int>::value);
20 EXPECT_FALSE(is_pointer<int&>::value);
21 EXPECT_TRUE(is_pointer<int*>::value);
22 EXPECT_TRUE(is_pointer<const int*>::value);
23 }
24
TEST(TemplateUtilTest,IsArray)25 TEST(TemplateUtilTest, IsArray) {
26 EXPECT_FALSE(is_array<int>::value);
27 EXPECT_FALSE(is_array<int*>::value);
28 EXPECT_FALSE(is_array<int(*)[3]>::value);
29 EXPECT_TRUE(is_array<int[]>::value);
30 EXPECT_TRUE(is_array<const int[]>::value);
31 EXPECT_TRUE(is_array<int[3]>::value);
32 }
33
TEST(TemplateUtilTest,IsNonConstReference)34 TEST(TemplateUtilTest, IsNonConstReference) {
35 EXPECT_FALSE(is_non_const_reference<int>::value);
36 EXPECT_FALSE(is_non_const_reference<const int&>::value);
37 EXPECT_TRUE(is_non_const_reference<int&>::value);
38 }
39
TEST(TemplateUtilTest,IsConvertible)40 TEST(TemplateUtilTest, IsConvertible) {
41 // Extra parens needed to make EXPECT_*'s parsing happy. Otherwise,
42 // it sees the equivalent of
43 //
44 // EXPECT_TRUE( (is_convertible < Child), (Parent > ::value));
45 //
46 // Silly C++.
47 EXPECT_TRUE( (is_convertible<Child, Parent>::value) );
48 EXPECT_FALSE( (is_convertible<Parent, Child>::value) );
49 EXPECT_FALSE( (is_convertible<Parent, AStruct>::value) );
50
51 EXPECT_TRUE( (is_convertible<int, double>::value) );
52 EXPECT_TRUE( (is_convertible<int*, void*>::value) );
53 EXPECT_FALSE( (is_convertible<void*, int*>::value) );
54 }
55
TEST(TemplateUtilTest,IsClass)56 TEST(TemplateUtilTest, IsClass) {
57 EXPECT_TRUE(is_class<AStruct>::value);
58 EXPECT_TRUE(is_class<AClass>::value);
59
60 EXPECT_FALSE(is_class<AnEnum>::value);
61 EXPECT_FALSE(is_class<int>::value);
62 EXPECT_FALSE(is_class<char*>::value);
63 EXPECT_FALSE(is_class<int&>::value);
64 EXPECT_FALSE(is_class<char[3]>::value);
65 }
66
67 } // namespace
68 } // namespace base
69