我正在尋找類似於ASSERT_EQ/ASSERT_NE的ASSERT_DOUBLE_EQ。方便的方法在GoogleTest中進行雙比較不等於?
也許我錯過了一個沒有ASSERT_DOUBLE_NE的簡單方法嗎?
我正在尋找類似於ASSERT_EQ/ASSERT_NE的ASSERT_DOUBLE_EQ。方便的方法在GoogleTest中進行雙比較不等於?
也許我錯過了一個沒有ASSERT_DOUBLE_NE的簡單方法嗎?
看起來你運氣不好。但是,您可以自己添加一個。我使用ASSERT_DOUBLE_EQ和ASSERT_NE作爲模式構建了以下代碼。
#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);
}
您可以使用伴侶模擬框架Google Mock。它的匹配的強大的類庫(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)));
,而不是創建一個新的CmpHelperFloatingPointNE幫手,你可以定義宏作爲的倒數現有的幫手:
#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 \
)
因爲當斷言失敗,也有像「預期值」和「實際價值」,只是行號和斷言的文件中沒有具體細節,這並不像deft_code的解決方案優雅。不過,就我而言,行號就足夠了。