对于那些使用NUnit 3.0约束模型并在这里结束的人:

Assert.That(() => MethodUnderTest(someValue), Throws.TypeOf<ArgumentException>());

我最近遇到了同样的事情，并建议将这个函数用于MSTest:

public bool AssertThrows(Action action) where T : Exception
{
    try {action();
}
catch(Exception exception)
{
    if (exception.GetType() == typeof(T))
        return true;
}
    return false;
}

用法:

Assert.IsTrue(AssertThrows<FormatException>(delegate{ newMyMethod(MyParameter); }));

在Assert中有更多关于发生特定异常的信息(Assert。抛出MSTest)。

由于我被一些新的NUnit模式的冗长所困扰，我使用这样的方法来创建对我个人来说更清晰的代码:

public void AssertBusinessRuleException(TestDelegate code, string expectedMessage)
{
    var ex = Assert.Throws<BusinessRuleException>(code);
    Assert.AreEqual(ex.Message, expectedMessage);
}

public void AssertException<T>(TestDelegate code, string expectedMessage) where T:Exception
{
    var ex = Assert.Throws<T>(code);
    Assert.AreEqual(ex.Message, expectedMessage);
}

用法是:

AssertBusinessRuleException(() => user.MakeUserActive(), "Actual exception message");

断言例外:

Junit 5:

    @Test
    public void whenExceptionThrown_thenAssertionSucceeds() {
        Exception exception = assertThrows(NumberFormatException.class, () -> {
            Integer.parseInt("1a");
        });
    
        String expectedMessage = "For input string";
        String actualMessage = exception.getMessage();
    
        assertTrue(actualMessage.contains(expectedMessage));
    }

在Junit 4中:

@Test(expected = NullPointerException.class)
public void whenExceptionThrown_thenExpectationSatisfied() {
    String test = null;
    test.length();
}

Assert.That(myTestDelegate, Throws.ArgumentException
    .With.Property("Message").EqualTo("your argument is invalid."));

您现在可以使用ExpectedException属性，例如:

[Test]
[ExpectedException(typeof(InvalidOperationException), 
 ExpectedMessage="You can't do that!"]
public void MethodA_WithNull_ThrowsInvalidOperationException()
{
    MethodA(null);
}