Add sanity checks of the BDIC files to ConvertDictTest....

chrome/tools/convert_dict/convert_dict_unittest.cc

 // Copyright (c) 2010 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 <map>
 #include <string>
 
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/i18n/icu_string_conversions.h"
@@ skipping 96 matching lines @@
 
     // Create BDICT data and verify it.
     hunspell::BDictWriter writer;
     writer.SetComment(aff_reader.comments());
     writer.SetAffixRules(aff_reader.affix_rules());
     writer.SetAffixGroups(aff_reader.GetAffixGroups());
     writer.SetReplacements(aff_reader.replacements());
     writer.SetOtherCommands(aff_reader.other_commands());
     writer.SetWords(dic_reader.words());
 
-    VerifyWords(dic_reader.words(), writer.GetBDict());
+    std::string bdict_data = writer.GetBDict();
+    VerifyWords(dic_reader.words(), bdict_data);
+    EXPECT_TRUE(hunspell::BDict::Verify(bdict_data.data(), bdict_data.size()));
+
+    // Trim the end of this BDICT and verify our verifier tells these trimmed
+    // BDICTs are corrupted.
+    for (size_t i = 1; i < bdict_data.size(); ++i) {
+      SCOPED_TRACE(StringPrintf("i = %" PRIuS, i));
+      EXPECT_FALSE(hunspell::BDict::Verify(bdict_data.data(),
+                                           bdict_data.size() - i));
+    }
   }
 
   // Deletes the temporary files.
   // We need to delete them after the above AffReader and DicReader are deleted
   // since they close the input files in their destructors.
   file_util::Delete(aff_file, false);
   file_util::Delete(dic_file, false);
 }
 
 }  // namespace
@@ skipping 54 matching lines @@
     L"\x00f6\x006e\x00f6\x006b",
     L"\x006d\x0061\x0067\x0075\x006b",
   };
 
   std::map<std::wstring, bool> word_list;
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kWords); ++i)
     word_list.insert(std::make_pair<std::wstring, bool>(kWords[i], true));
 
   RunDictionaryTest(kCodepage, word_list);
 }