Add a unit test for Hunspell spellcheck

chrome/renderer/spellchecker/spellcheck_unittest.cc

Index: chrome/renderer/spellchecker/spellcheck_unittest.cc
diff --git a/chrome/renderer/spellchecker/spellcheck_unittest.cc b/chrome/renderer/spellchecker/spellcheck_unittest.cc
index 8a443a63b63d18cd0f1c2b69e792dfd32fca12eb..f5a8dc19b442b614c9726ab56b5823e304028911 100644
--- a/chrome/renderer/spellchecker/spellcheck_unittest.cc
+++ b/chrome/renderer/spellchecker/spellcheck_unittest.cc
@@ -1326,3 +1326,30 @@ TEST_F(SpellCheckTest, SpellingEngine_CheckSpelling) {
   }
 }
 
+// Chrome should not suggest "Othello" for "hellllo" or "identically" for
+// "accidently".
+TEST_F(SpellCheckTest, LogicalSuggestions) {

[groby-ooo-7-16, 2013/02/27 00:51:29]

Grumble. This should technically test hunspell, not SpellCheck. (I know, we're
doing this a lot. Still, at some point I'd like hunspell checks)

+  static const struct {
+    const char* misspelled;
+    const char* suggestion;
+  } kTestCases[] = {
+    { "hellllo", "hello" },
+    { "accidently", "accidentally" }
+  };
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTestCases); ++i) {
+    int misspelling_start = 0;
+    int misspelling_length = 0;
+    std::vector<string16> suggestions;
+    EXPECT_FALSE(spell_check()->SpellCheckWord(
+        ASCIIToUTF16(kTestCases[i].misspelled).c_str(),
+        strlen(kTestCases[i].misspelled),
+        0,
+        &misspelling_start,
+        &misspelling_length,
+        &suggestions));
+    EXPECT_GE(suggestions.size(), static_cast<size_t>(1));
+    if (suggestions.size() > 0)
+      EXPECT_EQ(suggestions[0], ASCIIToUTF16(kTestCases[i].suggestion));
+  }
+}