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- // 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/uikit_util.h"
- #import <Foundation/Foundation.h>
- #include <stddef.h>
- #include "testing/platform_test.h"
- namespace {
- typedef PlatformTest UIKitUtilTest;
- TEST_F(UIKitUtilTest, AlignValueToUpperPixel) {
- CGFloat scale = [[UIScreen mainScreen] scale];
- // Pick a few interesting values: already aligned, aligned on retina, and
- // some unaligned values that would round differently. Ensure that all are
- // "integer" values within <1 of the original value in the scaled space.
- CGFloat test_values[] = { 10.0, 55.5, 3.1, 2.9 };
- const CGFloat kMaxAlignDelta = 0.9999;
- size_t value_count = std::size(test_values);
- for (unsigned int i = 0; i < value_count; ++i) {
- CGFloat aligned = ui::AlignValueToUpperPixel(test_values[i]);
- EXPECT_FLOAT_EQ(aligned * scale, floor(aligned * scale));
- EXPECT_NEAR(aligned * scale, test_values[i] * scale, kMaxAlignDelta);
- }
- }
- TEST_F(UIKitUtilTest, AlignSizeToUpperPixel) {
- CGFloat scale = [[UIScreen mainScreen] scale];
- // Pick a few interesting values: already aligned, aligned on retina, and
- // some unaligned values that would round differently. Ensure that all are
- // "integer" values within <1 of the original value in the scaled space.
- CGFloat test_values[] = { 10.0, 55.5, 3.1, 2.9 };
- const CGFloat kMaxAlignDelta = 0.9999;
- size_t value_count = std::size(test_values);
- for (unsigned int i = 0; i < value_count; ++i) {
- CGFloat width = test_values[i];
- CGFloat height = test_values[(i + 1) % value_count];
- CGSize alignedSize = ui::AlignSizeToUpperPixel(CGSizeMake(width, height));
- EXPECT_FLOAT_EQ(floor(alignedSize.width * scale),
- alignedSize.width * scale);
- EXPECT_FLOAT_EQ(floor(alignedSize.height * scale),
- alignedSize.height * scale);
- EXPECT_NEAR(width * scale, alignedSize.width * scale, kMaxAlignDelta);
- EXPECT_NEAR(height * scale, alignedSize.height * scale, kMaxAlignDelta);
- }
- }
- } // namespace
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