git/t/t2012-checkout-last.sh
Eric Sunshine db5875aa9f t0000-t3999: detect and signal failure within loop
Failures within `for` and `while` loops can go unnoticed if not detected
and signaled manually since the loop itself does not abort when a
contained command fails, nor will a failure necessarily be detected when
the loop finishes since the loop returns the exit code of the last
command it ran on the final iteration, which may not be the command
which failed. Therefore, detect and signal failures manually within
loops using the idiom `|| return 1` (or `|| exit 1` within subshells).

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-13 10:29:48 -08:00

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#!/bin/sh
test_description='checkout can switch to last branch and merge base'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_expect_success 'setup' '
test_commit initial world hello &&
git branch other &&
test_commit --append second world "hello again"
'
test_expect_success '"checkout -" does not work initially' '
test_must_fail git checkout -
'
test_expect_success 'first branch switch' '
git checkout other
'
test_expect_success '"checkout -" switches back' '
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/main"
'
test_expect_success '"checkout -" switches forth' '
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/other"
'
test_expect_success 'detach HEAD' '
git checkout $(git rev-parse HEAD)
'
test_expect_success '"checkout -" attaches again' '
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/other"
'
test_expect_success '"checkout -" detaches again' '
git checkout - &&
test "z$(git rev-parse HEAD)" = "z$(git rev-parse other)" &&
test_must_fail git symbolic-ref HEAD
'
test_expect_success 'more switches' '
for i in 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
do
git checkout -b branch$i || return 1
done
'
more_switches () {
for i in 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
do
git checkout branch$i || return 1
done
}
test_expect_success 'switch to the last' '
more_switches &&
git checkout @{-1} &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch2"
'
test_expect_success 'switch to second from the last' '
more_switches &&
git checkout @{-2} &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch3"
'
test_expect_success 'switch to third from the last' '
more_switches &&
git checkout @{-3} &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch4"
'
test_expect_success 'switch to fourth from the last' '
more_switches &&
git checkout @{-4} &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch5"
'
test_expect_success 'switch to twelfth from the last' '
more_switches &&
git checkout @{-12} &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/branch13"
'
test_expect_success 'merge base test setup' '
git checkout -b another other &&
test_commit --append third world "hello again"
'
test_expect_success 'another...main' '
git checkout another &&
git checkout another...main &&
test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify main^)"
'
test_expect_success '...main' '
git checkout another &&
git checkout ...main &&
test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify main^)"
'
test_expect_success 'main...' '
git checkout another &&
git checkout main... &&
test "z$(git rev-parse --verify HEAD)" = "z$(git rev-parse --verify main^)"
'
test_expect_success '"checkout -" works after a rebase A' '
git checkout main &&
git checkout other &&
git rebase main &&
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/main"
'
test_expect_success '"checkout -" works after a rebase A B' '
git branch moodle main~1 &&
git checkout main &&
git checkout other &&
git rebase main moodle &&
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/main"
'
test_expect_success '"checkout -" works after a rebase -i A' '
git checkout main &&
git checkout other &&
git rebase -i main &&
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/main"
'
test_expect_success '"checkout -" works after a rebase -i A B' '
git branch foodle main~1 &&
git checkout main &&
git checkout other &&
git rebase main foodle &&
git checkout - &&
test "z$(git symbolic-ref HEAD)" = "zrefs/heads/main"
'
test_done