Revert of [Android WebView] Synthesize a fake page loading event on page source modif...
[chromium-blink-merge.git] / ui / ios / NSString+CrStringDrawing_unittest.mm
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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 #import "ui/ios/NSString+CrStringDrawing.h"
6 #include "base/mac/scoped_nsobject.h"
7 #include "base/strings/stringprintf.h"
8 #include "base/strings/sys_string_conversions.h"
9 #include "testing/gtest/include/gtest/gtest.h"
10 #include "testing/platform_test.h"
12 namespace {
14 typedef PlatformTest NSStringCrStringDrawing;
16 // These tests verify that the category methods return the same values as the
17 // deprecated methods, so ignore warnings about using deprecated methods.
18 #pragma clang diagnostic push
19 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
21 // Verifies that |cr_boundingSizeWithSize| returns the same size as the
22 // deprecated |sizeWithFont:constrainedToSize| for most values.
23 // Note that the methods return different values in a few cases (so they are not
24 // included in the test cases):
25 //  - the constrained size.width is less than a character.
26 //  - the constrained size.height is less than the font height.
27 //  - the string is empty.
28 TEST_F(NSStringCrStringDrawing, BoundingSizeWithSize) {
29   NSArray* fonts = @[
30     [UIFont systemFontOfSize:16],
31     [UIFont boldSystemFontOfSize:10],
32     [UIFont fontWithName:@"Helvetica" size:12.0],
33   ];
34   NSArray* strings = @[
35     @"Test",
36     @"multi word test",
37     @"你好",
38     @"★ This is a test string that is very long.",
39   ];
40   NSArray* sizes = @[
41     [NSValue valueWithCGSize:CGSizeMake(20, 100)],
42     [NSValue valueWithCGSize:CGSizeMake(100, 100)],
43     [NSValue valueWithCGSize:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)],
44   ];
45   for (UIFont* font in fonts) {
46     for (NSString* string in strings) {
47       for (NSValue* sizeValue in sizes) {
48         CGSize test_size = [sizeValue CGSizeValue];
49         std::string test_tag = base::StringPrintf(
50             "for string '%s' with font %s and size %s",
51             base::SysNSStringToUTF8(string).c_str(),
52             base::SysNSStringToUTF8([font description]).c_str(),
53             base::SysNSStringToUTF8(NSStringFromCGSize(test_size)).c_str());
55         CGSize size_with_font =
56             [string sizeWithFont:font constrainedToSize:test_size];
57         CGSize bounding_size =
58             [string cr_boundingSizeWithSize:test_size font:font];
59         EXPECT_EQ(size_with_font.width, bounding_size.width) << test_tag;
60         EXPECT_EQ(size_with_font.height, bounding_size.height) << test_tag;
61       }
62     }
63   }
66 TEST_F(NSStringCrStringDrawing, SizeWithFont) {
67   NSArray* fonts = @[
68     [NSNull null],
69     [UIFont systemFontOfSize:16],
70     [UIFont boldSystemFontOfSize:10],
71     [UIFont fontWithName:@"Helvetica" size:12.0],
72   ];
73   for (UIFont* font in fonts) {
74     if ([font isEqual:[NSNull null]])
75       font = nil;
76     std::string font_tag = "with font ";
77     font_tag.append(
78         base::SysNSStringToUTF8(font ? [font description] : @"nil"));
79     EXPECT_EQ([@"" sizeWithFont:font].width,
80               [@"" cr_sizeWithFont:font].width) << font_tag;
81     EXPECT_EQ([@"" sizeWithFont:font].height,
82               [@"" cr_sizeWithFont:font].height) << font_tag;
83     EXPECT_EQ([@"Test" sizeWithFont:font].width,
84               [@"Test" cr_sizeWithFont:font].width) << font_tag;
85     EXPECT_EQ([@"Test" sizeWithFont:font].height,
86               [@"Test" cr_sizeWithFont:font].height) << font_tag;
87     EXPECT_EQ([@"你好" sizeWithFont:font].width,
88               [@"你好" cr_sizeWithFont:font].width) << font_tag;
89     EXPECT_EQ([@"你好" sizeWithFont:font].height,
90               [@"你好" cr_sizeWithFont:font].height) << font_tag;
91     NSString* long_string = @"★ This is a test string that is very long.";
92     EXPECT_EQ([long_string sizeWithFont:font].width,
93               [long_string cr_sizeWithFont:font].width) << font_tag;
94     EXPECT_EQ([long_string sizeWithFont:font].height,
95               [long_string cr_sizeWithFont:font].height) << font_tag;
96   }
98 #pragma clang diagnostic pop  // ignored "-Wdeprecated-declarations"
100 TEST_F(NSStringCrStringDrawing, PixelAlignedSizeWithFont) {
101   NSArray* fonts = @[
102     [UIFont systemFontOfSize:16],
103     [UIFont boldSystemFontOfSize:10],
104     [UIFont fontWithName:@"Helvetica" size:12.0],
105   ];
106   NSArray* strings = @[
107     @"",
108     @"Test",
109     @"你好",
110     @"★ This is a test string that is very long.",
111   ];
112   for (UIFont* font in fonts) {
113     NSDictionary* attributes = @{ NSFontAttributeName : font };
115     for (NSString* string in strings) {
116       std::string test_tag = base::StringPrintf("for string '%s' with font %s",
117           base::SysNSStringToUTF8(string).c_str(),
118           base::SysNSStringToUTF8([font description]).c_str());
120       CGSize size_with_attributes = [string sizeWithAttributes:attributes];
121       CGSize size_with_pixel_aligned =
122           [string cr_pixelAlignedSizeWithFont:font];
124       // Verify that the pixel_aligned size is always rounded up (i.e. the size
125       // returned from sizeWithAttributes: is less than or equal to the pixel-
126       // aligned size).
127       EXPECT_LE(size_with_attributes.width,
128                 size_with_pixel_aligned.width) << test_tag;
129       EXPECT_LE(size_with_attributes.height,
130                 size_with_pixel_aligned.height) << test_tag;
132       // Verify that the pixel_aligned size is never more than a pixel different
133       // than the size returned from sizeWithAttributes:.
134       static CGFloat scale = [[UIScreen mainScreen] scale];
135       EXPECT_NEAR(size_with_attributes.width * scale,
136                   size_with_pixel_aligned.width * scale,
137                   0.9999) << test_tag;
138       EXPECT_NEAR(size_with_attributes.height * scale,
139                   size_with_pixel_aligned.height * scale,
140                   0.9999) << test_tag;
142       // Verify that the pixel-aligned value is pixel-aligned.
143       EXPECT_FLOAT_EQ(roundf(size_with_pixel_aligned.width * scale),
144                       size_with_pixel_aligned.width * scale) << test_tag;
145       EXPECT_FLOAT_EQ(roundf(size_with_pixel_aligned.height * scale),
146                       size_with_pixel_aligned.height * scale) << test_tag;
147     }
148   }
151 }  // namespace