Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
t/t6043-merge-rename-directories.sh | 442 ++++++++++++++++++++++++++++++++++++
1 file changed, 442 insertions(+)
create mode 100755 t/t6043-merge-rename-directories.sh
diff --git a/t/t6043-merge-rename-directories.sh b/t/t6043-merge-rename-directories.sh
new file mode 100755
index 0000000000..d045f0e31e
--- /dev/null
+++ b/t/t6043-merge-rename-directories.sh
@@ -0,0 +1,442 @@
+#!/bin/sh
+
+test_description="recursive merge with directory renames"
+# includes checking of many corner cases, with a similar methodology to:
+# t6042: corner cases with renames but not criss-cross merges
+# t6036: corner cases with both renames and criss-cross merges
+#
+# The setup for all of them, pictorially, is:
+#
+# A
+# o
+# / \
+# O o ?
+# \ /
+# o
+# B
+#
+# To help make it easier to follow the flow of tests, they have been
+# divided into sections and each test will start with a quick explanation
+# of what commits O, A, and B contain.
+#
+# Notation:
+# z/{b,c} means files z/b and z/c both exist
+# x/d_1 means file x/d exists with content d1. (Purpose of the
+# underscore notation is to differentiate different
+# files that might be renamed into each other's paths.)
+
+. ./test-lib.sh
+
+
+###########################################################################
+# SECTION 1: Basic cases we should be able to handle
+###########################################################################
+
+# Testcase 1a, Basic directory rename.
+# Commit O: z/{b,c}
+# Commit A: y/{b,c}
+# Commit B: z/{b,c,d,e/f}
+# Expected: y/{b,c,d,e/f}
+
+test_expect_success '1a-setup: Simple directory rename detection' '
+ test_create_repo 1a &&
+ (
+ cd 1a &&
+
+ 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 &&
+ git mv z y &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git checkout B &&
+ echo d >z/d &&
+ mkdir z/e &&
+ echo f >z/e/f &&
+ git add z/d z/e/f &&
+ test_tick &&
+ git commit -m "B"
+ )
+'
+
+test_expect_failure '1a-check: Simple directory rename detection' '
+ (
+ cd 1a &&
+
+ git checkout A^0 &&
+
+ git merge -s recursive B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 4 out &&
+
+ git rev-parse >actual \
+ HEAD:y/b HEAD:y/c HEAD:y/d HEAD:y/e/f &&
+ git rev-parse >expect \
+ O:z/b O:z/c B:z/d B:z/e/f &&
+ test_cmp expect actual &&
+
+ git hash-object y/d >actual &&
+ git rev-parse B:z/d >expect &&
+ test_cmp expect actual &&
+
+ test_must_fail git rev-parse HEAD:z/d &&
+ test_must_fail git rev-parse HEAD:z/e/f &&
+ test_path_is_missing z/d &&
+ test_path_is_missing z/e/f
+ )
+'
+
+# Testcase 1b, Merge a directory with another
+# Commit O: z/{b,c}, y/d
+# Commit A: z/{b,c,e}, y/d
+# Commit B: y/{b,c,d}
+# Expected: y/{b,c,d,e}
+
+test_expect_success '1b-setup: Merge a directory with another' '
+ test_create_repo 1b &&
+ (
+ cd 1b &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir y &&
+ echo d >y/d &&
+ git add z y &&
+ test_tick &&
+ git commit -m "O" &&
+
+ git branch O &&
+ git branch A &&
+ git branch B &&
+
+ git checkout A &&
+ echo e >z/e &&
+ git add z/e &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git checkout B &&
+ git mv z/b y &&
+ git mv z/c y &&
+ rmdir z &&
+ test_tick &&
+ git commit -m "B"
+ )
+'
+
+test_expect_failure '1b-check: Merge a directory with another' '
+ (
+ cd 1b &&
+
+ git checkout A^0 &&
+
+ git merge -s recursive B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 4 out &&
+
+ git rev-parse >actual \
+ HEAD:y/b HEAD:y/c HEAD:y/d HEAD:y/e &&
+ git rev-parse >expect \
+ O:z/b O:z/c O:y/d A:z/e &&
+ test_cmp expect actual &&
+ test_must_fail git rev-parse HEAD:z/e
+ )
+'
+
+# Testcase 1c, Transitive renaming
+# (Related to testcases 3a and 6d -- when should a transitive rename apply?)
