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"
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) {
30 [UIFont systemFontOfSize:16],
31 [UIFont boldSystemFontOfSize:10],
32 [UIFont fontWithName:@"Helvetica" size:12.0],
38 @"★ This is a test string that is very long.",
41 [NSValue valueWithCGSize:CGSizeMake(20, 100)],
42 [NSValue valueWithCGSize:CGSizeMake(100, 100)],
43 [NSValue valueWithCGSize:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)],
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;
66 TEST_F(NSStringCrStringDrawing, SizeWithFont) {
69 [UIFont systemFontOfSize:16],
70 [UIFont boldSystemFontOfSize:10],
71 [UIFont fontWithName:@"Helvetica" size:12.0],
73 for (UIFont* font in fonts) {
74 if ([font isEqual:[NSNull null]])
76 std::string font_tag = "with font ";
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;
98 #pragma clang diagnostic pop // ignored "-Wdeprecated-declarations"
100 TEST_F(NSStringCrStringDrawing, PixelAlignedSizeWithFont) {
102 [UIFont systemFontOfSize:16],
103 [UIFont boldSystemFontOfSize:10],
104 [UIFont fontWithName:@"Helvetica" size:12.0],
106 NSArray* strings = @[
110 @"★ This is a test string that is very long.",
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-
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,
138 EXPECT_NEAR(size_with_attributes.height * scale,
139 size_with_pixel_aligned.height * scale,
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;