mirror of
https://github.com/git/git.git
synced 2024-11-01 14:57:52 +01:00
2477ab2ea8
Teach diff a new algorithm, one that attempts to prevent user-specified lines from appearing as a deletion or addition in the end result. The end user can use this by specifying "--anchored=<text>" one or more times when using Git commands like "diff" and "show". Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
94 lines
2.6 KiB
Bash
Executable file
94 lines
2.6 KiB
Bash
Executable file
#!/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
|