Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 408 insertions, 0 deletions

diff --git a/t/t6600-test-reach.sh b/t/t6600-test-reach.sh
new file mode 100755
index 000000000000..b24d85003606
--- /dev/null
+++ b/t/t6600-test-reach.sh
@@ -0,0 +1,408 @@
+#!/bin/sh
+
+test_description='basic commit reachability tests'
+
+. ./test-lib.sh
+
+# Construct a grid-like commit graph with points (x,y)
+# with 1 <= x <= 10, 1 <= y <= 10, where (x,y) has
+# parents (x-1, y) and (x, y-1), keeping in mind that
+# we drop a parent if a coordinate is nonpositive.
+#
+#             (10,10)
+#            /       \
+#         (10,9)    (9,10)
+#        /     \   /      \
+#    (10,8)    (9,9)      (8,10)
+#   /     \    /   \      /    \
+#         ( continued...)
+#   \     /    \   /      \    /
+#    (3,1)     (2,2)      (1,3)
+#        \     /    \     /
+#         (2,1)      (2,1)
+#              \    /
+#              (1,1)
+#
+# We use branch 'commit-x-y' to refer to (x,y).
+# This grid allows interesting reachability and
+# non-reachability queries: (x,y) can reach (x',y')
+# if and only if x' <= x and y' <= y.
+test_expect_success 'setup' '
+	for i in $(test_seq 1 10)
+	do
+		test_commit "1-$i" &&
+		git branch -f commit-1-$i &&
+		git tag -a -m "1-$i" tag-1-$i commit-1-$i
+	done &&
+	for j in $(test_seq 1 9)
+	do
+		git reset --hard commit-$j-1 &&
+		x=$(($j + 1)) &&
+		test_commit "$x-1" &&
+		git branch -f commit-$x-1 &&
+		git tag -a -m "$x-1" tag-$x-1 commit-$x-1 &&
+
+		for i in $(test_seq 2 10)
+		do
+			git merge commit-$j-$i -m "$x-$i" &&
+			git branch -f commit-$x-$i &&
+			git tag -a -m "$x-$i" tag-$x-$i commit-$x-$i
+		done
+	done &&
+	git commit-graph write --reachable &&
+	mv .git/objects/info/commit-graph commit-graph-full &&
+	git show-ref -s commit-5-5 | git commit-graph write --stdin-commits &&
+	mv .git/objects/info/commit-graph commit-graph-half &&
+	git config core.commitGraph true
+'
+
+run_three_modes () {
+	test_when_finished rm -rf .git/objects/info/commit-graph &&
+	"$@" <input >actual &&
+	test_cmp expect actual &&
+	cp commit-graph-full .git/objects/info/commit-graph &&
+	"$@" <input >actual &&
+	test_cmp expect actual &&
+	cp commit-graph-half .git/objects/info/commit-graph &&
+	"$@" <input >actual &&
+	test_cmp expect actual
+}
+
+test_three_modes () {
+	run_three_modes test-tool reach "$@"
+}
+
+test_expect_success 'ref_newer:miss' '
+	cat >input <<-\EOF &&
+	A:commit-5-7
+	B:commit-4-9
+	EOF
+	echo "ref_newer(A,B):0" >expect &&
+	test_three_modes ref_newer
+'
+
+test_expect_success 'ref_newer:hit' '
+	cat >input <<-\EOF &&
+	A:commit-5-7
+	B:commit-2-3
+	EOF
+	echo "ref_newer(A,B):1" >expect &&
+	test_three_modes ref_newer
+'
+
+test_expect_success 'in_merge_bases:hit' '
+	cat >input <<-\EOF &&
+	A:commit-5-7
+	B:commit-8-8
+	EOF
+	echo "in_merge_bases(A,B):1" >expect &&
+	test_three_modes in_merge_bases
+'
+
+test_expect_success 'in_merge_bases:miss' '
+	cat >input <<-\EOF &&
+	A:commit-6-8
+	B:commit-5-9
+	EOF
+	echo "in_merge_bases(A,B):0" >expect &&
+	test_three_modes in_merge_bases
+'
+
+test_expect_success 'is_descendant_of:hit' '
+	cat >input <<-\EOF &&
+	A:commit-5-7
+	X:commit-4-8
+	X:commit-6-6
+	X:commit-1-1
+	EOF
+	echo "is_descendant_of(A,X):1" >expect &&
+	test_three_modes is_descendant_of
+'
+
