Adding upstream version 1:2.43.0.upstream/1%2.43.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 791 insertions, 0 deletions

diff --git a/t/t3309-notes-merge-auto-resolve.sh b/t/t3309-notes-merge-auto-resolve.sh
new file mode 100755
index 0000000..9bd5dbf
--- /dev/null
+++ b/t/t3309-notes-merge-auto-resolve.sh
@@ -0,0 +1,791 @@
+#!/bin/sh
+#
+# Copyright (c) 2010 Johan Herland
+#
+
+test_description='Test notes merging with auto-resolving strategies'
+
+. ./test-lib.sh
+
+# Set up a notes merge scenario with all kinds of potential conflicts
+test_expect_success 'setup commits' '
+	test_commit 1st &&
+	test_commit 2nd &&
+	test_commit 3rd &&
+	test_commit 4th &&
+	test_commit 5th &&
+	test_commit 6th &&
+	test_commit 7th &&
+	test_commit 8th &&
+	test_commit 9th &&
+	test_commit 10th &&
+	test_commit 11th &&
+	test_commit 12th &&
+	test_commit 13th &&
+	test_commit 14th &&
+	test_commit 15th &&
+
+	test_oid_cache <<-EOF
+	hash15a sha1:457a85d6c814ea208550f15fcc48f804ac8dc023
+	hash14a sha1:b0c95b954301d69da2bc3723f4cb1680d355937c
+	hash13a sha1:5d30216a129eeffa97d9694ffe8c74317a560315
+	hash12a sha1:dd161bc149470fd890dd4ab52a4cbd79bbd18c36
+	hash11a sha1:7abbc45126d680336fb24294f013a7cdfa3ed545
+	hash10a sha1:b8d03e173f67f6505a76f6e00cf93440200dd9be
+	hash09a sha1:20c613c835011c48a5abe29170a2402ca6354910
+	hash08a sha1:a3daf8a1e4e5dc3409a303ad8481d57bfea7f5d6
+	hash07a sha1:897003322b53bc6ca098e9324ee508362347e734
+	hash06a sha1:11d97fdebfa5ceee540a3da07bce6fa0222bc082
+	hash15b sha1:68b8630d25516028bed862719855b3d6768d7833
+	hash14b sha1:5de7ea7ad4f47e7ff91989fb82234634730f75df
+	hash13b sha1:3a631fdb6f41b05b55d8f4baf20728ba8f6fccbc
+	hash12b sha1:a66055fa82f7a03fe0c02a6aba3287a85abf7c62
+	hash05b sha1:154508c7a0bcad82b6fe4b472bc4c26b3bf0825b
+	hash04b sha1:e2bfd06a37dd2031684a59a6e2b033e212239c78
+	hash03b sha1:5772f42408c0dd6f097a7ca2d24de0e78d1c46b1
+	hash15c sha1:9b4b2c61f0615412da3c10f98ff85b57c04ec765
+	hash11c sha1:7e3c53503a3db8dd996cb62e37c66e070b44b54d
+	hash08c sha1:851e1638784a884c7dd26c5d41f3340f6387413a
+	hash05c sha1:99fc34adfc400b95c67b013115e37e31aa9a6d23
+	hash02c sha1:283b48219aee9a4105f6cab337e789065c82c2b9
+	hash15d sha1:7c4e546efd0fe939f876beb262ece02797880b54
+	hash05d sha1:6c841cc36ea496027290967ca96bd2bef54dbb47
+	hash15e sha1:d682107b8bf7a7aea1e537a8d5cb6a12b60135f1
+	hash05e sha1:357b6ca14c7afd59b7f8b8aaaa6b8b723771135b
+	hash15f sha1:6be90240b5f54594203e25d9f2f64b7567175aee
+	hash05f sha1:660311d7f78dc53db12ac373a43fca7465381a7e
+
+	hash15a sha256:45b1558e5c1b75f570010fa48aaa67bb2289fcd431b34ad81cb4c8b95f4f872a
+	hash14a sha256:6e7af179ea4dd28afdc83ae6912ba0098cdeff764b26a8b750b157dd81749092
+	hash13a sha256:7353089961baf555388e1bac68c67c8ea94b08ccbd97532201cf7f6790703052
+	hash12a sha256:5863e4521689ee1879ceab3b38d39e93ab5b51ec70aaf6a96ad388fbdedfa25e
+	hash11a sha256:82a0ec0338b4ecf8b44304badf4ad38d7469dc41827f38d7ba6c42e3bae3ee98
+	hash10a sha256:e84f2564e92de9792c93b8d197262c735d7ccb1de6025cef8759af8f6c3308eb
+	hash09a sha256:4dd07764bcec696f195c0ea71ae89e174876403af1637e4642b8f4453fd23028
+	hash08a sha256:02132c4546cd88a1d0aa5854dd55da120927f7904ba16afe36fe03e91a622067
+	hash07a sha256:369baf7d00c6720efdc10273493555f943051f84a4706fb24caeb353fa4789db
+	hash06a sha256:52d32c10353583b2d96a5849b1f1f43c8018e76f3e8ef1b0d46eb5cff7cdefaf
+	hash15b sha256:345e6660b345fa174738a31a7a59423c394bdf414804e200bc510c65d971ae96
+	hash14b sha256:7653a6596021c52e405cba979eea15a729993e7102b9a61ba4667e34f0ead4a1
+	hash13b sha256:0f202a0b6b9690de2349c173dfd766a37e82744f61c14f1c389306f1d69f470b
