测试特定的异常类型被抛出，异常具有正确的属性 [英] Test a specific exception type is thrown AND the exception has the right properties

问题描述

我想测试在某种情况下抛出 MyException 。 EXPECT_THROW 在这里很好。但我也想检查异常有一个特定的状态例如 e.msg（）==Cucumber overflow。

I want to test that MyException is thrown in a certain case. EXPECT_THROW is good here. But I also want to check the exception has a specific state e.g e.msg() == "Cucumber overflow".

在GTest中最好如何实现？

How is this best implemented in GTest?

推荐答案

我大多是第二次Lilshieste的回答， $ b验证不会抛出错误的异常类型：

I mostly second Lilshieste's answer but would add that you also should verify that the wrong exception type is not thrown:

#include <stdexcept>
#include "gtest/gtest.h"

struct foo
{
    int bar(int i) {
        if (i > 100) {
            throw std::out_of_range("Out of range");
        }
        return i;
    }
};

TEST(foo_test,out_of_range)
{
    foo f;
    try {
        f.bar(111);
        FAIL() << "Expected std::out_of_range";
    }
    catch(std::out_of_range const & err) {
        EXPECT_EQ(err.what(),std::string("Out of range"));
    }
    catch(...) {
        FAIL() << "Expected std::out_of_range";
    }
}

int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}

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