+test_expect_success 'is_descendant_of:miss' '
+	cat >input <<-\EOF &&
+	A:commit-6-8
+	X:commit-5-9
+	X:commit-4-10
+	X:commit-7-6
+	EOF
+	echo "is_descendant_of(A,X):0" >expect &&
+	test_three_modes is_descendant_of
+'
+
+test_expect_success 'get_merge_bases_many' '
+	cat >input <<-\EOF &&
+	A:commit-5-7
+	X:commit-4-8
+	X:commit-6-6
+	X:commit-8-3
+	EOF
+	{
+		echo "get_merge_bases_many(A,X):" &&
+		git rev-parse commit-5-6 \
+			      commit-4-7 | sort
+	} >expect &&
+	test_three_modes get_merge_bases_many
+'
+
+test_expect_success 'reduce_heads' '
+	cat >input <<-\EOF &&
+	X:commit-1-10
+	X:commit-2-8
+	X:commit-3-6
+	X:commit-4-4
+	X:commit-1-7
+	X:commit-2-5
+	X:commit-3-3
+	X:commit-5-1
+	EOF
+	{
+		echo "reduce_heads(X):" &&
+		git rev-parse commit-5-1 \
+			      commit-4-4 \
+			      commit-3-6 \
+			      commit-2-8 \
+			      commit-1-10 | sort
+	} >expect &&
+	test_three_modes reduce_heads
+'
+
+test_expect_success 'can_all_from_reach:hit' '
+	cat >input <<-\EOF &&
+	X:commit-2-10
+	X:commit-3-9
+	X:commit-4-8
+	X:commit-5-7
+	X:commit-6-6
+	X:commit-7-5
+	X:commit-8-4
+	X:commit-9-3
+	Y:commit-1-9
+	Y:commit-2-8
+	Y:commit-3-7
+	Y:commit-4-6
+	Y:commit-5-5
+	Y:commit-6-4
+	Y:commit-7-3
+	Y:commit-8-1
+	EOF
+	echo "can_all_from_reach(X,Y):1" >expect &&
+	test_three_modes can_all_from_reach
+'
+
+test_expect_success 'can_all_from_reach:miss' '
+	cat >input <<-\EOF &&
+	X:commit-2-10
+	X:commit-3-9
+	X:commit-4-8
+	X:commit-5-7
+	X:commit-6-6
+	X:commit-7-5
+	X:commit-8-4
+	X:commit-9-3
+	Y:commit-1-9
+	Y:commit-2-8
+	Y:commit-3-7
+	Y:commit-4-6
+	Y:commit-5-5
+	Y:commit-6-4
+	Y:commit-8-5
+	EOF
+	echo "can_all_from_reach(X,Y):0" >expect &&
+	test_three_modes can_all_from_reach
+'
+
+test_expect_success 'can_all_from_reach_with_flag: tags case' '
+	cat >input <<-\EOF &&
+	X:tag-2-10
+	X:tag-3-9
+	X:tag-4-8
+	X:commit-5-7
+	X:commit-6-6
+	X:commit-7-5
+	X:commit-8-4
+	X:commit-9-3
+	Y:tag-1-9
+	Y:tag-2-8
+	Y:tag-3-7
+	Y:commit-4-6
+	Y:commit-5-5
+	Y:commit-6-4
+	Y:commit-7-3
+	Y:commit-8-1
+	EOF
+	echo "can_all_from_reach_with_flag(X,_,_,0,0):1" >expect &&
+	test_three_modes can_all_from_reach_with_flag
+'
+
+test_expect_success 'commit_contains:hit' '
+	cat >input <<-\EOF &&
+	A:commit-7-7
+	X:commit-2-10
+	X:commit-3-9
+	X:commit-4-8
+	X:commit-5-7
+	X:commit-6-6
+	X:commit-7-5
+	X:commit-8-4
+	X:commit-9-3
+	EOF
+	echo "commit_contains(_,A,X,_):1" >expect &&
+	test_three_modes commit_contains &&
+	test_three_modes commit_contains --tag
+'
+
+test_expect_success 'commit_contains:miss' '
+	cat >input <<-\EOF &&
+	A:commit-6-5
+	X:commit-2-10
+	X:commit-3-9
+	X:commit-4-8
+	X:commit-5-7
+	X:commit-6-6
+	X:commit-7-5
+	X:commit-8-4
+	X:commit-9-3
+	EOF
+	echo "commit_contains(_,A,X,_):0" >expect &&
+	test_three_modes commit_contains &&
+	test_three_modes commit_contains --tag
+'
+
+test_expect_success 'rev-list: basic topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
+		commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
+		commit-6-3 commit-5-3 commit-4-3 commit-3-3 commit-2-3 commit-1-3 \
+		commit-6-2 commit-5-2 commit-4-2 commit-3-2 commit-2-2 commit-1-2 \
+		commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
+	>expect &&
+	run_three_modes git rev-list --topo-order commit-6-6
+'
+
