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 <Foundation/Foundation.h> 6 7 #include "base/basictypes.h" 8 #include "testing/platform_test.h" 9 #import "ui/ios/uikit_util.h" 10 11 namespace { 12 13 typedef PlatformTest UIKitUtilTest; 14 15 TEST_F(UIKitUtilTest, AlignValueToUpperPixel) { 16 CGFloat scale = [[UIScreen mainScreen] scale]; 17 // Pick a few interesting values: already aligned, aligned on retina, and 18 // some unaligned values that would round differently. Ensure that all are 19 // "integer" values within <1 of the original value in the scaled space. 20 CGFloat test_values[] = { 10.0, 55.5, 3.1, 2.9 }; 21 const CGFloat kMaxAlignDelta = 0.9999; 22 size_t value_count = arraysize(test_values); 23 for (unsigned int i = 0; i < value_count; ++i) { 24 CGFloat aligned = ui::AlignValueToUpperPixel(test_values[i]); 25 EXPECT_FLOAT_EQ(aligned * scale, floor(aligned * scale)); 26 EXPECT_NEAR(aligned * scale, test_values[i] * scale, kMaxAlignDelta); 27 } 28 } 29 30 TEST_F(UIKitUtilTest, AlignSizeToUpperPixel) { 31 CGFloat scale = [[UIScreen mainScreen] scale]; 32 // Pick a few interesting values: already aligned, aligned on retina, and 33 // some unaligned values that would round differently. Ensure that all are 34 // "integer" values within <1 of the original value in the scaled space. 35 CGFloat test_values[] = { 10.0, 55.5, 3.1, 2.9 }; 36 const CGFloat kMaxAlignDelta = 0.9999; 37 size_t value_count = arraysize(test_values); 38 for (unsigned int i = 0; i < value_count; ++i) { 39 CGFloat width = test_values[i]; 40 CGFloat height = test_values[(i + 1) % value_count]; 41 CGSize alignedSize = ui::AlignSizeToUpperPixel(CGSizeMake(width, height)); 42 EXPECT_FLOAT_EQ(floor(alignedSize.width * scale), 43 alignedSize.width * scale); 44 EXPECT_FLOAT_EQ(floor(alignedSize.height * scale), 45 alignedSize.height * scale); 46 EXPECT_NEAR(width * scale, alignedSize.width * scale, kMaxAlignDelta); 47 EXPECT_NEAR(height * scale, alignedSize.height * scale, kMaxAlignDelta); 48 } 49 } 50 51 } // namespace 52