+	hash12b sha256:eb00f219c026136ea6535b16ff8ec3efa510e6bf50098ca041e1a2a1d4b79840
+	hash05b sha256:993b2290cd0c24c27c849d99f1904f3b590f77af0f539932734ad05679ac5a2f
+	hash04b sha256:c7fba0d6104917fbf35258f40b9fa4fc697cfa992deecd1570a3b08d0a5587a9
+	hash03b sha256:7287a2d78a3766c181b08df38951d784b08b72a44f571ed6d855bd0be22c70f6
+	hash15c sha256:62316660a22bf97857dc4a16709ec4d93a224e8c9f37d661ef91751e1f4c4166
+	hash11c sha256:51c3763de9b08309370adc5036d58debb331980e73097902957c444602551daa
+	hash08c sha256:22cf1fa29599898a7218c51135d66ed85d22aad584f77db3305dedce4c3d4798
+	hash05c sha256:2508fd86db980f0508893a1c1571bdf3b2ee113dc25ddb1a3a2fb94bd6cd0d58
+	hash02c sha256:63bb527e0b4e1c8e1dd0d54dd778ca7c3718689fd6e37c473044cfbcf1cacfdb
+	hash15d sha256:667acb4e2d5f8df15e5aea4506dfd16d25bc7feca70fdb0d965a7222f983bb88
+	hash05d sha256:09e6b5a6fe666c4a027674b6611a254b7d2528cd211c6b5288d1b4db6c741dfa
+	hash15e sha256:e8cbf52f6fcadc6de3c7761e64a89e9fe38d19a03d3e28ef6ca8596d93fc4f3a
+	hash05e sha256:cdb1e19f7ba1539f95af51a57edeb88a7ecc97d3c2f52da8c4c86af308595607
+	hash15f sha256:29c14cb92da448a923963b8a43994268b19c2e57913de73f3667421fd2c0eeec
+	hash05f sha256:14a6e641b2c0a9f398ebac6b4d34afa5efea4c52d2631382f45f8f662266903b
+	EOF
+'
+
+commit_sha1=$(git rev-parse 1st^{commit})
+commit_sha2=$(git rev-parse 2nd^{commit})
+commit_sha3=$(git rev-parse 3rd^{commit})
+commit_sha4=$(git rev-parse 4th^{commit})
+commit_sha5=$(git rev-parse 5th^{commit})
+commit_sha6=$(git rev-parse 6th^{commit})
+commit_sha7=$(git rev-parse 7th^{commit})
+commit_sha8=$(git rev-parse 8th^{commit})
+commit_sha9=$(git rev-parse 9th^{commit})
+commit_sha10=$(git rev-parse 10th^{commit})
+commit_sha11=$(git rev-parse 11th^{commit})
+commit_sha12=$(git rev-parse 12th^{commit})
+commit_sha13=$(git rev-parse 13th^{commit})
+commit_sha14=$(git rev-parse 14th^{commit})
+commit_sha15=$(git rev-parse 15th^{commit})
+
+verify_notes () {
+	notes_ref="$1"
+	suffix="$2"
+	git -c core.notesRef="refs/notes/$notes_ref" notes |
+		sort >"output_notes_$suffix" &&
+	test_cmp "expect_notes_$suffix" "output_notes_$suffix" &&
+	git -c core.notesRef="refs/notes/$notes_ref" log --format="%H %s%n%N" \
+		>"output_log_$suffix" &&
+	test_cmp "expect_log_$suffix" "output_log_$suffix"
+}
+
+test_expect_success 'setup merge base (x)' '
+	git config core.notesRef refs/notes/x &&
+	git notes add -m "x notes on 6th commit" 6th &&
+	git notes add -m "x notes on 7th commit" 7th &&
+	git notes add -m "x notes on 8th commit" 8th &&
+	git notes add -m "x notes on 9th commit" 9th &&
+	git notes add -m "x notes on 10th commit" 10th &&
+	git notes add -m "x notes on 11th commit" 11th &&
+	git notes add -m "x notes on 12th commit" 12th &&
+	git notes add -m "x notes on 13th commit" 13th &&
+	git notes add -m "x notes on 14th commit" 14th &&
+	git notes add -m "x notes on 15th commit" 15th
+'
+
+cat <<EOF | sort >expect_notes_x
+$(test_oid hash15a) $commit_sha15
+$(test_oid hash14a) $commit_sha14
+$(test_oid hash13a) $commit_sha13
+$(test_oid hash12a) $commit_sha12
+$(test_oid hash11a) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash09a) $commit_sha9
+$(test_oid hash08a) $commit_sha8
+$(test_oid hash07a) $commit_sha7
+$(test_oid hash06a) $commit_sha6
+EOF
+
+cat >expect_log_x <<EOF
+$commit_sha15 15th
+x notes on 15th commit
+
+$commit_sha14 14th
+x notes on 14th commit
+
+$commit_sha13 13th
+x notes on 13th commit
+
+$commit_sha12 12th
+x notes on 12th commit
+
+$commit_sha11 11th
+x notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+x notes on 9th commit
+
+$commit_sha8 8th
