modernize t9300: use test_must_fail

One test case open-codes a test for an expected failure. Replace it by
test_must_fail.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Jeff King <peff@peff.net>

diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 566f7bdd30436006615aa882d67531c29e41f3b2..e9c760284950ee990224d45a22eae72f3e65205c 100755 (executable)
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -630,20 +630,9 @@ from refs/heads/branch
 
 INPUT_END
 test_expect_success 'F: non-fast-forward update skips' '
-       if git fast-import <input
-       then
-               echo BAD gfi did not fail
-               return 1
-       else
-               if test $old_branch = `git rev-parse --verify branch^0`
-               then
-                       : branch unaffected and failure returned
-                       return 0
-               else
-                       echo BAD gfi changed branch $old_branch
-                       return 1
-               fi
-       fi
+       test_must_fail git fast-import <input &&
+       # branch must remain unaffected
+       test $old_branch = `git rev-parse --verify branch^0`
 '
 
 test_expect_success 'F: verify pack' '