asserting Assert.ThrowsException and failing creates an exception where the message include the message and stacktrace in it

[Meir017]

Describe the bug

In the following method the exception fails and throws AssertFailedException.

The exception message

[TestMethod, ExpectedException(typeof(AssertFailedException))]
public async Task AssertThrowsExceptionAsync_Failure_OldAssertion()
{
    // arrange
    static Task ThrowExceptionAsync() => throw new InvalidOperationException();
    Func<Task> action = ThrowExceptionAsync;
    
    // old assertion:
    await Assert.ThrowsExceptionAsync<ArgumentException>(action);
}

Steps To Reproduce

using Assert.ThrowsException or Assert.ThrowsExceptionAsync and failing throws an AssertFailedException exception where the Message property contains "Exception Message: <the message>" and the "Stack Trace: at <stack-trace>"

Expected behavior

The exception's Message property should only include the fail message (like any other assertion method in mstest)

Actual behavior

Additional context

[Evangelink]

Hi @Meir017,

Sorry I missed this report! This is indeed inconsistent with the other assertion message so we will fix it.