t1404: make D/F conflict tests compatible with reftable backend

Some of the tests in t1404 exercise whether Git correctly aborts
transactions when there is a directory/file conflict with ref names.
While these tests are all marked to require the "files" backend, they do
in fact apply to the "reftable" backend as well.

This may not make much sense on the surface: D/F conflicts only exist
because the "files" backend uses the filesystem to store loose refs, and
thus the restriction theoretically shouldn't apply to the "reftable"
backend. But for now, the "reftable" backend artificially restricts the
creation of such conflicting refs so that it is a drop-in replacement
for the "files" backend. This also ensures that the "reftable" backend
can easily be used on the server side without causing issues for clients
which only know to use the "files" backend.

The only difference between the "files" and "reftable" backends is a
slightly different error message. Adapt the tests to accomodate for this
difference and remove the REFFILES prerequisite so that we start testing
with both backends.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

t/t1404-update-ref-errors.sh

@@ -92,9 +92,6 @@ df_test() {
 	else
 		delname="$delref"
 	fi &&
-	cat >expected-err <<-EOF &&
-	fatal: cannot lock ref $SQ$addname$SQ: $SQ$delref$SQ exists; cannot create $SQ$addref$SQ
-	EOF
 	$pack &&
 	if $add_del
 	then
@@ -103,7 +100,7 @@ df_test() {
 		printf "%s\n" "delete $delname" "create $addname $D"
 	fi >commands &&
 	test_must_fail git update-ref --stdin <commands 2>output.err &&
-	test_cmp expected-err output.err &&
+	grep "fatal:\( cannot lock ref $SQ$addname$SQ:\)\? $SQ$delref$SQ exists; cannot create $SQ$addref$SQ" output.err &&
 	printf "%s\n" "$C $delref" >expected-refs &&
 	git for-each-ref --format="%(objectname) %(refname)" $prefix/r >actual-refs &&
 	test_cmp expected-refs actual-refs
@@ -191,69 +188,69 @@ test_expect_success 'one new ref is a simple prefix of another' '
 
 '
 
-test_expect_success REFFILES 'D/F conflict prevents add long + delete short' '
+test_expect_success 'D/F conflict prevents add long + delete short' '
 	df_test refs/df-al-ds --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents add short + delete long' '
+test_expect_success 'D/F conflict prevents add short + delete long' '
 	df_test refs/df-as-dl --add-del foo foo/bar
 '
 
-test_expect_success REFFILES 'D/F conflict prevents delete long + add short' '
+test_expect_success 'D/F conflict prevents delete long + add short' '
 	df_test refs/df-dl-as --del-add foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents delete short + add long' '
+test_expect_success 'D/F conflict prevents delete short + add long' '
 	df_test refs/df-ds-al --del-add foo foo/bar
 '
 
-test_expect_success REFFILES 'D/F conflict prevents add long + delete short packed' '
+test_expect_success 'D/F conflict prevents add long + delete short packed' '
 	df_test refs/df-al-dsp --pack --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents add short + delete long packed' '
+test_expect_success 'D/F conflict prevents add short + delete long packed' '
 	df_test refs/df-as-dlp --pack --add-del foo foo/bar
 '
 
-test_expect_success REFFILES 'D/F conflict prevents delete long packed + add short' '
+test_expect_success 'D/F conflict prevents delete long packed + add short' '
 	df_test refs/df-dlp-as --pack --del-add foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents delete short packed + add long' '
+test_expect_success 'D/F conflict prevents delete short packed + add long' '
 	df_test refs/df-dsp-al --pack --del-add foo foo/bar
 '
 
 # Try some combinations involving symbolic refs...
 
-test_expect_success REFFILES 'D/F conflict prevents indirect add long + delete short' '
+test_expect_success 'D/F conflict prevents indirect add long + delete short' '
 	df_test refs/df-ial-ds --sym-add --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect add long + indirect delete short' '
+test_expect_success 'D/F conflict prevents indirect add long + indirect delete short' '
 	df_test refs/df-ial-ids --sym-add --sym-del --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect add short + indirect delete long' '
+test_expect_success 'D/F conflict prevents indirect add short + indirect delete long' '
 	df_test refs/df-ias-idl --sym-add --sym-del --add-del foo foo/bar
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect delete long + indirect add short' '
+test_expect_success 'D/F conflict prevents indirect delete long + indirect add short' '
 	df_test refs/df-idl-ias --sym-add --sym-del --del-add foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect add long + delete short packed' '
+test_expect_success 'D/F conflict prevents indirect add long + delete short packed' '
 	df_test refs/df-ial-dsp --sym-add --pack --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect add long + indirect delete short packed' '
+test_expect_success 'D/F conflict prevents indirect add long + indirect delete short packed' '
 	df_test refs/df-ial-idsp --sym-add --sym-del --pack --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents add long + indirect delete short packed' '
+test_expect_success 'D/F conflict prevents add long + indirect delete short packed' '
 	df_test refs/df-al-idsp --sym-del --pack --add-del foo/bar foo
 '
 
-test_expect_success REFFILES 'D/F conflict prevents indirect delete long packed + indirect add short' '
+test_expect_success 'D/F conflict prevents indirect delete long packed + indirect add short' '
 	df_test refs/df-idlp-ias --sym-add --sym-del --pack --del-add foo/bar foo
 '