Re: [PATCH 2/3] Add a test for git-rerere

Johannes Schindelin [off-list ref] writes:

+cat > a1 << EOF
+Whether 'tis nobler in the mind to suffer
+The slings and arrows of outrageous fortune,
+Or to take arms against a sea of troubles,
+And by opposing end them? To die: to sleep;
+No more; and by a sleep to say we end
+The heart-ache and the thousand natural shocks
+That flesh is heir to, 'tis a consummation
+Devoutly to be wish'd.
+EOF

This is out of copyright protection long time ago, so it would
be fine to use in example ;-).

+sha1=4f58849a60b4f969a2848966b6d02893b783e8fb
+rr=.git/rr-cache/$sha1
+test_expect_success 'recorded preimage' "grep ======= $rr/preimage"
+
+test_expect_success 'no postimage or thisimage yet' \
+	"test ! -f $rr/postimage -a ! -f $rr/thisimage"

I am worried that this test specifies the behaviour a bit too
precisely.  It is not t0000 basic where we want bit-for-bit
match with the expected result.  Wouldn't this test break when
you further improve xdl_merge, for example?

+rm $rr/postimage
+echo -ne "$sha1\ta1\0" > .git/rr-cache/MERGE_RR

Hmmmmmm.  I've stayed away from "echo -e" so far...

+sha2=4000000000000000000000000000000000000000
+rr2=.git/rr-cache/$sha2
+mkdir $rr2
+echo Hello > $rr2/preimage

Collisions are not so likely and perhaps we do not care.

+case "$(date -d @11111111 +%s 2>/dev/null)" in
+[1-9]*)
+	# it is a recent GNU date. good.
+	now=$(date +%s)
+	let almost_15_days_ago=$now+60-15*86400
+	let just_over_15_days_ago=$now-1-15*86400
+	let almost_60_days_ago=$now+60-60*86400
+	let just_over_60_days_ago=$now-1-60*86400

Hmmmmm.  I've stayed away from "let" so far as well...