[PATCHv6 02/31] directory rename detection: directory splitting testcases

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Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
 t/t6043-merge-rename-directories.sh | 143 ++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)

diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
index c68ae87f1..f36493289 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -439,4 +439,147 @@ test_expect_failure '1f-check: Split a directory into two other directories' '
 #   in section 2, plus testcases 3a and 4a.
 ###########################################################################
 
+
+###########################################################################
+# SECTION 2: Split into multiple directories, with equal number of paths
+#
+# Explore the splitting-a-directory rules a bit; what happens in the
+# edge cases?
+#
+# Note that there is a closely related case of a directory not being
+# split on either side of history, but being renamed differently on
+# each side.  See testcase 8e for that.
+###########################################################################
+
+# Testcase 2a, Directory split into two on one side, with equal numbers of paths
+#   Commit O: z/{b,c}
+#   Commit A: y/b, w/c
+#   Commit B: z/{b,c,d}
+#   Expected: y/b, w/c, z/d, with warning about z/ -> (y/ vs. w/) conflict
+test_expect_success '2a-setup: Directory split into two on one side, with equal numbers of paths' '
+	test_create_repo 2a &&
+	(
+		cd 2a &&
+
+		mkdir z &&
+		echo b >z/b &&
+		echo c >z/c &&
+		git add z &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		mkdir y &&
+		mkdir w &&
+		git mv z/b y/ &&
+		git mv z/c w/ &&
+		test_tick &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		echo d >z/d &&
+		git add z/d &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_failure '2a-check: Directory split into two on one side, with equal numbers of paths' '
+	(
+		cd 2a &&
+
+		git checkout A^0 &&
+
+		test_must_fail git merge -s recursive B^0 >out &&
+		test_i18ngrep "CONFLICT.*directory rename split" out &&
+
+		git ls-files -s >out &&
+		test_line_count = 3 out &&
+		git ls-files -u >out &&
+		test_line_count = 0 out &&
+		git ls-files -o >out &&
+		test_line_count = 1 out &&
+
+		git rev-parse >actual \
+			:0:y/b :0:w/c :0:z/d &&
+		git rev-parse >expect \
+			O:z/b O:z/c B:z/d &&
+		test_cmp expect actual
+	)
+'
+
+# Testcase 2b, Directory split into two on one side, with equal numbers of paths
+#   Commit O: z/{b,c}
+#   Commit A: y/b, w/c
+#   Commit B: z/{b,c}, x/d
+#   Expected: y/b, w/c, x/d; No warning about z/ -> (y/ vs. w/) conflict
+test_expect_success '2b-setup: Directory split into two on one side, with equal numbers of paths' '
+	test_create_repo 2b &&
+	(
+		cd 2b &&
+
+		mkdir z &&
+		echo b >z/b &&
+		echo c >z/c &&
+		git add z &&
+		test_tick &&
+		git commit -m "O" &&
+
+		git branch O &&
+		git branch A &&
+		git branch B &&
+
+		git checkout A &&
+		mkdir y &&
+		mkdir w &&
+		git mv z/b y/ &&
+		git mv z/c w/ &&
+		test_tick &&
+		git commit -m "A" &&
+
+		git checkout B &&
+		mkdir x &&
+		echo d >x/d &&
+		git add x/d &&
+		test_tick &&
+		git commit -m "B"
+	)
+'
+
+test_expect_success '2b-check: Directory split into two on one side, with equal numbers of paths' '
+	(
+		cd 2b &&
+
+		git checkout A^0 &&
+
+		git merge -s recursive B^0 >out &&
+
+		git ls-files -s >out &&
+		test_line_count = 3 out &&
+		git ls-files -u >out &&
+		test_line_count = 0 out &&
+		git ls-files -o >out &&
+		test_line_count = 1 out &&
+
+		git rev-parse >actual \
+			:0:y/b :0:w/c :0:x/d &&
+		git rev-parse >expect \
+			O:z/b O:z/c B:x/d &&
+		test_cmp expect actual &&
+		test_i18ngrep ! "CONFLICT.*directory rename split" out
+	)
+'
+
+###########################################################################
+# Rules suggested by section 2:
+#
+#   None; the rule was already covered in section 1.  These testcases are
+#   here just to make sure the conflict resolution and necessary warning
+#   messages are handled correctly.
+###########################################################################
+
 test_done
-- 
2.14.2




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