[PATCHv2 4/7] t7008: demonstrate behavior of grep with textconv

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Currently, "git grep" does not honor any textconv filters. Demonstrate
this in the tests.

Signed-off-by: Michael J Gruber <git@xxxxxxxxxxxxxxxxxxxx>
---
 t/t7008-grep-binary.sh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/t/t7008-grep-binary.sh b/t/t7008-grep-binary.sh
index 26f8319..126fe4c 100755
--- a/t/t7008-grep-binary.sh
+++ b/t/t7008-grep-binary.sh
@@ -145,4 +145,27 @@ test_expect_success 'grep respects not-binary diff attribute' '
 	test_cmp expect actual
 '
 
+cat >nul_to_q_textconv <<'EOF'
+#!/bin/sh
+"$PERL_PATH" -pe 'y/\000/Q/' < "$1"
+EOF
+chmod +x nul_to_q_textconv
+
+test_expect_success 'setup textconv filters' '
+	echo a diff=foo >.gitattributes &&
+	git config diff.foo.textconv "\"$(pwd)\""/nul_to_q_textconv
+'
+
+test_expect_failure 'grep does not honor textconv' '
+	echo "a:binaryQfile" >expect &&
+	git grep Qfile >actual &&
+	test_cmp expect actual
+'
+
+test_expect_failure 'grep blob does not honor textconv' '
+	echo "HEAD:a:binaryQfile" >expect &&
+	git grep Qfile HEAD:a >actual &&
+	test_cmp expect actual
+'
+
 test_done
-- 
1.8.2.1.799.g1ac2534

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