test-lib: add in-shell "env" replacement

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index 718efa04d34df1f867a37d7b3073f1463457455b..7bac2bcf260794bbfeb795b210ed0c9eceb45937 100755 (executable)
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -252,4 +252,20 @@ test_expect_success "filter: smudge empty file" '
        test_cmp expected filtered-empty-in-repo
 '
 
+test_expect_success 'disable filter with empty override' '
+       test_config_global filter.disable.smudge false &&
+       test_config_global filter.disable.clean false &&
+       test_config filter.disable.smudge false &&
+       test_config filter.disable.clean false &&
+
+       echo "*.disable filter=disable" >.gitattributes &&
+
+       echo test >test.disable &&
+       git -c filter.disable.clean= add test.disable 2>err &&
+       test_must_be_empty err &&
+       rm -f test.disable &&
+       git -c filter.disable.smudge= checkout -- test.disable 2>err &&
+       test_must_be_empty err
+'
+
 test_done