Add a data-driven unit test to validate autofill profile merging during aggregation.

chrome/browser/autofill/data_driven_test.h

Index: chrome/browser/autofill/data_driven_test.h
diff --git a/chrome/browser/autofill/data_driven_test.h b/chrome/browser/autofill/data_driven_test.h
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+++ b/chrome/browser/autofill/data_driven_test.h
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+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_AUTOFILL_DATA_DRIVEN_TEST_H_
+#define CHROME_BROWSER_AUTOFILL_DATA_DRIVEN_TEST_H_
+#pragma once
+
+#include <string>
+
+#include "base/file_path.h"
+#include "base/string16.h"
+
+// A convenience class for implementing data-driven tests. Subclassers need only
+// implement the conversion of serialized input data to serialized output data
+// and provide a set of input files. For each input file, on the first run, a
+// gold output file is generated; for subsequent runs, the test ouptut is
+// compared to this gold output.
+class DataDrivenTest {
+ public:
+  // For each file in |input_directory| whose filename matches
+  // |file_name_pattern|, slurps in the file contents and calls into
+  // |GenerateResults()|. If the corresponding output file already exists in
+  // the |output_directory|, verifies that the results match the file contents;
+  // otherwise, writes a gold result file to the |output_directory|.
+  void RunDataDrivenTest(const FilePath& input_directory,
+                         const FilePath& output_directory,
+                         const FilePath::StringType& file_name_pattern);
+
+  // Given the |input| data, generates the |output| results. The output results
+  // must be stable across runs.
+  // Note: The return type is |void| so that googletest |ASSERT_*| macros will
+  // compile.
+  virtual void GenerateResults(const std::string& input,
+                               std::string* output) = 0;
+
+  // Return |FilePath|s to the test input and output subdirectories
+  // ../autofill/|test_name|/input and ../autofill/|test_name|/output.
+  FilePath GetInputDirectory(const FilePath::StringType& test_name);
+  FilePath GetOutputDirectory(const FilePath::StringType& test_name);
+
+ protected:
+  DataDrivenTest();
+  virtual ~DataDrivenTest();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DataDrivenTest);
+};
+
+#endif  // CHROME_BROWSER_AUTOFILL_DATA_DRIVEN_TEST_H_