On Fri, Aug 19, 2016 at 10:51:23AM -0400, Jeff King wrote: > On Fri, Aug 19, 2016 at 07:42:35AM -0700, Brian Henderson wrote: > > > > > +# PERL is required, but assumed to be present, although not necessarily modern > > > > +# some tests require 5.8 > > > > +test_expect_success PERL 'name' 'true' > > > > > > If the platform lacks PERL prerequisite, this will simply be > > > skipped, and if the platform has it, it will always succeed. > > > > > > I am not sure what you are trying to achieve by having this line > > > here. > > > > I originally didn't have this line, and my comment was referring to the > > t/README which says > > > > Even without the PERL prerequisite, tests can assume there is a > > usable perl interpreter at $PERL_PATH, though it need not be > > particularly modern. > > > > There is current functionality in diff-highlight which requires at least > > perl 5.8 (the utf8 functions). I was going to add a test for this as > > well, but I'm not super comfy with multibyte chars. > > Yeah, I'd agree this test would want the PERL prereq. It is not just > using perl for one-liners in support of the script; it is testing major > perl functionality that should be skipped if we do not have a modern > perl available. > > > Eric recommended adding this line, what do you think? > > > > would `test_set_prereq PERL` be better? > > test_set_prereq is for telling the test scripts that we _have_ perl, but > what I think this script wants to do is test "do we have perl?" and > abort otherwise. The way to do that is: > > if ! test_have_prereq PERL > then > skip_all='skipping diff-highlight tests; perl not available' > test_done > fi > > > > > +test_expect_success 'diff-highlight does not highlight whole line' ' > > > > + dh_test \ > > > > + "aaa\nbbb\nccc\n" \ > > > > + "aaa\n000\nccc\n" > > > > +' > > > > This (at least to me) is desired. See comment for `sub > > is_pair_interesting` > > Yeah, that is an intentional behavior, and makes sense to test. > > > > > +test_expect_success 'diff-highlight does not highlight mismatched hunk size' ' > > > > + dh_test \ > > > > + "aaa\nbbb\n" \ > > > > + "aaa\nb0b\nccc\n" > > > > +' > > > > This is undesired behavior, but currently implemented for simplicity, > > see `sub show_hunk` > > > > Do they need comments or something? > > Undesired behavior should generally not be tested for. It just makes > life harder for somebody when they make a change that violates it, and > they have to figure out "oh, but it's _good_ that I changed that, the > tests were wrong" (or more likely "I didn't fix it, but it's just broken > in a different way, and neither is preferable"). > > If you want to document known shortcomings, the best thing to do is show > what you'd _like_ to have happen, and mark it as test_expect_failure; > the test scripts show this as a known-breakage, and somebody later who > fixes it can flip the "failure" to "success". > > -Peff all very helpful, thanks! -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html