t7610: test for mktemp before test execution

mktemp is not available on all platforms, so the test
'temporary filenames are used with mergetool.writeToTemp'
fails there.
This patch does not replace mktemp but just disables
the test that otherwise would fail.
mergetool checks itself before executing mktemp and
reports an error.

Signed-off-by: Armin Kunaschik <megabreit@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t7610-mergetool.sh b/t/t7610-mergetool.sh
index 76306cf268a18b7c086cf871f39adf9247f07e32..7217f3968d51d9061b14bd46c473329b26bb087c 100755 (executable)
--- a/t/t7610-mergetool.sh
+++ b/t/t7610-mergetool.sh
@@ -589,7 +589,12 @@ test_expect_success 'filenames seen by tools start with ./' '
        git reset --hard master >/dev/null 2>&1
 '
 
-test_expect_success 'temporary filenames are used with mergetool.writeToTemp' '
+test_lazy_prereq MKTEMP '
+       tempdir=$(mktemp -d -t foo.XXXXXX) &&
+       test -d "$tempdir"
+'
+
+test_expect_success MKTEMP 'temporary filenames are used with mergetool.writeToTemp' '
        git checkout -b test16 branch1 &&
        test_config mergetool.writeToTemp true &&
        test_config mergetool.myecho.cmd "echo \"\$LOCAL\"" &&