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git/t/t6020-merge-df.sh
Elijah Newren 65bf820d0e t6020: new test with interleaved lexicographic ordering of directories
If a repository has two files:
    foo/bar/baz
    foo/bar-2/baz
then a simple lexicographic ordering of files and directories shows
    ...
    foo/bar
    foo/bar-2
    foo/bar/baz
    ...
and the appearance of foo/bar-2 between foo/bar and foo/bar/baz can trip
up some codepaths.  Add a test to catch such cases.

t6020 might be a slight misfit since this testcase does not test any
kind of file/directory conflict.  However, it is similar in spirit to
some tests (4-6) already in t6020 that check cases where a *file* sorted
between a directory and the files underneath that directory.  This
testcase differs in that now there is a *directory* that sorts in the
middle.

Although merge-recursive currently has no problems with this simple
testcase, I discovered that it's very possible to accidentally mess it
up.  Further, we have no other merge or cherry-pick or rebase testcases
in the entire testsuite that cover such a case, so I felt like it would
be a worthwhile addition to the testsuite.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-27 11:01:48 -08:00

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#!/bin/sh
#
# Copyright (c) 2005 Fredrik Kuivinen
#
test_description='Test merge with directory/file conflicts'
. ./test-lib.sh
test_expect_success 'prepare repository' '
echo Hello >init &&
git add init &&
git commit -m initial &&
git branch B &&
mkdir dir &&
echo foo >dir/foo &&
git add dir/foo &&
git commit -m "File: dir/foo" &&
git checkout B &&
echo file dir >dir &&
git add dir &&
git commit -m "File: dir"
'
test_expect_success 'Merge with d/f conflicts' '
test_expect_code 1 git merge -m "merge msg" master
'
test_expect_success 'F/D conflict' '
git reset --hard &&
git checkout master &&
rm .git/index &&
mkdir before &&
echo FILE >before/one &&
echo FILE >after &&
git add . &&
git commit -m first &&
rm -f after &&
git mv before after &&
git commit -m move &&
git checkout -b para HEAD^ &&
echo COMPLETELY ANOTHER FILE >another &&
git add . &&
git commit -m para &&
git merge master
'
test_expect_success 'setup modify/delete + directory/file conflict' '
git checkout --orphan modify &&
git rm -rf . &&
git clean -fdqx &&
printf "a\nb\nc\nd\ne\nf\ng\nh\n" >letters &&
git add letters &&
git commit -m initial &&
# Throw in letters.txt for sorting order fun
# ("letters.txt" sorts between "letters" and "letters/file")
echo i >>letters &&
echo "version 2" >letters.txt &&
git add letters letters.txt &&
git commit -m modified &&
git checkout -b delete HEAD^ &&
git rm letters &&
mkdir letters &&
>letters/file &&
echo "version 1" >letters.txt &&
git add letters letters.txt &&
git commit -m deleted
'
test_expect_success 'modify/delete + directory/file conflict' '
git checkout delete^0 &&
test_must_fail git merge modify &&
test 5 -eq $(git ls-files -s | wc -l) &&
test 4 -eq $(git ls-files -u | wc -l) &&
test 1 -eq $(git ls-files -o | wc -l) &&
test_path_is_file letters/file &&
test_path_is_file letters.txt &&
test_path_is_file letters~modify
'
test_expect_success 'modify/delete + directory/file conflict; other way' '
git reset --hard &&
git clean -f &&
git checkout modify^0 &&
test_must_fail git merge delete &&
test 5 -eq $(git ls-files -s | wc -l) &&
test 4 -eq $(git ls-files -u | wc -l) &&
test 1 -eq $(git ls-files -o | wc -l) &&
test_path_is_file letters/file &&
test_path_is_file letters.txt &&
test_path_is_file letters~HEAD
'
test_expect_success 'Simple merge in repo with interesting pathnames' '
# Simple lexicographic ordering of files and directories would be:
# foo
# foo/bar
# foo/bar-2
# foo/bar/baz
# foo/bar-2/baz
# The fact that foo/bar-2 appears between foo/bar and foo/bar/baz
# can trip up some codepaths, and is the point of this test.
test_create_repo name-ordering &&
(
cd name-ordering &&
mkdir -p foo/bar &&
mkdir -p foo/bar-2 &&
>foo/bar/baz &&
>foo/bar-2/baz &&
git add . &&
git commit -m initial &&
git branch main &&
git branch other &&
git checkout other &&
echo other >foo/bar-2/baz &&
git add -u &&
git commit -m other &&
git checkout main &&
echo main >foo/bar/baz &&
git add -u &&
git commit -m main &&
git merge other &&
git ls-files -s >out &&
test_line_count = 2 out &&
git rev-parse :0:foo/bar/baz :0:foo/bar-2/baz >actual &&
git rev-parse HEAD~1:foo/bar/baz other:foo/bar-2/baz >expect &&
test_cmp expect actual
)
'
test_done