Little extension for Assertions - assertThat(Invoker).withParameters(Object...).willThrow(Class<? extends Exception>)

Hello,

in the last days I tried a lot of things with FEST and for my own tests I wrote some useful classes and I think it could be useful to have them in FEST for all users. The idea was to have an assert-method that expects an exception when calling the given method.

And then I thought I could use the method in my JTreeFixture for example to ensure that a given row doesn't exist. This maybe a crazy way to test this, but I wanted to use my method

I attached the classes that I would need to define a new assert-method. Feel free to use the code or not to ..

I would add this method to Assertions:

public static ExceptionalMethod assertThat(Invoker<Void> i)

The method I would add into JTreeFixture would look like:

public JTreeFixture ensureRowDoesntExist(int row) throws IllegalArgumentException, SecurityException

Thanks!