Diffing string checker

[Nate Finch]

I agree with Horacio, you're my hero, Andrew.

I was actually just looking at sergi's diffmatchpatch implementation for
exactly this purpose a couple days ago.  Thanks for doing that!

On Thu, Feb 25, 2016 at 6:09 AM Andrew Wilkins <andrew.wilkins at canonical.com>
wrote:

> On Thu, Feb 25, 2016 at 5:23 PM roger peppe <rogpeppe at gmail.com> wrote:
>
>> Nice. FWIW I have a related tool that tries to help find where a regexp
>> mismatch has happened. It parses the output of gocheck, so it's
>> probably not that useful to non-acme users but you might want
>> to consider including the approach (http://paste.ubuntu.com/15195795/)
>> for fancycheck.Matches and ErrorMatches, perhaps, to highlight where
>> the mismatch starts.
>>
>
> Thanks, that is a better idea. I'll look into doing that next time I'm
> staring at a wall of text :)
>
>
>> On 25 February 2016 at 06:26, 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")
>> >
>> > Cheers,
>> > Andrew
>> >
>> > --
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