+# (Related to testcases 9c and 9d -- can transitivity repeat?)
+# Commit O: z/{b,c}, x/d
+# Commit A: y/{b,c}, x/d
+# Commit B: z/{b,c,d}
+# Expected: y/{b,c,d} (because x/d -> z/d -> y/d)
+
+test_expect_success '1c-setup: Transitive renaming' '
+ test_create_repo 1c &&
+ (
+ cd 1c &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir x &&
+ echo d >x/d &&
+ git add z x &&
+ test_tick &&
+ git commit -m "O" &&
+
+ git branch O &&
+ git branch A &&
+ git branch B &&
+
+ git checkout A &&
+ git mv z y &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git checkout B &&
+ git mv x/d z/d &&
+ test_tick &&
+ git commit -m "B"
+ )
+'
+
+test_expect_failure '1c-check: Transitive renaming' '
+ (
+ cd 1c &&
+
+ git checkout A^0 &&
+
+ git merge -s recursive B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 3 out &&
+
+ git rev-parse >actual \
+ HEAD:y/b HEAD:y/c HEAD:y/d &&
+ git rev-parse >expect \
+ O:z/b O:z/c O:x/d &&
+ test_cmp expect actual &&
+ test_must_fail git rev-parse HEAD:x/d &&
+ test_must_fail git rev-parse HEAD:z/d &&
+ test_path_is_missing z/d
+ )
+'
+
+# Testcase 1d, Directory renames (merging two directories into one new one)
+# cause a rename/rename(2to1) conflict
+# (Related to testcases 1c and 7b)
+# Commit O. z/{b,c}, y/{d,e}
+# Commit A. x/{b,c}, y/{d,e,m,wham_1}
+# Commit B. z/{b,c,n,wham_2}, x/{d,e}
+# Expected: x/{b,c,d,e,m,n}, CONFLICT:(y/wham_1 & z/wham_2 -> x/wham)
+# Note: y/m & z/n should definitely move into x. By the same token, both
+# y/wham_1 & z/wham_2 should too...giving us a conflict.
+
+test_expect_success '1d-setup: Directory renames cause a rename/rename(2to1) conflict' '
+ test_create_repo 1d &&
+ (
+ cd 1d &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ mkdir y &&
+ echo d >y/d &&
+ echo e >y/e &&
+ git add z y &&
+ test_tick &&
+ git commit -m "O" &&
+
+ git branch O &&
+ git branch A &&
+ git branch B &&
+
+ git checkout A &&
+ git mv z x &&
+ echo m >y/m &&
+ echo wham1 >y/wham &&
+ git add y &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git checkout B &&
+ git mv y x &&
+ echo n >z/n &&
+ echo wham2 >z/wham &&
+ git add z &&
+ test_tick &&
+ git commit -m "B"
+ )
+'
+
+test_expect_failure '1d-check: Directory renames cause a rename/rename(2to1) conflict' '
+ (
+ cd 1d &&
+
+ git checkout A^0 &&
+
+ test_must_fail git merge -s recursive B^0 >out &&
+ test_i18ngrep "CONFLICT (rename/rename)" out &&
+
+ git ls-files -s >out &&
+ test_line_count = 8 out &&
+ git ls-files -u >out &&
+ test_line_count = 2 out &&
+ git ls-files -o >out &&
+ test_line_count = 3 out &&
+
+ git rev-parse >actual \
+ :0:x/b :0:x/c :0:x/d :0:x/e :0:x/m :0:x/n &&
+ git rev-parse >expect \
+ O:z/b O:z/c O:y/d O:y/e A:y/m B:z/n &&
+ test_cmp expect actual &&
+
+ test_must_fail git rev-parse :0:x/wham &&
+ git rev-parse >actual \
+ :2:x/wham :3:x/wham &&
+ git rev-parse >expect \
+ A:y/wham B:z/wham &&
+ test_cmp expect actual &&
+
+ test_path_is_missing x/wham &&
+ test_path_is_file x/wham~HEAD &&
+ test_path_is_file x/wham~B^0 &&
+
+ git hash-object >actual \
