[PATCH v8 5/7] bisect: add tests for the --no-checkout and --update-ref options.

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These tests verify that git-bisect --no-checkout can successfully
bisect commit histories that reference damaged trees.

Signed-off-by: Jon Seymour <jon.seymour@xxxxxxxxx>
---
 t/t6030-bisect-porcelain.sh |   90 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 90 insertions(+), 0 deletions(-)

diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index 9ae2de8..69d77fa 100755
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -616,6 +616,14 @@ cat > expected.missing-tree.default <<EOF
 fatal: unable to read tree 39f7e61a724187ab767d2e08442d9b6b9dab587d
 EOF
 
+check_same()
+{
+    echo "Checking $1 is the same as $2" &&
+    git rev-parse "$1" > expected.same &&
+    git rev-parse "$2" > expected.actual &&
+    test_cmp expected.same expected.actual
+}
+
 test_expect_success 'bisect fails if tree is broken on start commit' '
 	git bisect reset &&
 	test_must_fail git bisect start BROKEN_HASH7 BROKEN_HASH4 2>error.txt &&
@@ -630,4 +638,86 @@ test_expect_success 'bisect fails if tree is broken on trial commit' '
 	test_cmp expected.missing-tree.default error.txt
 '
 
+test_expect_success 'bisect: --no-checkout - start commit bad' '
+	git bisect reset &&
+	git bisect start BROKEN_HASH7 BROKEN_HASH4 --no-checkout &&
+	check_same BROKEN_HASH6 HEAD &&
+	git bisect reset
+'
+
+test_expect_success 'bisect: --no-checkout - trial commit bad' '
+	git bisect reset &&
+	git bisect start broken BROKEN_HASH4 --no-checkout &&
+	check_same BROKEN_HASH6 HEAD &&
+	git bisect reset
+'
+
+test_expect_success 'bisect: --no-checkout - target before breakage' '
+	git bisect reset &&
+	git bisect start broken BROKEN_HASH4 --no-checkout &&
+	check_same BROKEN_HASH6 HEAD &&
+	git bisect bad HEAD &&
+	check_same BROKEN_HASH5 HEAD &&
+	git bisect bad HEAD &&
+	check_same BROKEN_HASH5 bisect/bad &&
+	git bisect reset
+'
+
+test_expect_success 'bisect: --no-checkout - target in breakage' '
+	git bisect reset &&
+	git bisect start broken BROKEN_HASH4 --no-checkout &&
+	check_same BROKEN_HASH6 HEAD &&
+	git bisect bad HEAD &&
+	check_same BROKEN_HASH5 HEAD &&
+	git bisect good HEAD &&
+	check_same BROKEN_HASH6 bisect/bad &&
+	git bisect reset
+'
+
+test_expect_success 'bisect: --no-checkout - target after breakage' '
+	git bisect reset &&
+	git bisect start broken BROKEN_HASH4 --no-checkout &&
+	check_same BROKEN_HASH6 HEAD &&
+	git bisect good HEAD &&
+	check_same BROKEN_HASH8 HEAD &&
+	git bisect good HEAD &&
+	check_same BROKEN_HASH9 bisect/bad &&
+	git bisect reset
+'
+
+test_expect_success 'bisect: --no-checkout --update-ref=CURSOR - check HEAD is unmodified' '
+	git bisect reset &&
+	git checkout broken &&
+	BROKEN=$(git rev-parse broken) &&
+	git bisect start broken BROKEN_HASH4 --no-checkout --update-ref=CURSOR &&
+	check_same CURSOR BROKEN_HASH6 &&
+	test "refs/heads/broken" = "$(git rev-parse --symbolic-full-name HEAD)" &&
+	git bisect bad CURSOR &&
+	test "refs/heads/broken" = "$(git rev-parse --symbolic-full-name HEAD)" &&
+	check_same CURSOR BROKEN_HASH5 &&
+	test "refs/heads/broken" = "$(git rev-parse --symbolic-full-name HEAD)" &&
+	git bisect good CURSOR &&
+	check_same BROKEN_HASH6 bisect/bad &&
+	test "refs/heads/broken" = "$(git rev-parse --symbolic-full-name HEAD)" &&
+	git bisect reset &&
+	test "refs/heads/broken" = "$(git rev-parse --symbolic-full-name HEAD)" &&
+	check_same HEAD broken &&
+	check_same broken $BROKEN
+'
+
+test_expect_success 'bisect: demonstrate identification of damage boundary' "
+	git bisect reset &&
+	git checkout broken &&
+	git bisect start broken master --no-checkout &&
+	git bisect run eval '
+rc=1;
+if git rev-list --objects HEAD >tmp.$$; then
+   git pack-objects --stdout >/dev/null < tmp.$$ && rc=0;
+fi;
+rm tmp.$$;
+test \$rc -eq 0;' &&
+	check_same BROKEN_HASH6 bisect/bad &&
+	git bisect reset
+"
+
 test_done
-- 
1.7.6.391.g168d0.dirty

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