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| 1 // Copyright 2014 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 #import "base/mac/scoped_objc_class_swizzler.h" | |
| 6 | |
| 7 #import "base/mac/scoped_nsobject.h" | |
| 8 #include "testing/gtest/include/gtest/gtest.h" | |
| 9 | |
| 10 @interface ObjCClassSwizzlerTestOne : NSObject | |
| 11 + (NSInteger)function; | |
| 12 - (NSInteger)method; | |
| 13 - (NSInteger)modifier; | |
| 14 @end | |
| 15 | |
| 16 @interface ObjCClassSwizzlerTestTwo : NSObject | |
| 17 + (NSInteger)function; | |
| 18 - (NSInteger)method; | |
| 19 - (NSInteger)modifier; | |
| 20 @end | |
| 21 | |
| 22 @implementation ObjCClassSwizzlerTestOne : NSObject | |
| 23 | |
| 24 + (NSInteger)function { | |
| 25 return 10; | |
| 26 } | |
| 27 | |
| 28 - (NSInteger)method { | |
| 29 // Multiply by a modifier to ensure |self| in a swizzled implementation | |
| 30 // refers to the original object. | |
| 31 return 1 * [self modifier]; | |
| 32 } | |
| 33 | |
| 34 - (NSInteger)modifier { | |
| 35 return 3; | |
| 36 } | |
| 37 | |
| 38 @end | |
| 39 | |
| 40 @implementation ObjCClassSwizzlerTestTwo : NSObject | |
| 41 | |
| 42 + (NSInteger)function { | |
| 43 return 20; | |
| 44 } | |
| 45 | |
| 46 - (NSInteger)method { | |
| 47 return 2 * [self modifier]; | |
| 48 } | |
| 49 | |
| 50 - (NSInteger)modifier { | |
| 51 return 7; | |
| 52 } | |
| 53 | |
| 54 @end | |
| 55 | |
| 56 @interface ObjCClassSwizzlerTestOne (AlternateCategory) | |
| 57 - (NSInteger)alternate; | |
| 58 @end | |
| 59 | |
| 60 @implementation ObjCClassSwizzlerTestOne (AlternateCategory) | |
| 61 - (NSInteger)alternate { | |
| 62 return 3 * [self modifier]; | |
| 63 } | |
| 64 @end | |
| 65 | |
| 66 @interface ObjCClassSwizzlerTestOneChild : ObjCClassSwizzlerTestOne | |
| 67 - (NSInteger)childAlternate; | |
| 68 @end | |
| 69 | |
| 70 @implementation ObjCClassSwizzlerTestOneChild | |
| 71 - (NSInteger)childAlternate { | |
| 72 return 5 * [self modifier]; | |
| 73 } | |
| 74 @end | |
| 75 | |
| 76 namespace base { | |
| 77 namespace mac { | |
| 78 | |
| 79 TEST(ObjCClassSwizzlerTest, SwizzleInstanceMethods) { | |
| 80 base::scoped_nsobject<ObjCClassSwizzlerTestOne> object_one( | |
| 81 [[ObjCClassSwizzlerTestOne alloc] init]); | |
| 82 base::scoped_nsobject<ObjCClassSwizzlerTestTwo> object_two( | |
| 83 [[ObjCClassSwizzlerTestTwo alloc] init]); | |
| 84 EXPECT_EQ(3, [object_one method]); | |
| 85 EXPECT_EQ(14, [object_two method]); | |
| 86 | |
| 87 { | |
| 88 base::mac::ScopedObjCClassSwizzler swizzler( | |
| 89 [ObjCClassSwizzlerTestOne class], | |
| 90 [ObjCClassSwizzlerTestTwo class], | |
| 91 @selector(method)); | |
| 92 EXPECT_EQ(6, [object_one method]); | |
| 93 EXPECT_EQ(7, [object_two method]); | |
| 94 | |
| 95 IMP original = swizzler.GetOriginalImplementation(); | |
