Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/util/core_text_util_unittest.mm

Index: ios/chrome/browser/ui/util/core_text_util_unittest.mm
diff --git a/ios/chrome/browser/ui/util/core_text_util_unittest.mm b/ios/chrome/browser/ui/util/core_text_util_unittest.mm
new file mode 100644
index 0000000000000000000000000000000000000000..30e281fa1c132a078bbc94364bc34307c2345f0d
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+++ b/ios/chrome/browser/ui/util/core_text_util_unittest.mm
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+// Copyright 2016 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 "ios/chrome/browser/ui/util/core_text_util.h"
+
+#import "base/mac/scoped_nsobject.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest_mac.h"
+#include "testing/platform_test.h"
+
+namespace {
+
+// TODO(crbug.com/601772): Add tests for other core_text_util tests.
+
+// Tests that the minimum line height attribute is reflected in GetLineHeight().
+TEST(CoreTextUtilTest, MinLineHeightText) {
+  CGFloat min_line_height = 30.0;
+  base::scoped_nsobject<NSMutableParagraphStyle> style(
+      [[NSMutableParagraphStyle alloc] init]);
+  [style setMinimumLineHeight:min_line_height];
+  base::scoped_nsobject<NSMutableAttributedString> str(
+      [[NSMutableAttributedString alloc]
+          initWithString:@"test"
+              attributes:@{NSParagraphStyleAttributeName : style}]);
+  ASSERT_EQ(min_line_height,
+            core_text_util::GetLineHeight(str, NSMakeRange(0, [str length])));
+}
+
+// Tests that the maximum line height attribute is reflected in GetLineHeight().
+TEST(CoreTextUtilTest, MaxLineHeightText) {
+  CGFloat max_line_height = 10.0;
+  base::scoped_nsobject<NSMutableParagraphStyle> style(
+      [[NSMutableParagraphStyle alloc] init]);
+  [style setMaximumLineHeight:max_line_height];
+  base::scoped_nsobject<NSMutableAttributedString> str(
+      [[NSMutableAttributedString alloc]
+          initWithString:@"test"
+              attributes:@{NSParagraphStyleAttributeName : style}]);
+  ASSERT_EQ(max_line_height,
+            core_text_util::GetLineHeight(str, NSMakeRange(0, [str length])));
+}
+
+// Tests that the line height multiple attribute is reflected in
+// GetLineHeight().
+TEST(CoreTextUtilTest, LineHeightMultipleTest) {
+  UIFont* font = [UIFont systemFontOfSize:20.0];
+  CGFloat font_line_height = font.ascender - font.descender;
+  CGFloat line_height_multiple = 2.0;
+  base::scoped_nsobject<NSMutableParagraphStyle> style(
+      [[NSMutableParagraphStyle alloc] init]);
+  [style setLineHeightMultiple:line_height_multiple];
+  base::scoped_nsobject<NSMutableAttributedString> str(
+      [[NSMutableAttributedString alloc]
+          initWithString:@"test"
+              attributes:@{
+                NSParagraphStyleAttributeName : style,
+                NSFontAttributeName : font
+              }]);
+  ASSERT_EQ(font_line_height * line_height_multiple,
+            core_text_util::GetLineHeight(str, NSMakeRange(0, [str length])));
+}
+
+}  // namespace