[PATCH 4/4] blame: test the -b option, use blank oid for boundary commits.

[Philip Oakley <philipoakley@iee.email>]

4c10a5caa7 (blame: -b (blame.blankboundary) and --root (blame.showroot),
2006-12-18) introduced the -b option. Add a test.

The sed script removes the last hex digit from boundary commit oids
'^hexx msg' -> '^hex  msg' until all leading hex's are gone, finally
removing the boundary commit marker.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
---
 t/t8002-blame.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/t/t8002-blame.sh b/t/t8002-blame.sh
index d4877c7c54..de0f81abe9 100755
--- a/t/t8002-blame.sh
+++ b/t/t8002-blame.sh
@@ -129,4 +129,16 @@ test_expect_success 'test --blame-only, exclude boundary commits' '
 	test_cmp expected actual
 '
 
+test_expect_success 'test -b option, blank oid for boundary commits' '
+	git blame -b branch1.. -- file >actual &&
+	git blame branch1.. -- file >full &&
+	sed -e "/^\^/{
+		:loop;
+		s/^\(\^[0-9a-f]*\)[0-9a-f] \(.*\)/\1  \2/g;
+		tloop;
+		s/^\^/ /;
+	}" full >expected &&
+	test_cmp expected actual
+'
+
 test_done
-- 
2.26.2.windows.1.13.g9dddff6983