gmock-matchers.cc | Explore in Territory

// 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.

// Google Mock - a framework for writing C++ mock classes.
//
// This file implements Matcher<const string&>, Matcher<string>, and
// utilities for defining matchers.

#include "gmock/gmock-matchers.h"

#include <string.h>

#include <iostream>
#include <sstream>
#include <string>
#include <vector>

namespace testing {
namespace internal {

// Returns the description for a matcher defined using the MATCHER*()
// macro where the user-supplied description string is "", if
// 'negation' is false; otherwise returns the description of the
// negation of the matcher.  'param_values' contains a list of strings
// that are the print-out of the matcher's parameters.
GTEST_API_ std::string FormatMatcherDescription(
    bool negation, const char* matcher_name,
    const std::vector<const char*>& param_names, const Strings& param_values) { … }

// FindMaxBipartiteMatching and its helper class.
//
// Uses the well-known Ford-Fulkerson max flow method to find a maximum
// bipartite matching. Flow is considered to be from left to right.
// There is an implicit source node that is connected to all of the left
// nodes, and an implicit sink node that is connected to all of the
// right nodes. All edges have unit capacity.
//
// Neither the flow graph nor the residual flow graph are represented
// explicitly. Instead, they are implied by the information in 'graph' and
// a vector<int> called 'left_' whose elements are initialized to the
// value kUnused. This represents the initial state of the algorithm,
// where the flow graph is empty, and the residual flow graph has the
// following edges:
//   - An edge from source to each left_ node
//   - An edge from each right_ node to sink
//   - An edge from each left_ node to each right_ node, if the
//     corresponding edge exists in 'graph'.
//
// When the TryAugment() method adds a flow, it sets left_[l] = r for some
// nodes l and r. This induces the following changes:
//   - The edges (source, l), (l, r), and (r, sink) are added to the
//     flow graph.
//   - The same three edges are removed from the residual flow graph.
//   - The reverse edges (l, source), (r, l), and (sink, r) are added
//     to the residual flow graph, which is a directional graph
//     representing unused flow capacity.
//
// When the method augments a flow (moving left_[l] from some r1 to some
// other r2), this can be thought of as "undoing" the above steps with
// respect to r1 and "redoing" them with respect to r2.
//
// It bears repeating that the flow graph and residual flow graph are
// never represented explicitly, but can be derived by looking at the
// information in 'graph' and in left_.
//
// As an optimization, there is a second vector<int> called right_ which
// does not provide any new information. Instead, it enables more
// efficient queries about edges entering or leaving the right-side nodes
// of the flow or residual flow graphs. The following invariants are
// maintained:
//
// left[l] == kUnused or right[left[l]] == l
// right[r] == kUnused or left[right[r]] == r
//
// . [ source ]                                        .
// .   |||                                             .
// .   |||                                             .
// .   ||\--> left[0]=1  ---\    right[0]=-1 ----\     .
// .   ||                   |                    |     .
// .   |\---> left[1]=-1    \--> right[1]=0  ---\|     .
// .   |                                        ||     .
// .   \----> left[2]=2  ------> right[2]=2  --\||     .
// .                                           |||     .
// .         elements           matchers       vvv     .
// .                                         [ sink ]  .
//
// See Also:
//   [1] Cormen, et al (2001). "Section 26.2: The Ford-Fulkerson method".
//       "Introduction to Algorithms (Second ed.)", pp. 651-664.
//   [2] "Ford-Fulkerson algorithm", Wikipedia,
//       'https://en.wikipedia.org/wiki/Ford%E2%80%93Fulkerson_algorithm'
class MaxBipartiteMatchState { … };

const size_t MaxBipartiteMatchState::kUnused;

GTEST_API_ ElementMatcherPairs FindMaxBipartiteMatching(const MatchMatrix& g) { … }

static void LogElementMatcherPairVec(const ElementMatcherPairs& pairs,
                                     ::std::ostream* stream) { … }

bool MatchMatrix::NextGraph() { … }

void MatchMatrix::Randomize() { … }

std::string MatchMatrix::DebugString() const { … }

void UnorderedElementsAreMatcherImplBase::DescribeToImpl(
    ::std::ostream* os) const { … }

void UnorderedElementsAreMatcherImplBase::DescribeNegationToImpl(
    ::std::ostream* os) const { … }

// Checks that all matchers match at least one element, and that all
// elements match at least one matcher. This enables faster matching
// and better error reporting.
// Returns false, writing an explanation to 'listener', if and only
// if the success criteria are not met.
bool UnorderedElementsAreMatcherImplBase::VerifyMatchMatrix(
    const ::std::vector<std::string>& element_printouts,
    const MatchMatrix& matrix, MatchResultListener* listener) const { … }

bool UnorderedElementsAreMatcherImplBase::FindPairing(
    const MatchMatrix& matrix, MatchResultListener* listener) const { … }

}  // namespace internal
}  // namespace testing
chromium/third_party/googletest/src/googlemock/src/gmock-matchers.cc