+ x/wham~HEAD x/wham~B^0 &&
+ git rev-parse >expect \
+ A:y/wham B:z/wham &&
+ test_cmp expect actual
+ )
+'
+
+# Testcase 1e, Renamed directory, with all filenames being renamed too
+# Commit O: z/{oldb,oldc}
+# Commit A: y/{newb,newc}
+# Commit B: z/{oldb,oldc,d}
+# Expected: y/{newb,newc,d}
+
+test_expect_success '1e-setup: Renamed directory, with all files being renamed too' '
+ test_create_repo 1e &&
+ (
+ cd 1e &&
+
+ mkdir z &&
+ echo b >z/oldb &&
+ echo c >z/oldc &&
+ git add z &&
+ test_tick &&
+ git commit -m "O" &&
+
+ git branch O &&
+ git branch A &&
+ git branch B &&
+
+ git checkout A &&
+ mkdir y &&
+ git mv z/oldb y/newb &&
+ git mv z/oldc y/newc &&
+ 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 '1e-check: Renamed directory, with all files being renamed too' '
+ (
+ cd 1e &&
+
+ git checkout A^0 &&
+
+ git merge -s recursive B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 3 out &&
+
+ git rev-parse >actual \
+ HEAD:y/newb HEAD:y/newc HEAD:y/d &&
+ git rev-parse >expect \
+ O:z/oldb O:z/oldc B:z/d &&
+ test_cmp expect actual &&
+ test_must_fail git rev-parse HEAD:z/d
+ )
+'
+
+# Testcase 1f, Split a directory into two other directories
+# (Related to testcases 3a, all of section 2, and all of section 4)
+# Commit O: z/{b,c,d,e,f}
+# Commit A: z/{b,c,d,e,f,g}
+# Commit B: y/{b,c}, x/{d,e,f}
+# Expected: y/{b,c}, x/{d,e,f,g}
+
+test_expect_success '1f-setup: Split a directory into two other directories' '
+ test_create_repo 1f &&
+ (
+ cd 1f &&
+
+ mkdir z &&
+ echo b >z/b &&
+ echo c >z/c &&
+ echo d >z/d &&
+ echo e >z/e &&
+ echo f >z/f &&
+ git add z &&
+ test_tick &&
+ git commit -m "O" &&
+
+ git branch O &&
+ git branch A &&
+ git branch B &&
+
+ git checkout A &&
+ echo g >z/g &&
+ git add z/g &&
+ test_tick &&
+ git commit -m "A" &&
+
+ git checkout B &&
+ mkdir y &&
+ mkdir x &&
+ git mv z/b y/ &&
+ git mv z/c y/ &&
+ git mv z/d x/ &&
+ git mv z/e x/ &&
+ git mv z/f x/ &&
+ rmdir z &&
+ test_tick &&
+ git commit -m "B"
+ )
+'
+
+test_expect_failure '1f-check: Split a directory into two other directories' '
+ (
+ cd 1f &&
+
+ git checkout A^0 &&
+
+ git merge -s recursive B^0 &&
+
+ git ls-files -s >out &&
+ test_line_count = 6 out &&
+
+ git rev-parse >actual \
+ HEAD:y/b HEAD:y/c HEAD:x/d HEAD:x/e HEAD:x/f HEAD:x/g &&
+ git rev-parse >expect \
+ O:z/b O:z/c O:z/d O:z/e O:z/f A:z/g &&
+ test_cmp expect actual &&
+ test_path_is_missing z/g &&
+ test_must_fail git rev-parse HEAD:z/g
+ )
+'
+
+###########################################################################
+# Rules suggested by testcases in section 1:
+#
+# We should still detect the directory rename even if it wasn't just
+# the directory renamed, but the files within it. (see 1b)
+#
+# If renames split a directory into two or more others, the directory
+# with the most renames, "wins" (see 1c). However, see the testcases
+# in section 2, plus testcases 3a and 4a.
+###########################################################################
+
+test_done
--
2.16.1.106.gf69932adfe
