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#!/bin/sh
test_description='checkout '
. ./test-lib.sh
# Arguments: <branch> <sha> [<checkout options>]
#
# Runs "git checkout" to switch to <branch>, testing that
#
# 1) we are on the specified branch, <branch>;
# 2) HEAD is <sha>; if <sha> is not specified, the old HEAD is used.
#
# If <checkout options> is not specified, "git checkout" is run with -b.
do_checkout() {
exp_branch=$1 &&
exp_ref="refs/heads/$exp_branch" &&
# if <sha> is not specified, use HEAD.
exp_sha=${2:-$(git rev-parse --verify HEAD)} &&
# default options for git checkout: -b
if [ -z "$3" ]; then
opts="-b"
else
opts="$3"
fi
git checkout $opts $exp_branch $exp_sha &&
test $exp_ref = $(git rev-parse --symbolic-full-name HEAD) &&
test $exp_sha = $(git rev-parse --verify HEAD)
}
test_dirty_unmergeable() {
! git diff --exit-code >/dev/null
}
setup_dirty_unmergeable() {
echo >>file1 change2
}
test_dirty_mergeable() {
! git diff --cached --exit-code >/dev/null
}
setup_dirty_mergeable() {
echo >file2 file2 &&
git add file2
}
test_expect_success 'setup' '
test_commit initial file1 &&
HEAD1=$(git rev-parse --verify HEAD) &&
test_commit change1 file1 &&
HEAD2=$(git rev-parse --verify HEAD) &&
git branch -m branch1
'
test_expect_success 'checkout -b to a new branch, set to HEAD' '
do_checkout branch2
'
test_expect_success 'checkout -b to a new branch, set to an explicit ref' '
git checkout branch1 &&
git branch -D branch2 &&
do_checkout branch2 $HEAD1
'
test_expect_success 'checkout -b to a new branch with unmergeable changes fails' '
git checkout branch1 &&
# clean up from previous test
git branch -D branch2 &&
setup_dirty_unmergeable &&
test_must_fail do_checkout branch2 $HEAD1 &&
test_dirty_unmergeable
'
test_expect_success 'checkout -f -b to a new branch with unmergeable changes discards changes' '
# still dirty and on branch1
do_checkout branch2 $HEAD1 "-f -b" &&
test_must_fail test_dirty_unmergeable
'
test_expect_success 'checkout -b to a new branch preserves mergeable changes' '
git checkout branch1 &&
# clean up from previous test
git branch -D branch2 &&
setup_dirty_mergeable &&
do_checkout branch2 $HEAD1 &&
test_dirty_mergeable
'
test_expect_success 'checkout -f -b to a new branch with mergeable changes discards changes' '
# clean up from previous test
git reset --hard &&
git checkout branch1 &&
# clean up from previous test
git branch -D branch2 &&
setup_dirty_mergeable &&
do_checkout branch2 $HEAD1 "-f -b" &&
test_must_fail test_dirty_mergeable
'
test_expect_success 'checkout -b to an existing branch fails' '
git reset --hard HEAD &&
test_must_fail do_checkout branch2 $HEAD2
'
test_expect_success 'checkout -b to @{-1} fails with the right branch name' '
git reset --hard HEAD &&
git checkout branch1 &&
git checkout branch2 &&
echo >expect "fatal: A branch named '\''branch1'\'' already exists." &&
test_must_fail git checkout -b @{-1} 2>actual &&
test_i18ncmp expect actual
'
test_expect_success 'checkout -B to an existing branch resets branch to HEAD' '
git checkout branch1 &&
do_checkout branch2 "" -B
'
test_expect_success 'checkout -B to an existing branch from detached HEAD resets branch to HEAD' '
git checkout $(git rev-parse --verify HEAD) &&
do_checkout branch2 "" -B
'
test_expect_success 'checkout -B to an existing branch with an explicit ref resets branch to that ref' '
git checkout branch1 &&
do_checkout branch2 $HEAD1 -B
'
test_expect_success 'checkout -B to an existing branch with unmergeable changes fails' '
git checkout branch1 &&
setup_dirty_unmergeable &&
test_must_fail do_checkout branch2 $HEAD1 -B &&
test_dirty_unmergeable
'
test_expect_success 'checkout -f -B to an existing branch with unmergeable changes discards changes' '
# still dirty and on branch1
do_checkout branch2 $HEAD1 "-f -B" &&
test_must_fail test_dirty_unmergeable
'
test_expect_success 'checkout -B to an existing branch preserves mergeable changes' '
git checkout branch1 &&
setup_dirty_mergeable &&
do_checkout branch2 $HEAD1 -B &&
test_dirty_mergeable
'
test_expect_success 'checkout -f -B to an existing branch with mergeable changes discards changes' '
# clean up from previous test
git reset --hard &&
git checkout branch1 &&
setup_dirty_mergeable &&
do_checkout branch2 $HEAD1 "-f -B" &&
test_must_fail test_dirty_mergeable
'
test_expect_success 'checkout -b <describe>' '
git tag -f -m "First commit" initial initial &&
git checkout -f change1 &&
name=$(git describe) &&
git checkout -b $name &&
git diff --exit-code change1 &&
echo "refs/heads/$name" >expect &&
git symbolic-ref HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'checkout -B to the current branch works' '
git checkout branch1 &&
git checkout -B branch1-scratch &&
setup_dirty_mergeable &&
git checkout -B branch1-scratch initial &&
test_dirty_mergeable
'
test_done