[PATCH v4 39/45] add tests for rebasing with patch-equivalence present

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From: Martin von Zweigbergk <martinvonz@xxxxxxxxx>

Signed-off-by: Martin von Zweigbergk <martinvonz@xxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
 t/lib-rebase.sh                   | 17 ++++++++
 t/t3421-rebase-topology-linear.sh | 85 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+)

diff --git a/t/lib-rebase.sh b/t/lib-rebase.sh
index 1e0ff28..4b74ae4 100644
--- a/t/lib-rebase.sh
+++ b/t/lib-rebase.sh
@@ -81,3 +81,20 @@ reset_rebase () {
 	git reset --hard &&
 	git clean -f
 }
+
+cherry_pick () {
+	git cherry-pick -n "$2" &&
+	git commit -m "$1" &&
+	git tag "$1"
+}
+
+revert () {
+	git revert -n "$2" &&
+	git commit -m "$1" &&
+	git tag "$1"
+}
+
+make_empty () {
+	git commit --allow-empty -m "$1" &&
+	git tag "$1"
+}
diff --git a/t/t3421-rebase-topology-linear.sh b/t/t3421-rebase-topology-linear.sh
index 60365d1..ddcbfc6 100755
--- a/t/t3421-rebase-topology-linear.sh
+++ b/t/t3421-rebase-topology-linear.sh
@@ -75,4 +75,89 @@ test_run_rebase success -m
 test_run_rebase success -i
 test_run_rebase success -p
 
+#       f
+#      /
+# a---b---c---g---h
+#      \
+#       d---G---i
+#
+# uppercase = cherry-picked
+# h = reverted g
+#
+# Reverted patches are there for tests to be able to check if a commit
+# that introduced the same change as another commit is
+# dropped. Without reverted commits, we could get false positives
+# because applying the patch succeeds, but simply results in no
+# changes.
+test_expect_success 'setup of linear history for range selection tests' '
+	git checkout c &&
+	test_commit g &&
+	revert h g &&
+	git checkout d &&
+	cherry_pick G g &&
+	test_commit i &&
+	git checkout b &&
+	test_commit f
+'
+
+test_run_rebase () {
+	result=$1
+	shift
+	test_expect_$result "rebase $* drops patches in upstream" "
+		reset_rebase &&
+		git rebase $* h i &&
+		test_cmp_rev h HEAD~2 &&
+		test_linear_range 'd i' h..
+	"
+}
+test_run_rebase success ''
+test_run_rebase failure -m
+test_run_rebase success -i
+test_run_rebase success -p
+
+test_run_rebase () {
+	result=$1
+	shift
+	test_expect_$result "rebase $* can drop last patch if in upstream" "
+		reset_rebase &&
+		git rebase $* h G &&
+		test_cmp_rev h HEAD^ &&
+		test_linear_range 'd' h..
+	"
+}
+test_run_rebase success ''
+test_run_rebase failure -m
+test_run_rebase success -i
+test_run_rebase success -p
+
+test_run_rebase () {
+	result=$1
+	shift
+	test_expect_$result "rebase $* --onto drops patches in upstream" "
+		reset_rebase &&
+		git rebase $* --onto f h i &&
+		test_cmp_rev f HEAD~2 &&
+		test_linear_range 'd i' f..
+	"
+}
+test_run_rebase success ''
+test_run_rebase failure -m
+test_run_rebase success -i
+test_run_rebase success -p
+
+test_run_rebase () {
+	result=$1
+	shift
+	test_expect_$result "rebase $* --onto does not drop patches in onto" "
+		reset_rebase &&
+		git rebase $* --onto h f i &&
+		test_cmp_rev h HEAD~3 &&
+		test_linear_range 'd G i' h..
+	"
+}
+test_run_rebase success ''
+test_run_rebase success -m
+test_run_rebase success -i
+test_run_rebase success -p
+
 test_done
-- 
1.8.3.698.g079b096

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