gtest_pred_impl.h

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// Copyright 2006, Google Inc.
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// notice, this list of conditions and the following disclaimer.
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// in the documentation and/or other materials provided with the
// distribution.
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// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Implements a family of generic predicate assertion macros.

// IWYU pragma: private, include "gtest/gtest.h"
// IWYU pragma: friend gtest/.*
// IWYU pragma: friend gmock/.*

#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_

#include "gtest/gtest-assertion-result.h"
#include "gtest/internal/gtest-internal.h"
#include "gtest/internal/gtest-port.h"

namespace testing {

// This header implements a family of generic predicate assertion
// macros:
//
//   ASSERT_PRED_FORMAT1(pred_format, v1)
//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
//   ...
//
// where pred_format is a function or functor that takes n (in the
// case of ASSERT_PRED_FORMATn) values and their source expression
// text, and returns a testing::AssertionResult.  See the definition
// of ASSERT_EQ in gtest.h for an example.
//
// If you don't care about formatting, you can use the more
// restrictive version:
//
//   ASSERT_PRED1(pred, v1)
//   ASSERT_PRED2(pred, v1, v2)
//   ...
//
// where pred is an n-ary function or functor that returns bool,
// and the values v1, v2, ..., must support the << operator for
// streaming to std::ostream.
//
// We also define the EXPECT_* variations.
//
// For now we only support predicates whose arity is at most 5.
// Please email googletestframework@googlegroups.com if you need
// support for higher arities.

// GTEST_ASSERT_ is the basic statement to which all of the assertions
// in this file reduce.  Don't use this in your code.

#define GTEST_ASSERT_(expression, on_failure)                   \
  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                 \
  if (const ::testing::AssertionResult gtest_ar = (expression)) \
    ;                                                           \
  else                                                          \
    on_failure(gtest_ar.failure_message())

// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
// this in your code.
template <typename Pred, typename T1>
AssertionResult AssertPred1Helper(const char* pred_text, const char* e1,
                                  Pred pred, const T1& v1) {
  if (pred(v1)) return AssertionSuccess();

  return AssertionFailure()
         << pred_text << "(" << e1 << ") evaluates to false, where"
         << "\n"
         << e1 << " evaluates to " << ::testing::PrintToString(v1);
}

// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
// Don't use this in your code.
#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure) \
  GTEST_ASSERT_(pred_format(#v1, v1), on_failure)

// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
// this in your code.
#define GTEST_PRED1_(pred, v1, on_failure) \
  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, #v1, pred, v1), on_failure)

// Unary predicate assertion macros.
#define EXPECT_PRED_FORMAT1(pred_format, v1) \
  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
#define EXPECT_PRED1(pred, v1) GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
#define ASSERT_PRED_FORMAT1(pred_format, v1) \
  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
#define ASSERT_PRED1(pred, v1) GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)

// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
// this in your code.
template <typename Pred, typename T1, typename T2>
AssertionResult AssertPred2Helper(const char* pred_text, const char* e1,
                                  const char* e2, Pred pred, const T1& v1,
                                  const T2& v2) {
  if (pred(v1, v2)) return AssertionSuccess();

  return AssertionFailure()
         << pred_text << "(" << e1 << ", " << e2
         << ") evaluates to false, where"
         << "\n"
         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
         << e2 << " evaluates to " << ::testing::PrintToString(v2);
}

// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
// Don't use this in your code.
#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure) \
  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), on_failure)

// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
// this in your code.
#define GTEST_PRED2_(pred, v1, v2, on_failure)                               \
  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, #v1, #v2, pred, v1, v2), \
                on_failure)

// Binary predicate assertion macros.
#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
#define EXPECT_PRED2(pred, v1, v2) \
  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
#define ASSERT_PRED2(pred, v1, v2) \
  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)

// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
// this in your code.
template <typename Pred, typename T1, typename T2, typename T3>
AssertionResult AssertPred3Helper(const char* pred_text, const char* e1,
                                  const char* e2, const char* e3, Pred pred,
                                  const T1& v1, const T2& v2, const T3& v3) {
  if (pred(v1, v2, v3)) return AssertionSuccess();

  return AssertionFailure()
         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
         << ") evaluates to false, where"
         << "\n"
         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
         << e3 << " evaluates to " << ::testing::PrintToString(v3);
}

// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
// Don't use this in your code.
#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure) \
  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), on_failure)

// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
// this in your code.
#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)                          \
  GTEST_ASSERT_(                                                            \
      ::testing::AssertPred3Helper(#pred, #v1, #v2, #v3, pred, v1, v2, v3), \
      on_failure)

// Ternary predicate assertion macros.
#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
#define EXPECT_PRED3(pred, v1, v2, v3) \
  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
#define ASSERT_PRED3(pred, v1, v2, v3) \
  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)

// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
// this in your code.
template <typename Pred, typename T1, typename T2, typename T3, typename T4>
AssertionResult AssertPred4Helper(const char* pred_text, const char* e1,
                                  const char* e2, const char* e3,
                                  const char* e4, Pred pred, const T1& v1,
                                  const T2& v2, const T3& v3, const T4& v4) {
  if (pred(v1, v2, v3, v4)) return AssertionSuccess();

  return AssertionFailure()
         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
         << ") evaluates to false, where"
         << "\n"
         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
         << e4 << " evaluates to " << ::testing::PrintToString(v4);
}

// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
// Don't use this in your code.
#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure) \
  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), on_failure)

// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
// this in your code.
#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)                        \
  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, #v1, #v2, #v3, #v4, pred, \
                                             v1, v2, v3, v4),                 \
                on_failure)

// 4-ary predicate assertion macros.
#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)

// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
// this in your code.
template <typename Pred, typename T1, typename T2, typename T3, typename T4,
          typename T5>
AssertionResult AssertPred5Helper(const char* pred_text, const char* e1,
                                  const char* e2, const char* e3,
                                  const char* e4, const char* e5, Pred pred,
                                  const T1& v1, const T2& v2, const T3& v3,
                                  const T4& v4, const T5& v5) {
  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();

  return AssertionFailure()
         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
         << ", " << e5 << ") evaluates to false, where"
         << "\n"
         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
         << e5 << " evaluates to " << ::testing::PrintToString(v5);
}

// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
// Don't use this in your code.
#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)  \
  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
                on_failure)

// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
// this in your code.
#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)                   \
  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, #v1, #v2, #v3, #v4, #v5, \
                                             pred, v1, v2, v3, v4, v5),      \
                on_failure)

// 5-ary predicate assertion macros.
#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)

}  // namespace testing

#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_