[WIP, DONOTCOMMIT] Test case for multi-result spellcheck

components/spellcheck/renderer/spellcheck_unittest2.cc

+// Copyright 2017 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 "components/spellcheck/renderer/spellcheck.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "components/spellcheck/common/spellcheck_result.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+#include "third_party/WebKit/public/platform/WebVector.h"
+#include "third_party/WebKit/public/web/WebTextCheckingResult.h"
+
+class SpellCheckTest : public testing::Test {
+ public:
+  SpellCheckTest() {}
+
+  // Helper function to add a result via UTF8. 'Cause I'm lazy.
+  void AddReplacement(const std::string& replacement) {
+    if (chrome_results_.empty()) {
+      chrome_results_.push_back(SpellCheckResult(
+          SpellCheckResult::SPELLING, 0, replacement.size() + 2,
+          base::UTF8ToUTF16(replacement)));
+    } else {
+      chrome_results_.back().replacements.push_back(
+          base::UTF8ToUTF16(replacement));
+    }
+  }
+
+  std::vector<SpellCheckResult> chrome_results_;
+  SpellCheck spellcheck_;
+};
+
+TEST_F(SpellCheckTest, MultiResultTest) {
+  blink::WebVector<blink::WebTextCheckingResult> blink_results;
+
+  const base::char16 kApostrophe = 0x27;
+  const base::char16 kRightSingleQuotationMark = 0x2019;
+
+  // The text to be checked contains a "typographic" apostrophe.
+  std::string original_text = "mark's";
+  base::string16 typographic_text = base::UTF8ToUTF16(original_text);
+  std::replace(typographic_text.begin(), typographic_text.end(), kApostrophe,
+               kRightSingleQuotationMark);
+
+  // The results contain...
+  // ... a "fixed" version without apostrophe
+  AddReplacement("marks");
+  // ... a version that has just the apostrophe flipped back
+  AddReplacement(original_text);
+  // ... and a completely different word.
+  AddReplacement("markus");
+
+  // Let's test that!
+  spellcheck_.CreateTextCheckingResults(SpellCheck::DO_NOT_MODIFY, 0,
+                                        typographic_text, chrome_results_,
+                                        &blink_results);
+
+  // We expect back two results, the "fixed" non-apostrophe one, and the
+  // different word. The apostrophe flip should be ignored.
+  ASSERT_EQ(1U, blink_results.size());
+  ASSERT_EQ(2U, blink_results[0].replacements.size());
+  // First replacement is left intact.
+  EXPECT_EQ(chrome_results_[0].replacements[0],
+            blink_results[0].replacements[0].Utf16());
+  // Second replacement is skipped, third replacement is left intact.
+  EXPECT_EQ(chrome_results_[0].replacements[2],
+            blink_results[0].replacements[1].Utf16());
+}