| 96 id expected_result = reinterpret_cast<id>(3); | |
| 97 EXPECT_EQ(expected_result, original(object_one, @selector(method))); | |
| 98 } | |
| 99 | |
| 100 EXPECT_EQ(3, [object_one method]); | |
| 101 EXPECT_EQ(14, [object_two method]); | |
| 102 } | |
| 103 | |
| 104 TEST(ObjCClassSwizzlerTest, SwizzleClassMethods) { | |
| 105 EXPECT_EQ(10, [ObjCClassSwizzlerTestOne function]); | |
| 106 EXPECT_EQ(20, [ObjCClassSwizzlerTestTwo function]); | |
| 107 | |
| 108 { | |
| 109 base::mac::ScopedObjCClassSwizzler swizzler( | |
| 110 [ObjCClassSwizzlerTestOne class], | |
| 111 [ObjCClassSwizzlerTestTwo class], | |
| 112 @selector(function)); | |
| 113 EXPECT_EQ(20, [ObjCClassSwizzlerTestOne function]); | |
| 114 EXPECT_EQ(10, [ObjCClassSwizzlerTestTwo function]); | |
| 115 | |
| 116 IMP original = swizzler.GetOriginalImplementation(); | |
| 117 id expected_result = reinterpret_cast<id>(10); | |
| 118 EXPECT_EQ(expected_result, original(nil, @selector(function))); | |
| 119 } | |
| 120 | |
| 121 EXPECT_EQ(10, [ObjCClassSwizzlerTestOne function]); | |
| 122 EXPECT_EQ(20, [ObjCClassSwizzlerTestTwo function]); | |
| 123 } | |
| 124 | |
| 125 TEST(ObjCClassSwizzlerTest, SwizzleViaCategory) { | |
| 126 base::scoped_nsobject<ObjCClassSwizzlerTestOne> object_one( | |
| 127 [[ObjCClassSwizzlerTestOne alloc] init]); | |
| 128 EXPECT_EQ(3, [object_one method]); | |
| 129 | |
| 130 { | |
| 131 base::mac::ScopedObjCClassSwizzler swizzler( | |
| 132 [ObjCClassSwizzlerTestOne class], | |
| 133 @selector(method), | |
| 134 @selector(alternate)); | |
| 135 EXPECT_EQ(9, [object_one method]); | |
| 136 | |
| 137 IMP original = swizzler.GetOriginalImplementation(); | |
| 138 id expected_result = reinterpret_cast<id>(3); | |
| 139 EXPECT_EQ(expected_result, original(object_one, @selector(method))); | |
| 140 } | |
| 141 | |
| 142 EXPECT_EQ(3, [object_one method]); | |
| 143 } | |
| 144 | |
| 145 TEST(ObjCClassSwizzlerTest, SwizzleViaInheritance) { | |
| 146 base::scoped_nsobject<ObjCClassSwizzlerTestOneChild> child( | |
| 147 [[ObjCClassSwizzlerTestOneChild alloc] init]); | |
| 148 EXPECT_EQ(3, [child method]); | |
| 149 | |
| 150 { | |
| 151 base::mac::ScopedObjCClassSwizzler swizzler( | |
| 152 [ObjCClassSwizzlerTestOneChild class], | |
| 153 @selector(method), | |
| 154 @selector(childAlternate)); | |
| 155 EXPECT_EQ(15, [child method]); | |
| 156 | |
| 157 IMP original = swizzler.GetOriginalImplementation(); | |
| 158 id expected_result = reinterpret_cast<id>(3); | |
| 159 EXPECT_EQ(expected_result, original(child, @selector(method))); | |
| 160 } | |
| 161 | |
| 162 EXPECT_EQ(3, [child method]); | |
| 163 } | |
| 164 | |
| 165 } // namespace mac | |
| 166 } // namespace base | |
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