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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_TEST_UTILS_H_
      6 #define CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_TEST_UTILS_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/macros.h"
     12 
     13 namespace base {
     14 class HistogramSamples;
     15 }
     16 
     17 namespace chromeos {
     18 
     19 // Checks enum values in a histogram.
     20 class EnumHistogramChecker {
     21  public:
     22   EnumHistogramChecker(const std::string& histogram, int count,
     23                        base::HistogramSamples* base);
     24   ~EnumHistogramChecker();
     25 
     26   // Sets expectation for a given enum key. |key| must be between 0
     27   // and expect_.size().
     28   EnumHistogramChecker* Expect(int key, int value);
     29 
     30   // Actually accesses histogram and checks values for all keys.
     31   bool Check();
     32 
     33  private:
     34   // Name of a histogram.
     35   std::string histogram_;
     36 
     37   // List of expectations.
     38   std::vector<int> expect_;
     39 
     40   // When not NULL, expected values are compared with actual values
     41   // minus base.
     42   base::HistogramSamples* base_;
     43 
     44   DISALLOW_COPY_AND_ASSIGN(EnumHistogramChecker);
     45 };
     46 
     47 }  // namespace chromeos
     48 
     49 #endif  // CHROME_BROWSER_CHROMEOS_NET_NETWORK_PORTAL_DETECTOR_TEST_UTILS_H_
     50