Diffing string checker

[Eric Snow]

On Wed, Feb 24, 2016 at 11:26 PM, Andrew Wilkins
<andrew.wilkins at canonical.com> wrote:
> Howdy,
>
> Occasionally I'll change a test, and some string equality test will fail
> with a wall of text. Sometimes we shouldn't be checking the whole string,
> but sometimes it's legitimate to do so, and it can be difficult/tedious to
> spot the differences.
>
> I've just written a checker which diffs the two string args, and colourises
> the output. You may find it useful. I'm using red/green background, but I
> also added bold for insertions, strike-through for deletions, in case you're
> red/green colour blind. My terminal doesn't do strike-through, and your's
> probably doesn't either. Anyway, the important thing is you can see the
> difference between bits that are the same vs. insertions/deletions.
>
> Code is at github.com/axw/fancycheck. Just replace
>     c.Assert("x", gc.Equals, "y")
> with
>     c.Assert("x", fancycheck.StringEquals, "y")

FYI, I added something like this to the juju repo a while back:

https://github.com/juju/juju/blob/master/testing/base.go#L166

It's not a gc checker like yours but it has the same effect.

-eric