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authorVincent Ambo <Vincent Ambo>2020-01-11T23·36+0000
committerVincent Ambo <Vincent Ambo>2020-01-11T23·40+0000
commit7ef0d62730840ded097b524104cc0a0904591a63 (patch)
treea670f96103667aeca4789a95d94ca0dff550c4ce /third_party/git/t/t4065-diff-anchored.sh
parent6a2a3007077818e24a3d56fc492ada9206a10cf0 (diff)
parent1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5 (diff)
merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373
Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'
Diffstat (limited to 'third_party/git/t/t4065-diff-anchored.sh')
-rwxr-xr-xthird_party/git/t/t4065-diff-anchored.sh94
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diff --git a/third_party/git/t/t4065-diff-anchored.sh b/third_party/git/t/t4065-diff-anchored.sh
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+#!/bin/sh
+
+test_description='anchored diff algorithm'
+
+. ./test-lib.sh
+
+test_expect_success '--anchored' '
+	printf "a\nb\nc\n" >pre &&
+	printf "c\na\nb\n" >post &&
+
+	# normally, c is moved to produce the smallest diff
+	test_expect_code 1 git diff --no-index pre post >diff &&
+	grep "^+c" diff &&
+
+	# with anchor, a is moved
+	test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
+	grep "^+a" diff
+'
+
+test_expect_success '--anchored multiple' '
+	printf "a\nb\nc\nd\ne\nf\n" >pre &&
+	printf "c\na\nb\nf\nd\ne\n" >post &&
+
+	# with 1 anchor, c is not moved, but f is moved
+	test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
+	grep "^+a" diff && # a is moved instead of c
+	grep "^+f" diff &&
+
+	# with 2 anchors, c and f are not moved
+	test_expect_code 1 git diff --no-index --anchored=c --anchored=f pre post >diff &&
+	grep "^+a" diff &&
+	grep "^+d" diff # d is moved instead of f
+'
+
+test_expect_success '--anchored with nonexistent line has no effect' '
+	printf "a\nb\nc\n" >pre &&
+	printf "c\na\nb\n" >post &&
+
+	test_expect_code 1 git diff --no-index --anchored=x pre post >diff &&
+	grep "^+c" diff
+'
+
+test_expect_success '--anchored with non-unique line has no effect' '
+	printf "a\nb\nc\nd\ne\nc\n" >pre &&
+	printf "c\na\nb\nc\nd\ne\n" >post &&
+
+	test_expect_code 1 git diff --no-index --anchored=c pre post >diff &&
+	grep "^+c" diff
+'
+
+test_expect_success 'diff still produced with impossible multiple --anchored' '
+	printf "a\nb\nc\n" >pre &&
+	printf "c\na\nb\n" >post &&
+
+	test_expect_code 1 git diff --no-index --anchored=a --anchored=c pre post >diff &&
+	mv post expected_post &&
+
+	# Ensure that the diff is correct by applying it and then
+	# comparing the result with the original
+	git apply diff &&
+	diff expected_post post
+'
+
+test_expect_success 'later algorithm arguments override earlier ones' '
+	printf "a\nb\nc\n" >pre &&
+	printf "c\na\nb\n" >post &&
+
+	test_expect_code 1 git diff --no-index --patience --anchored=c pre post >diff &&
+	grep "^+a" diff &&
+
+	test_expect_code 1 git diff --no-index --anchored=c --patience pre post >diff &&
+	grep "^+c" diff &&
+
+	test_expect_code 1 git diff --no-index --histogram --anchored=c pre post >diff &&
+	grep "^+a" diff &&
+
+	test_expect_code 1 git diff --no-index --anchored=c --histogram pre post >diff &&
+	grep "^+c" diff
+'
+
+test_expect_success '--anchored works with other commands like "git show"' '
+	printf "a\nb\nc\n" >file &&
+	git add file &&
+	git commit -m foo &&
+	printf "c\na\nb\n" >file &&
+	git add file &&
+	git commit -m foo &&
+
+	# with anchor, a is moved
+	git show --patience --anchored=c >diff &&
+	grep "^+a" diff
+'
+
+test_done