Upstream Chrome on iOS source code [5/11].

ios/chrome/browser/ui/first_run/first_run_util_unittest.mm

+// 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 <UIKit/UIKit.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "ios/chrome/browser/ui/first_run/first_run_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+TEST(UICommonTest, TestFixOrphanWord) {
+  NSString* englishString =
+      @"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec tempus"
+       " dignissim congue. Morbi pulvinar vitae purus at mollis. Sed laoreet "
+       "euismod neque, eget laoreet nisi porttitor sed.";
+  NSString* englishStringWithOrphan =
+      @"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec tempus"
+       " dignissim congue. Morbi pulvinar vitae purus at mollis. Sed laoreet "
+       "euismod neque, eget laoreet nisi.";
+  // TODO(crbug.com/675342): clang_format does a poor job here. Remove when
+  // fixed in clang_format.
+  // clang-format off
+  NSString* chineseString =
+      @"那只敏捷的棕色狐狸跃过那只懒狗。那只敏捷的棕色狐狸跃过那只懒狗。"
+       "那只敏捷的棕色狐狸跃过那只懒狗。那只敏捷的棕色狐狸跃过那只懒狗。"
+       "那只敏捷的棕色狐狸跃过那只懒狗。那只敏捷的棕色狐狸跃过那只懒狗。";
+  NSString* chineseStringWithOrphan =
+      @"那只敏捷的棕色狐狸跃过那只懒狗。那只敏捷的棕色狐狸跃过那只懒狗。"
+       "那只敏捷的棕色狐狸跃过那只懒狗。快速狐狸";
+  // clang-format on
+
+  base::scoped_nsobject<UILabel> label(
+      [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 500)]);
+  [label setText:englishString];
+  ios_internal::FixOrphanWord(label);
+  NSRange range = [[label text] rangeOfString:@"\n"];
+  // Check that the label's text does not contain a newline.
+  EXPECT_EQ(NSNotFound, static_cast<NSInteger>(range.location));
+
+  [label setText:englishStringWithOrphan];
+  ios_internal::FixOrphanWord(label);
+  range = [[label text] rangeOfString:@"\n"];
+  // Check that the label's text contains a newline.
+  EXPECT_NE(NSNotFound, static_cast<NSInteger>(range.location));
+
+  // Check the words after the newline.
+  NSString* wordsAfterNewline =
+      [[label text] substringFromIndex:(range.location + range.length)];
+  EXPECT_TRUE([@"laoreet nisi." isEqualToString:wordsAfterNewline]);
+
+  [label setText:chineseString];
+  ios_internal::FixOrphanWord(label);
+  range = [[label text] rangeOfString:@"\n"];
+  // Check that the label's text does not contain a newline.
+  EXPECT_EQ(NSNotFound, static_cast<NSInteger>(range.location));
+
+  [label setText:chineseStringWithOrphan];
+  ios_internal::FixOrphanWord(label);
+  range = [[label text] rangeOfString:@"\n"];
+  // Check that the label's text contains a newline.
+  ASSERT_NE(NSNotFound, static_cast<NSInteger>(range.location));
+
+  // Check the words after the newline.
+  wordsAfterNewline =
+      [[label text] substringFromIndex:(range.location + range.length)];
+  EXPECT_TRUE([@"快速狐狸" isEqualToString:wordsAfterNewline]);
+}
+}