我正在寻找类似于ASSERT_EQ/ASSERT_NE的ASSERT_DOUBLE_EQ。方便的方法在GoogleTest中进行双比较不等于?
也许我错过了一个没有ASSERT_DOUBLE_NE的简单方法吗?
我正在寻找类似于ASSERT_EQ/ASSERT_NE的ASSERT_DOUBLE_EQ。方便的方法在GoogleTest中进行双比较不等于?
也许我错过了一个没有ASSERT_DOUBLE_NE的简单方法吗?
看起来你运气不好。但是,您可以自己添加一个。我使用ASSERT_DOUBLE_EQ和ASSERT_NE作为模式构建了以下代码。
#define ASSERT_DOUBLE_NE(expected, actual)\
ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointNE<double>, \
expected, actual)
// Helper template function for comparing floating-points.
//
// Template parameter:
//
// RawType: the raw floating-point type (either float or double)
//
// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
template <typename RawType>
AssertionResult CmpHelperFloatingPointNE(const char* expected_expression,
const char* actual_expression,
RawType expected,
RawType actual) {
const FloatingPoint<RawType> lhs(expected), rhs(actual);
if (! lhs.AlmostEquals(rhs)) {
return AssertionSuccess();
}
StrStream expected_ss;
expected_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
<< expected;
StrStream actual_ss;
actual_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
<< actual;
Message msg;
msg << "Expected: (" << expected_expression << ") != (" << actual_expression
<< "), actual: (" << StrStreamToString(expected_ss) << ") == ("
<< StrStreamToString(actual_ss) << ")";
return AssertionFailure(msg);
}
您可以使用伴侣模拟框架Google Mock。它的匹配的强大的类库(一拉Hamcrest),您可以用EXPECT_THAT/ASSERT_THAT宏使用:
EXPECT_THAT(value, FloatEq(1));
EXPECT_THAT(another_value, Not(DoubleEq(3.14)));
,而不是创建一个新的CmpHelperFloatingPointNE帮手,你可以定义宏作为的倒数现有的帮手:
#include "gtest/gtest.h"
#define ASSERT_FLOAT_NE(val1, val2) ASSERT_PRED_FORMAT2(\
!::testing::internal::CmpHelperFloatingPointEQ<float>, val1, val2 \
)
#define ASSERT_DOUBLE_NE(val1, val2) ASSERT_PRED_FORMAT2(\
!::testing::internal::CmpHelperFloatingPointEQ<double>, val1, val2 \
)
因为当断言失败,也有像“预期值”和“实际价值”,只是行号和断言的文件中没有具体细节,这并不像deft_code的解决方案优雅。不过,就我而言,行号就足够了。