blob: b33a89576f3ba127ecf0404662b9a8fd6e258f3d [file] [log] [blame]
// Copyright 2014 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.
#import "ui/gfx/ios/NSString+CrStringDrawing.h"
#include "base/mac/scoped_nsobject.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/gtest_mac.h"
#include "testing/platform_test.h"
namespace {
typedef PlatformTest NSStringCrStringDrawing;
// These tests verify that the category methods return the same values as the
// deprecated methods, so ignore warnings about using deprecated methods.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
// Verifies that |cr_boundingSizeWithSize| returns the same size as the
// deprecated |sizeWithFont:constrainedToSize| for most values.
// Note that the methods return different values in a few cases (so they are not
// included in the test cases):
// - the constrained size.width is less than a character.
// - the constrained size.height is less than the font height.
// - the string is empty.
TEST_F(NSStringCrStringDrawing, BoundingSizeWithSize) {
NSArray* fonts = @[
[UIFont systemFontOfSize:16],
[UIFont boldSystemFontOfSize:10],
[UIFont fontWithName:@"Helvetica" size:12.0],
NSArray* strings = @[
@"multi word test",
@"★ This is a test string that is very long.",
NSArray* sizes = @[
[NSValue valueWithCGSize:CGSizeMake(20, 100)],
[NSValue valueWithCGSize:CGSizeMake(100, 100)],
[NSValue valueWithCGSize:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)],
for (UIFont* font in fonts) {
for (NSString* string in strings) {
for (NSValue* sizeValue in sizes) {
CGSize test_size = [sizeValue CGSizeValue];
std::string test_tag = base::StringPrintf(
"for string '%s' with font %s and size %s",
base::SysNSStringToUTF8([font description]).c_str(),
CGSize size_with_font =
[string sizeWithFont:font constrainedToSize:test_size];
CGSize bounding_size =
[string cr_boundingSizeWithSize:test_size font:font];
EXPECT_EQ(size_with_font.width, bounding_size.width) << test_tag;
EXPECT_EQ(size_with_font.height, bounding_size.height) << test_tag;
TEST_F(NSStringCrStringDrawing, SizeWithFont) {
NSArray* fonts = @[
[NSNull null],
[UIFont systemFontOfSize:16],
[UIFont boldSystemFontOfSize:10],
[UIFont fontWithName:@"Helvetica" size:12.0],
for (UIFont* font in fonts) {
if ([font isEqual:[NSNull null]])
font = nil;
std::string font_tag = "with font ";
base::SysNSStringToUTF8(font ? [font description] : @"nil"));
EXPECT_EQ([@"" sizeWithFont:font].width,
[@"" cr_sizeWithFont:font].width) << font_tag;
EXPECT_EQ([@"" sizeWithFont:font].height,
[@"" cr_sizeWithFont:font].height) << font_tag;
EXPECT_EQ([@"Test" sizeWithFont:font].width,
[@"Test" cr_sizeWithFont:font].width) << font_tag;
EXPECT_EQ([@"Test" sizeWithFont:font].height,
[@"Test" cr_sizeWithFont:font].height) << font_tag;
EXPECT_EQ([@"你好" sizeWithFont:font].width,
[@"你好" cr_sizeWithFont:font].width) << font_tag;
EXPECT_EQ([@"你好" sizeWithFont:font].height,
[@"你好" cr_sizeWithFont:font].height) << font_tag;
NSString* long_string = @"★ This is a test string that is very long.";
EXPECT_EQ([long_string sizeWithFont:font].width,
[long_string cr_sizeWithFont:font].width) << font_tag;
EXPECT_EQ([long_string sizeWithFont:font].height,
[long_string cr_sizeWithFont:font].height) << font_tag;
#pragma clang diagnostic pop // ignored "-Wdeprecated-declarations"
TEST_F(NSStringCrStringDrawing, PixelAlignedSizeWithFont) {
NSArray* fonts = @[
[UIFont systemFontOfSize:16],
[UIFont boldSystemFontOfSize:10],
[UIFont fontWithName:@"Helvetica" size:12.0],
NSArray* strings = @[
@"★ This is a test string that is very long.",
for (UIFont* font in fonts) {
NSDictionary* attributes = @{ NSFontAttributeName : font };
for (NSString* string in strings) {
std::string test_tag = base::StringPrintf("for string '%s' with font %s",
base::SysNSStringToUTF8([font description]).c_str());
CGSize size_with_attributes = [string sizeWithAttributes:attributes];
CGSize size_with_pixel_aligned =
[string cr_pixelAlignedSizeWithFont:font];
// Verify that the pixel_aligned size is always rounded up (i.e. the size
// returned from sizeWithAttributes: is less than or equal to the pixel-
// aligned size).
size_with_pixel_aligned.width) << test_tag;
size_with_pixel_aligned.height) << test_tag;
// Verify that the pixel_aligned size is never more than a pixel different
// than the size returned from sizeWithAttributes:.
static CGFloat scale = [[UIScreen mainScreen] scale];
EXPECT_NEAR(size_with_attributes.width * scale,
size_with_pixel_aligned.width * scale,
0.9999) << test_tag;
EXPECT_NEAR(size_with_attributes.height * scale,
size_with_pixel_aligned.height * scale,
0.9999) << test_tag;
// Verify that the pixel-aligned value is pixel-aligned.
EXPECT_FLOAT_EQ(roundf(size_with_pixel_aligned.width * scale),
size_with_pixel_aligned.width * scale) << test_tag;
EXPECT_FLOAT_EQ(roundf(size_with_pixel_aligned.height * scale),
size_with_pixel_aligned.height * scale) << test_tag;
TEST_F(NSStringCrStringDrawing, CutString) {
EXPECT_NSEQ(@"foo", [@"foo" cr_stringByCuttingToIndex:4]);
EXPECT_NSEQ(@"bar", [@"bar" cr_stringByCuttingToIndex:3]);
EXPECT_NSEQ(@"f…", [@"foo" cr_stringByCuttingToIndex:2]);
EXPECT_NSEQ(@"…", [@"bar" cr_stringByCuttingToIndex:1]);
EXPECT_NSEQ(@"", [@"foo" cr_stringByCuttingToIndex:0]);
TEST_F(NSStringCrStringDrawing, ElideStringToFitInRect) {
NSString* result =
[@"lorem ipsum dolores" cr_stringByElidingToFitSize:CGSizeZero];
EXPECT_NSEQ(@"", result);
result = [@"lorem ipsum dolores"
cr_stringByElidingToFitSize:CGSizeMake(1000, 1000)];
EXPECT_NSEQ(@"lorem ipsum dolores", result);
result =
[@"lorem ipsum dolores" cr_stringByElidingToFitSize:CGSizeMake(30, 50)];
EXPECT_TRUE([@"lorem ipsum dolores" length] > [result length]);
} // namespace