Adds a hy-phen-ator.

content/renderer/hyphenator/hyphenator_unittest.cc

+// Copyright (c) 2012 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.
+
+#include "content/renderer/hyphenator/hyphenator.h"
+
+#include "base/path_service.h"
+#include "base/platform_file.h"
+#include "base/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/hyphen/hyphen.h"
+
+// A unit test for our hyphenator. This class loads a sample hyphenation
+// dictionary and hyphenates words.
+class HyphenatorTest : public testing::Test {
+ public:
+  HyphenatorTest() {
+    Initialize();
+  }
+
+  bool Initialize() {
+    FilePath dictionary_path;
+    if (!PathService::Get(base::DIR_SOURCE_ROOT, &dictionary_path))
+      return false;
+    dictionary_path = dictionary_path.AppendASCII("third_party");
+    dictionary_path = dictionary_path.AppendASCII("hyphen");
+    dictionary_path = dictionary_path.AppendASCII("hyph_en_US.dic");
+    base::PlatformFile file = base::CreatePlatformFile(
+        dictionary_path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
+        NULL, NULL);
+    hyphenator_.reset(new content::Hyphenator(file));
+    return hyphenator_->Initialize();
+  }
+
+  // Creates a human-readable hyphenated word. This function inserts '-'
+  // characters to all places where we can insert hyphens to improve the
+  // readability of this unit test.
+  string16 Hyphenate(const string16& word) {
+    string16 hyphenated_word(word);
+    size_t position = word.length();
+    while (position > 0) {
+      size_t new_position = hyphenator_->ComputeLastHyphenLocation(word,
+                                                                   position);
+      EXPECT_LT(new_position, position);
+      if (new_position > 0)
+        hyphenated_word.insert(new_position, 1, '-');
+      position = new_position;
+    }
+    return hyphenated_word;
+  }
+
+ private:
+  scoped_ptr<content::Hyphenator> hyphenator_;
+};
+
+// Verifies that our hyphenator yields the same hyphenated words as the original
+// hyphen library does.
+TEST_F(HyphenatorTest, HyphenateWords) {
+  static const struct {
+    const char* input;
+    const char* expected;
+  } kTestCases[] = {
+    { "and", "and" },
+    { "concupiscent,", "con-cu-pis-cent," },
+    { "evidence.", "ev-i-dence." },
+    { "first", "first" },
+    { "getting", "get-ting" },
+    { "hedgehog", "hedge-hog" },
+    { "remarkable", "re-mark-able" },
+    { "straightened", "straight-ened" },
+    { "undid", "un-did" },
+    { "were", "were" },
+    { "Simply", "Sim-ply" },
+    { "Undone.", "Un-done." },
+    { "comfortably", "com-fort-ably"},
+    { "declination", "dec-li-na-tion" },
+    { "flamingo:", "flamin-go:" },
+    { "lination", "lina-tion" },
+    { "reciprocity", "rec-i-proc-i-ty" },
+    { "throughout", "through-out" },
+    { "undid", "un-did" },
+    { "undone.", "un-done." },
+    { "unnecessary", "un-nec-es-sary" },
+  };
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTestCases); ++i) {
+    string16 input = ASCIIToUTF16(kTestCases[i].input);
+    string16 expected = ASCIIToUTF16(kTestCases[i].expected);
+    EXPECT_EQ(expected, Hyphenate(input));
+  }
+}