+x notes on 8th commit
+
+$commit_sha7 7th
+x notes on 7th commit
+
+$commit_sha6 6th
+x notes on 6th commit
+
+$commit_sha5 5th
+
+$commit_sha4 4th
+
+$commit_sha3 3rd
+
+$commit_sha2 2nd
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'verify state of merge base (x)' 'verify_notes x x'
+
+test_expect_success 'setup local branch (y)' '
+	git update-ref refs/notes/y refs/notes/x &&
+	git config core.notesRef refs/notes/y &&
+	git notes add -f -m "y notes on 3rd commit" 3rd &&
+	git notes add -f -m "y notes on 4th commit" 4th &&
+	git notes add -f -m "y notes on 5th commit" 5th &&
+	git notes remove 6th &&
+	git notes remove 7th &&
+	git notes remove 8th &&
+	git notes add -f -m "y notes on 12th commit" 12th &&
+	git notes add -f -m "y notes on 13th commit" 13th &&
+	git notes add -f -m "y notes on 14th commit" 14th &&
+	git notes add -f -m "y notes on 15th commit" 15th
+'
+
+cat <<EOF | sort >expect_notes_y
+$(test_oid hash15b) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash12b) $commit_sha12
+$(test_oid hash11a) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash09a) $commit_sha9
+$(test_oid hash05b) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+EOF
+
+cat >expect_log_y <<EOF
+$commit_sha15 15th
+y notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+y notes on 12th commit
+
+$commit_sha11 11th
+x notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+x notes on 9th commit
+
+$commit_sha8 8th
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+y notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'verify state of local branch (y)' 'verify_notes y y'
+
+test_expect_success 'setup remote branch (z)' '
+	git update-ref refs/notes/z refs/notes/x &&
+	git config core.notesRef refs/notes/z &&
+	git notes add -f -m "z notes on 2nd commit" 2nd &&
+	git notes add -f -m "y notes on 4th commit" 4th &&
+	git notes add -f -m "z notes on 5th commit" 5th &&
+	git notes remove 6th &&
+	git notes add -f -m "z notes on 8th commit" 8th &&
+	git notes remove 9th &&
+	git notes add -f -m "z notes on 11th commit" 11th &&
+	git notes remove 12th &&
+	git notes add -f -m "y notes on 14th commit" 14th &&
+	git notes add -f -m "z notes on 15th commit" 15th
+'
+
+cat <<EOF | sort >expect_notes_z
+$(test_oid hash15c) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13a) $commit_sha13
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash08c) $commit_sha8
+$(test_oid hash07a) $commit_sha7
+$(test_oid hash05c) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_z <<EOF
+$commit_sha15 15th
+z notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+x notes on 13th commit
+
+$commit_sha12 12th
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+z notes on 8th commit
+
+$commit_sha7 7th
+x notes on 7th commit
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+z notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'verify state of remote branch (z)' 'verify_notes z z'
+
+# At this point, before merging z into y, we have the following status:
+#
+# commit | base/x  | local/y | remote/z | diff from x to y/z         | result
+# -------|---------|---------|----------|----------------------------|-------
+# 1st    | [none]  | [none]  | [none]   | unchanged / unchanged      | [none]
+# 2nd    | [none]  | [none]  | 283b482  | unchanged / added          | 283b482
+# 3rd    | [none]  | 5772f42 | [none]   | added     / unchanged      | 5772f42
+# 4th    | [none]  | e2bfd06 | e2bfd06  | added     / added (same)   | e2bfd06
+# 5th    | [none]  | 154508c | 99fc34a  | added     / added (diff)   | ???
