Signed-off-by: Elijah Newren <new...@gmail.com>
---
 t/t6043-merge-rename-directories.sh | 137 ++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)

diff --git a/t/t6043-merge-rename-directories.sh 
b/t/t6043-merge-rename-directories.sh
index d8ead7c56b..335aa1c145 100755
--- a/t/t6043-merge-rename-directories.sh
+++ b/t/t6043-merge-rename-directories.sh
@@ -427,4 +427,141 @@ 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 3 -eq $(git ls-files -s | wc -l) &&
+               test 0 -eq $(git ls-files -u | wc -l) &&
+               test 1 -eq $(git ls-files -o | wc -l) &&
+
+               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 &&
+               test_i18ngrep "CONFLICT.*directory rename split" out
+       )
+'
+
+# 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 &&
+
+               test 3 -eq $(git ls-files -s | wc -l) &&
+               test 0 -eq $(git ls-files -u | wc -l) &&
+               test 1 -eq $(git ls-files -o | wc -l) &&
+
+               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
-- 
2.15.0.309.g62ce55426d

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