DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d38398e5144e)

VCS Links

Cardinality

CardinalityInterface

Macros

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
// Copyright 2007, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: wan@google.com (Zhanyong Wan)

// Google Mock - a framework for writing C++ mock classes.
//
// This file implements some commonly used cardinalities.  More
// cardinalities can be defined by the user implementing the
// CardinalityInterface interface if necessary.

#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
#define GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_

#include <limits.h>
#include <ostream>  // NOLINT
#include "gmock/internal/gmock-port.h"
#include "gtest/gtest.h"

namespace testing {

// To implement a cardinality Foo, define:
//   1. a class FooCardinality that implements the
//      CardinalityInterface interface, and
//   2. a factory function that creates a Cardinality object from a
//      const FooCardinality*.
//
// The two-level delegation design follows that of Matcher, providing
// consistency for extension developers.  It also eases ownership
// management as Cardinality objects can now be copied like plain values.

// The implementation of a cardinality.
class CardinalityInterface {
 public:
  virtual ~CardinalityInterface() {}

  // Conservative estimate on the lower/upper bound of the number of
  // calls allowed.
  virtual int ConservativeLowerBound() const { return 0; }
  virtual int ConservativeUpperBound() const { return INT_MAX; }

  // Returns true iff call_count calls will satisfy this cardinality.
  virtual bool IsSatisfiedByCallCount(int call_count) const = 0;

  // Returns true iff call_count calls will saturate this cardinality.
  virtual bool IsSaturatedByCallCount(int call_count) const = 0;

  // Describes self to an ostream.
  virtual void DescribeTo(::std::ostream* os) const = 0;
};

// A Cardinality is a copyable and IMMUTABLE (except by assignment)
// object that specifies how many times a mock function is expected to
// be called.  The implementation of Cardinality is just a linked_ptr
// to const CardinalityInterface, so copying is fairly cheap.
// Don't inherit from Cardinality!
class Cardinality {
 public:
  // Constructs a null cardinality.  Needed for storing Cardinality
  // objects in STL containers.
  Cardinality() {}

  // Constructs a Cardinality from its implementation.
  explicit Cardinality(const CardinalityInterface* impl) : impl_(impl) {}

  // Conservative estimate on the lower/upper bound of the number of
  // calls allowed.
  int ConservativeLowerBound() const { return impl_->ConservativeLowerBound(); }
  int ConservativeUpperBound() const { return impl_->ConservativeUpperBound(); }

  // Returns true iff call_count calls will satisfy this cardinality.
  bool IsSatisfiedByCallCount(int call_count) const {
    return impl_->IsSatisfiedByCallCount(call_count);
  }

  // Returns true iff call_count calls will saturate this cardinality.
  bool IsSaturatedByCallCount(int call_count) const {
    return impl_->IsSaturatedByCallCount(call_count);
  }

  // Returns true iff call_count calls will over-saturate this
  // cardinality, i.e. exceed the maximum number of allowed calls.
  bool IsOverSaturatedByCallCount(int call_count) const {
    return impl_->IsSaturatedByCallCount(call_count) &&
        !impl_->IsSatisfiedByCallCount(call_count);
  }

  // Describes self to an ostream
  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }

  // Describes the given actual call count to an ostream.
  static void DescribeActualCallCountTo(int actual_call_count,
                                        ::std::ostream* os);
 private:
  internal::linked_ptr<const CardinalityInterface> impl_;
};

// Creates a cardinality that allows at least n calls.
Cardinality AtLeast(int n);

// Creates a cardinality that allows at most n calls.
Cardinality AtMost(int n);

// Creates a cardinality that allows any number of calls.
Cardinality AnyNumber();

// Creates a cardinality that allows between min and max calls.
Cardinality Between(int min, int max);

// Creates a cardinality that allows exactly n calls.
Cardinality Exactly(int n);

// Creates a cardinality from its implementation.
inline Cardinality MakeCardinality(const CardinalityInterface* c) {
  return Cardinality(c);
}

}  // namespace testing

#endif  // GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_