+# 6th    | 11d97fd | [none]  | [none]   | removed   / removed        | [none]
+# 7th    | 8970033 | [none]  | 8970033  | removed   / unchanged      | [none]
+# 8th    | a3daf8a | [none]  | 851e163  | removed   / changed        | ???
+# 9th    | 20c613c | 20c613c | [none]   | unchanged / removed        | [none]
+# 10th   | b8d03e1 | b8d03e1 | b8d03e1  | unchanged / unchanged      | b8d03e1
+# 11th   | 7abbc45 | 7abbc45 | 7e3c535  | unchanged / changed        | 7e3c535
+# 12th   | dd161bc | a66055f | [none]   | changed   / removed        | ???
+# 13th   | 5d30216 | 3a631fd | 5d30216  | changed   / unchanged      | 3a631fd
+# 14th   | b0c95b9 | 5de7ea7 | 5de7ea7  | changed   / changed (same) | 5de7ea7
+# 15th   | 457a85d | 68b8630 | 9b4b2c6  | changed   / changed (diff) | ???
+
+test_expect_success 'merge z into y with invalid strategy => Fail/No changes' '
+	git config core.notesRef refs/notes/y &&
+	test_must_fail git notes merge --strategy=foo z &&
+	# Verify no changes (y)
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with invalid configuration option => Fail/No changes' '
+	git config core.notesRef refs/notes/y &&
+	cat >expect <<-\EOF &&
+	error: unknown notes merge strategy foo
+	fatal: unable to parse '\''notes.mergeStrategy'\'' from command-line config
+	EOF
+	test_must_fail git -c notes.mergeStrategy="foo" notes merge z 2>actual &&
+	test_cmp expect actual &&
+	# Verify no changes (y)
+	verify_notes y y
+'
+
+cat <<EOF | sort >expect_notes_ours
+$(test_oid hash15b) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash12b) $commit_sha12
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash05b) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_ours <<EOF
+$commit_sha15 15th
+y notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+y notes on 12th commit
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+y notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'merge z into y with "ours" strategy => Non-conflicting 3-way merge' '
+	git notes merge --strategy=ours z &&
+	verify_notes y ours
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "ours" configuration option => Non-conflicting 3-way merge' '
+	git -c notes.mergeStrategy="ours" notes merge z &&
+	verify_notes y ours
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "ours" per-ref configuration option => Non-conflicting 3-way merge' '
+	git -c notes.y.mergeStrategy="ours" notes merge z &&
+	verify_notes y ours
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+cat <<EOF | sort >expect_notes_theirs
+$(test_oid hash15c) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash08c) $commit_sha8
+$(test_oid hash05c) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_theirs <<EOF
+$commit_sha15 15th
+z notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+z notes on 8th commit
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+z notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'merge z into y with "theirs" strategy => Non-conflicting 3-way merge' '
+	git notes merge --strategy=theirs z &&
+	verify_notes y theirs
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "theirs" strategy overriding configuration option "ours" => Non-conflicting 3-way merge' '
+	git -c notes.mergeStrategy="ours" notes merge --strategy=theirs z &&
+	verify_notes y theirs
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+cat <<EOF | sort >expect_notes_union
+$(test_oid hash15d) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash12b) $commit_sha12
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash08c) $commit_sha8
+$(test_oid hash05d) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_union <<EOF
+$commit_sha15 15th
+y notes on 15th commit
+
+z notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+y notes on 12th commit
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+z notes on 8th commit
