Re: [PATCH 3/4] t: rev-parse-parents: avoid yoda conditions

[Jeff King <peff@peff.net>]

On Mon, Sep 02, 2013 at 01:30:38AM -0500, Felipe Contreras wrote:

> Just as 5 == X is weird, so is comparing first the expected value, and
> then the value we are testing. So switch them around.

Actually, our normal comparison order for test output is "test_cmp
expect actual", as it shows a test failure as a diff with the expected
output as the base (i.e., the diff shows what went wrong).

That reasoning does not apply to "test a = b", which shows no output at
all. However, if you want to clean up and modernize these tests, it
would probably be better to simply convert them to use test_cmp.

I wonder if we should have a:

  test_cmp_args () {
          echo "$1" >expect &&
          echo "$1" >actual &&
          test_cmp expect actual
  }

to let these remain one-liners like:

  test_cmp_args "$(git rev-parse start)" "$(git rev-parse final^1^1^1)"

-Peff