test_cmp expect actual
'
+test_expect_success 'dotdot is not an empty set' '
+ ( H=$(git rev-parse HEAD) && echo $H && echo ^$H ) >expect &&
+
+ git rev-parse HEAD.. >actual &&
+ test_cmp expect actual &&
+
+ git rev-parse ..HEAD >actual &&
+ test_cmp expect actual &&
+
+ echo .. >expect &&
+ git rev-parse .. >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'arg before dashdash must be a revision (missing)' '
+ test_must_fail git rev-parse foobar -- 2>stderr &&
+ test_i18ngrep "bad revision" stderr
+'
+
+test_expect_success 'arg before dashdash must be a revision (file)' '
+ >foobar &&
+ test_must_fail git rev-parse foobar -- 2>stderr &&
+ test_i18ngrep "bad revision" stderr
+'
+
+test_expect_success 'arg before dashdash must be a revision (ambiguous)' '
+ >foobar &&
+ git update-ref refs/heads/foobar HEAD &&
+ {
+ # we do not want to use rev-parse here, because
+ # we are testing it
+ cat .git/refs/heads/foobar &&
+ printf "%s\n" --
+ } >expect &&
+ git rev-parse foobar -- >actual &&
+ test_cmp expect actual
+'
+
test_done