git/t/t2018-checkout-branch.sh
Ben Peart 8424bfd45b checkout: fix regression in checkout -b on intitial checkout
When doing a 'checkout -b' do a full checkout including updating the working
tree when doing the initial checkout. As the new test involves an filesystem
access, do it later in the sequence to give chance to other cheaper tests to
leave early. This fixes the regression in behavior caused by fa655d8411
(checkout: optimize "git checkout -b <new_branch>", 2018-08-16).

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-23 13:22:48 -08:00

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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_expect_success 'checkout -b after clone --no-checkout does a checkout of HEAD' '
git init src &&
test_commit -C src a &&
rev="$(git -C src rev-parse HEAD)" &&
git clone --no-checkout src dest &&
git -C dest checkout "$rev" -b branch &&
test_path_is_file dest/a.t
'
test_done