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+y notes on 5th commit
+
+z notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'merge z into y with "union" strategy => Non-conflicting 3-way merge' '
+	git notes merge --strategy=union z &&
+	verify_notes y union
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "union" strategy overriding per-ref configuration => Non-conflicting 3-way merge' '
+	git -c notes.y.mergeStrategy="theirs" notes merge --strategy=union z &&
+	verify_notes y union
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "union" per-ref overriding general configuration => Non-conflicting 3-way merge' '
+	git -c notes.y.mergeStrategy="union" -c notes.mergeStrategy="theirs" notes merge z &&
+	verify_notes y union
+'
+
+test_expect_success 'reset to pre-merge state (y)' '
+	git update-ref refs/notes/y refs/notes/y^1 &&
+	# Verify pre-merge state
+	verify_notes y y
+'
+
+test_expect_success 'merge z into y with "manual" per-ref only checks specific ref configuration => Conflicting 3-way merge' '
+	test_must_fail git -c notes.z.mergeStrategy="union" notes merge z &&
+	git notes merge --abort &&
+	verify_notes y y
+'
+
+cat <<EOF | sort >expect_notes_union2
+$(test_oid hash15e) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash12b) $commit_sha12
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash08c) $commit_sha8
+$(test_oid hash05e) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_union2 <<EOF
+$commit_sha15 15th
+z notes on 15th commit
+
+y notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+y notes on 12th commit
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+z notes on 8th commit
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+z notes on 5th commit
+
+y notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'merge y into z with "union" strategy => Non-conflicting 3-way merge' '
+	git config core.notesRef refs/notes/z &&
+	git notes merge --strategy=union y &&
+	verify_notes z union2
+'
+
+test_expect_success 'reset to pre-merge state (z)' '
+	git update-ref refs/notes/z refs/notes/z^1 &&
+	# Verify pre-merge state
+	verify_notes z z
+'
+
+cat <<EOF | sort >expect_notes_cat_sort_uniq
+$(test_oid hash15f) $commit_sha15
+$(test_oid hash14b) $commit_sha14
+$(test_oid hash13b) $commit_sha13
+$(test_oid hash12b) $commit_sha12
+$(test_oid hash11c) $commit_sha11
+$(test_oid hash10a) $commit_sha10
+$(test_oid hash08c) $commit_sha8
+$(test_oid hash05f) $commit_sha5
+$(test_oid hash04b) $commit_sha4
+$(test_oid hash03b) $commit_sha3
+$(test_oid hash02c) $commit_sha2
+EOF
+
+cat >expect_log_cat_sort_uniq <<EOF
+$commit_sha15 15th
+y notes on 15th commit
+z notes on 15th commit
+
+$commit_sha14 14th
+y notes on 14th commit
+
+$commit_sha13 13th
+y notes on 13th commit
+
+$commit_sha12 12th
+y notes on 12th commit
+
+$commit_sha11 11th
+z notes on 11th commit
+
+$commit_sha10 10th
+x notes on 10th commit
+
+$commit_sha9 9th
+
+$commit_sha8 8th
+z notes on 8th commit
+
+$commit_sha7 7th
+
+$commit_sha6 6th
+
+$commit_sha5 5th
+y notes on 5th commit
+z notes on 5th commit
+
+$commit_sha4 4th
+y notes on 4th commit
+
+$commit_sha3 3rd
+y notes on 3rd commit
+
+$commit_sha2 2nd
+z notes on 2nd commit
+
+$commit_sha1 1st
+
+EOF
+
+test_expect_success 'merge y into z with "cat_sort_uniq" strategy => Non-conflicting 3-way merge' '
+	git notes merge --strategy=cat_sort_uniq y &&
+	verify_notes z cat_sort_uniq
+'
+
+test_expect_success 'reset to pre-merge state (z)' '
+	git update-ref refs/notes/z refs/notes/z^1 &&
+	# Verify pre-merge state
+	verify_notes z z
+'
+
+test_expect_success 'merge y into z with "cat_sort_uniq" strategy configuration option => Non-conflicting 3-way merge' '
+	git -c notes.mergeStrategy="cat_sort_uniq" notes merge y &&
+	verify_notes z cat_sort_uniq
+'
+
+test_done