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-// 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)
-
-#include "gtest/internal/gtest-tuple.h"
-#include <utility>
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::std::tr1::get;
-using ::std::tr1::make_tuple;
-using ::std::tr1::tuple;
-using ::std::tr1::tuple_element;
-using ::std::tr1::tuple_size;
-using ::testing::StaticAssertTypeEq;
-
-// Tests that tuple_element<K, tuple<T0, T1, ..., TN> >::type returns TK.
-TEST(tuple_element_Test, ReturnsElementType) {
- StaticAssertTypeEq<int, tuple_element<0, tuple<int, char> >::type>();
- StaticAssertTypeEq<int&, tuple_element<1, tuple<double, int&> >::type>();
- StaticAssertTypeEq<bool, tuple_element<2, tuple<double, int, bool> >::type>();
-}
-
-// Tests that tuple_size<T>::value gives the number of fields in tuple
-// type T.
-TEST(tuple_size_Test, ReturnsNumberOfFields) {
- EXPECT_EQ(0, +tuple_size<tuple<> >::value);
- EXPECT_EQ(1, +tuple_size<tuple<void*> >::value);
- EXPECT_EQ(1, +tuple_size<tuple<char> >::value);
- EXPECT_EQ(1, +(tuple_size<tuple<tuple<int, double> > >::value));
- EXPECT_EQ(2, +(tuple_size<tuple<int&, const char> >::value));
- EXPECT_EQ(3, +(tuple_size<tuple<char*, void, const bool&> >::value));
-}
-
-// Tests comparing a tuple with itself.
-TEST(ComparisonTest, ComparesWithSelf) {
- const tuple<int, char, bool> a(5, 'a', false);
-
- EXPECT_TRUE(a == a);
- EXPECT_FALSE(a != a);
-}
-
-// Tests comparing two tuples with the same value.
-TEST(ComparisonTest, ComparesEqualTuples) {
- const tuple<int, bool> a(5, true), b(5, true);
-
- EXPECT_TRUE(a == b);
- EXPECT_FALSE(a != b);
-}
-
-// Tests comparing two different tuples that have no reference fields.
-TEST(ComparisonTest, ComparesUnequalTuplesWithoutReferenceFields) {
- typedef tuple<const int, char> FooTuple;
-
- const FooTuple a(0, 'x');
- const FooTuple b(1, 'a');
-
- EXPECT_TRUE(a != b);
- EXPECT_FALSE(a == b);
-
- const FooTuple c(1, 'b');
-
- EXPECT_TRUE(b != c);
- EXPECT_FALSE(b == c);
-}
-
-// Tests comparing two different tuples that have reference fields.
-TEST(ComparisonTest, ComparesUnequalTuplesWithReferenceFields) {
- typedef tuple<int&, const char&> FooTuple;
-
- int i = 5;
- const char ch = 'a';
- const FooTuple a(i, ch);
-
- int j = 6;
- const FooTuple b(j, ch);
-
- EXPECT_TRUE(a != b);
- EXPECT_FALSE(a == b);
-
- j = 5;
- const char ch2 = 'b';
- const FooTuple c(j, ch2);
-
- EXPECT_TRUE(b != c);
- EXPECT_FALSE(b == c);
-}
-
-// Tests that a tuple field with a reference type is an alias of the
-// variable it's supposed to reference.
-TEST(ReferenceFieldTest, IsAliasOfReferencedVariable) {
- int n = 0;
- tuple<bool, int&> t(true, n);
-
- n = 1;
- EXPECT_EQ(n, get<1>(t))
- << "Changing a underlying variable should update the reference field.";
-
- // Makes sure that the implementation doesn't do anything funny with
- // the & operator for the return type of get<>().
- EXPECT_EQ(&n, &(get<1>(t)))
- << "The address of a reference field should equal the address of "
- << "the underlying variable.";
-
- get<1>(t) = 2;
- EXPECT_EQ(2, n)
- << "Changing a reference field should update the underlying variable.";
-}
-
-// Tests that tuple's default constructor default initializes each field.
-// This test needs to compile without generating warnings.
-TEST(TupleConstructorTest, DefaultConstructorDefaultInitializesEachField) {
- // The TR1 report requires that tuple's default constructor default
- // initializes each field, even if it's a primitive type. If the
- // implementation forgets to do this, this test will catch it by
- // generating warnings about using uninitialized variables (assuming
- // a decent compiler).
-
- tuple<> empty;
-
- tuple<int> a1, b1;
- b1 = a1;
- EXPECT_EQ(0, get<0>(b1));
-
- tuple<int, double> a2, b2;
- b2 = a2;
- EXPECT_EQ(0, get<0>(b2));
- EXPECT_EQ(0.0, get<1>(b2));
-
- tuple<double, char, bool*> a3, b3;
- b3 = a3;
- EXPECT_EQ(0.0, get<0>(b3));
- EXPECT_EQ('\0', get<1>(b3));
- EXPECT_TRUE(get<2>(b3) == NULL);
-
- tuple<int, int, int, int, int, int, int, int, int, int> a10, b10;
- b10 = a10;
- EXPECT_EQ(0, get<0>(b10));
- EXPECT_EQ(0, get<1>(b10));
- EXPECT_EQ(0, get<2>(b10));
- EXPECT_EQ(0, get<3>(b10));
- EXPECT_EQ(0, get<4>(b10));
- EXPECT_EQ(0, get<5>(b10));
- EXPECT_EQ(0, get<6>(b10));
- EXPECT_EQ(0, get<7>(b10));
- EXPECT_EQ(0, get<8>(b10));
- EXPECT_EQ(0, get<9>(b10));
-}
-
-// Tests constructing a tuple from its fields.
