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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 <Foundation/Foundation.h>
#include <stddef.h>
#include "base/macros.h"
#include "testing/platform_test.h"
#import "ui/gfx/ios/uikit_util.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 = arraysize(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 = arraysize(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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