+test_expect_success 'rev-list: first-parent topo-order' '
+	git rev-parse \
+		commit-6-6 \
+		commit-6-5 \
+		commit-6-4 \
+		commit-6-3 \
+		commit-6-2 \
+		commit-6-1 commit-5-1 commit-4-1 commit-3-1 commit-2-1 commit-1-1 \
+	>expect &&
+	run_three_modes git rev-list --first-parent --topo-order commit-6-6
+'
+
+test_expect_success 'rev-list: range topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 commit-2-6 commit-1-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 commit-2-5 commit-1-5 \
+		commit-6-4 commit-5-4 commit-4-4 commit-3-4 commit-2-4 commit-1-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		commit-6-2 commit-5-2 commit-4-2 \
+		commit-6-1 commit-5-1 commit-4-1 \
+	>expect &&
+	run_three_modes git rev-list --topo-order commit-3-3..commit-6-6
+'
+
+test_expect_success 'rev-list: range topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 \
+		commit-6-5 commit-5-5 commit-4-5 \
+		commit-6-4 commit-5-4 commit-4-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		commit-6-2 commit-5-2 commit-4-2 \
+		commit-6-1 commit-5-1 commit-4-1 \
+	>expect &&
+	run_three_modes git rev-list --topo-order commit-3-8..commit-6-6
+'
+
+test_expect_success 'rev-list: first-parent range topo-order' '
+	git rev-parse \
+		commit-6-6 \
+		commit-6-5 \
+		commit-6-4 \
+		commit-6-3 \
+		commit-6-2 \
+		commit-6-1 commit-5-1 commit-4-1 \
+	>expect &&
+	run_three_modes git rev-list --first-parent --topo-order commit-3-8..commit-6-6
+'
+
+test_expect_success 'rev-list: ancestry-path topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 commit-3-6 \
+		commit-6-5 commit-5-5 commit-4-5 commit-3-5 \
+		commit-6-4 commit-5-4 commit-4-4 commit-3-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+	>expect &&
+	run_three_modes git rev-list --topo-order --ancestry-path commit-3-3..commit-6-6
+'
+
+test_expect_success 'rev-list: symmetric difference topo-order' '
+	git rev-parse \
+		commit-6-6 commit-5-6 commit-4-6 \
+		commit-6-5 commit-5-5 commit-4-5 \
+		commit-6-4 commit-5-4 commit-4-4 \
+		commit-6-3 commit-5-3 commit-4-3 \
+		commit-6-2 commit-5-2 commit-4-2 \
+		commit-6-1 commit-5-1 commit-4-1 \
+		commit-3-8 commit-2-8 commit-1-8 \
+		commit-3-7 commit-2-7 commit-1-7 \
+	>expect &&
+	run_three_modes git rev-list --topo-order commit-3-8...commit-6-6
+'
+
+test_expect_success 'get_reachable_subset:all' '
+	cat >input <<-\EOF &&
+	X:commit-9-1
+	X:commit-8-3
+	X:commit-7-5
+	X:commit-6-6
+	X:commit-1-7
+	Y:commit-3-3
+	Y:commit-1-7
+	Y:commit-5-6
+	EOF
+	(
+		echo "get_reachable_subset(X,Y)" &&
+		git rev-parse commit-3-3 \
+			      commit-1-7 \
+			      commit-5-6 | sort
+	) >expect &&
+	test_three_modes get_reachable_subset
+'
+
+test_expect_success 'get_reachable_subset:some' '
+	cat >input <<-\EOF &&
+	X:commit-9-1
+	X:commit-8-3
+	X:commit-7-5
+	X:commit-1-7
+	Y:commit-3-3
+	Y:commit-1-7
+	Y:commit-5-6
+	EOF
+	(
+		echo "get_reachable_subset(X,Y)" &&
+		git rev-parse commit-3-3 \
+			      commit-1-7 | sort
+	) >expect &&
+	test_three_modes get_reachable_subset
+'
+
+test_expect_success 'get_reachable_subset:none' '
+	cat >input <<-\EOF &&
+	X:commit-9-1
+	X:commit-8-3
+	X:commit-7-5
+	X:commit-1-7
+	Y:commit-9-3
+	Y:commit-7-6
+	Y:commit-2-8
+	EOF
+	echo "get_reachable_subset(X,Y)" >expect &&
+	test_three_modes get_reachable_subset
+'
+
+test_done