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Re: [PATCH 3/3] t0006-date.sh: add `human` date format tests.

On Sun, Dec 30, 2018 at 05:31:50PM -0700, Stephen P. Smith wrote:

> The `human` date format varies based on two inputs: the date in the
> reference time which is constant and the local computers date which
> varies.  Using hardcoded test expected output dates would require
> holding the local machines date and time constant which is not
> desireable.
> Alternatively, letting the local date vary, which is the normal
> situation, implies that the tests would be checking for formating
> changes based on on a ref date relative to the local computers time.

We already have $TEST_DATE_NOW, which "test-tool date" will respect for
various commands to pretend that it's currently a particular time. I
think you'd need to add a sub-command similar to "relative" (which
directly calls show_date_relative()) which calls into the "human" code.

Note that there _isn't_ a way to have actual non-test git programs read
the current time from an environment variable (as opposed to actually
calling gettimeofday()).