Enhancing the testing library to support assertions

The passing grades test from the previous section has two confirms that we’re going to improve in this section. It looks like this:

TEST("Test passing grades")
{
    bool result = isPassingGrade(0);
    if (result)
    {
        throw 1;
    }
    result = isPassingGrade(100);
    if (not result)
    {
        throw 1;
    }
}

In the first confirm, we want to make sure that result is false because we know that a score of 0 should not be a passing grade. And for the second confirm, we want to make sure that, this time, result is true because we know that a score of 100 should lead to a passing grade.

Can you see how the if condition needs to be the opposite of what we’...