-TEST(TupleConstructorTest, ConstructsFromFields) {
- int n = 1;
- // Reference field.
- tuple<int&> a(n);
- EXPECT_EQ(&n, &(get<0>(a)));
-
- // Non-reference fields.
- tuple<int, char> b(5, 'a');
- EXPECT_EQ(5, get<0>(b));
- EXPECT_EQ('a', get<1>(b));
-
- // Const reference field.
- const int m = 2;
- tuple<bool, const int&> c(true, m);
- EXPECT_TRUE(get<0>(c));
- EXPECT_EQ(&m, &(get<1>(c)));
-}
-
-// Tests tuple's copy constructor.
-TEST(TupleConstructorTest, CopyConstructor) {
- tuple<double, bool> a(0.0, true);
- tuple<double, bool> b(a);
-
- EXPECT_DOUBLE_EQ(0.0, get<0>(b));
- EXPECT_TRUE(get<1>(b));
-}
-
-// Tests constructing a tuple from another tuple that has a compatible
-// but different type.
-TEST(TupleConstructorTest, ConstructsFromDifferentTupleType) {
- tuple<int, int, char> a(0, 1, 'a');
- tuple<double, long, int> b(a);
-
- EXPECT_DOUBLE_EQ(0.0, get<0>(b));
- EXPECT_EQ(1, get<1>(b));
- EXPECT_EQ('a', get<2>(b));
-}
-
-// Tests constructing a 2-tuple from an std::pair.
-TEST(TupleConstructorTest, ConstructsFromPair) {
- ::std::pair<int, char> a(1, 'a');
- tuple<int, char> b(a);
- tuple<int, const char&> c(a);
-}
-
-// Tests assigning a tuple to another tuple with the same type.
-TEST(TupleAssignmentTest, AssignsToSameTupleType) {
- const tuple<int, long> a(5, 7L);
- tuple<int, long> b;
- b = a;
- EXPECT_EQ(5, get<0>(b));
- EXPECT_EQ(7L, get<1>(b));
-}
-
-// Tests assigning a tuple to another tuple with a different but
-// compatible type.
-TEST(TupleAssignmentTest, AssignsToDifferentTupleType) {
- const tuple<int, long, bool> a(1, 7L, true);
- tuple<long, int, bool> b;
- b = a;
- EXPECT_EQ(1L, get<0>(b));
- EXPECT_EQ(7, get<1>(b));
- EXPECT_TRUE(get<2>(b));
-}
-
-// Tests assigning an std::pair to a 2-tuple.
-TEST(TupleAssignmentTest, AssignsFromPair) {
- const ::std::pair<int, bool> a(5, true);
- tuple<int, bool> b;
- b = a;
- EXPECT_EQ(5, get<0>(b));
- EXPECT_TRUE(get<1>(b));
-
- tuple<long, bool> c;
- c = a;
- EXPECT_EQ(5L, get<0>(c));
- EXPECT_TRUE(get<1>(c));
-}
-
-// A fixture for testing big tuples.
-class BigTupleTest : public testing::Test {
- protected:
- typedef tuple<int, int, int, int, int, int, int, int, int, int> BigTuple;
-
- BigTupleTest() :
- a_(1, 0, 0, 0, 0, 0, 0, 0, 0, 2),
- b_(1, 0, 0, 0, 0, 0, 0, 0, 0, 3) {}
-
- BigTuple a_, b_;
-};
-
-// Tests constructing big tuples.
-TEST_F(BigTupleTest, Construction) {
- BigTuple a;
- BigTuple b(b_);
-}
-
-// Tests that get<N>(t) returns the N-th (0-based) field of tuple t.
-TEST_F(BigTupleTest, get) {
- EXPECT_EQ(1, get<0>(a_));
- EXPECT_EQ(2, get<9>(a_));
-
- // Tests that get() works on a const tuple too.
- const BigTuple a(a_);
- EXPECT_EQ(1, get<0>(a));
- EXPECT_EQ(2, get<9>(a));
-}
-
-// Tests comparing big tuples.
-TEST_F(BigTupleTest, Comparisons) {
- EXPECT_TRUE(a_ == a_);
- EXPECT_FALSE(a_ != a_);
-
- EXPECT_TRUE(a_ != b_);
- EXPECT_FALSE(a_ == b_);
-}
-
-TEST(MakeTupleTest, WorksForScalarTypes) {
- tuple<bool, int> a;
- a = make_tuple(true, 5);
- EXPECT_TRUE(get<0>(a));
- EXPECT_EQ(5, get<1>(a));
-
- tuple<char, int, long> b;
- b = make_tuple('a', 'b', 5);
- EXPECT_EQ('a', get<0>(b));
- EXPECT_EQ('b', get<1>(b));
- EXPECT_EQ(5, get<2>(b));
-}
-
-TEST(MakeTupleTest, WorksForPointers) {
- int a[] = { 1, 2, 3, 4 };
- const char* const str = "hi";
- int* const p = a;
-
- tuple<const char*, int*> t;
- t = make_tuple(str, p);
- EXPECT_EQ(str, get<0>(t));
- EXPECT_EQ(p, get<1>(t));
-}
-
-} // namespace