[TIP] Announcing Expecter Gadget

Gary Bernhardt gary.bernhardt at gmail.com
Sun Mar 7 10:19:52 PST 2010

On Sun, Mar 7, 2010 at 6:27 AM, Marius Gedminas <marius at gedmin.as> wrote:
> All of them?  Let's try this:
>    >>> from expecter import expect
>    >>> 1 < expect(2) < 3
>    >>> 1 < expect(4) < 3
>    >>>
> Bug?

Nice catch. I hadn't considered that. I just fixed it; all it required
was for all of the overloaded operators to return self. It's released
as expecter 0.1.2.

> Incidentally, a < expect(x) < b doesn't scan nicely when you read it out
> loud in English.  expect(x).between(a, b) is better, but raises
> questions about closed vs open vs half-open intervals.  How would you
> write an assertion like this?

I'm not really sure – I don't think I've ever written an assertion of
that form before. I don't feel too bad about that syntax, though; the
reads-left-to-right issue is not the highest priority. I definitely
don't want to go down the DSL fad route where "it must read like
English!" Let code be code; if it happens to read nicely in many
common cases, so much the better. :)


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