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git/t/t5710-info-alternate.sh
Junio C Hamano 41ac414ea2 Sane use of test_expect_failure
Originally, test_expect_failure was designed to be the opposite
of test_expect_success, but this was a bad decision.  Most tests
run a series of commands that leads to the single command that
needs to be tested, like this:

    test_expect_{success,failure} 'test title' '
	setup1 &&
        setup2 &&
        setup3 &&
        what is to be tested
    '

And expecting a failure exit from the whole sequence misses the
point of writing tests.  Your setup$N that are supposed to
succeed may have failed without even reaching what you are
trying to test.  The only valid use of test_expect_failure is to
check a trivial single command that is expected to fail, which
is a minority in tests of Porcelain-ish commands.

This large-ish patch rewrites all uses of test_expect_failure to
use test_expect_success and rewrites the condition of what is
tested, like this:

    test_expect_success 'test title' '
	setup1 &&
        setup2 &&
        setup3 &&
        ! this command should fail
    '

test_expect_failure is redefined to serve as a reminder that
that test *should* succeed but due to a known breakage in git it
currently does not pass.  So if git-foo command should create a
file 'bar' but you discovered a bug that it doesn't, you can
write a test like this:

    test_expect_failure 'git-foo should create bar' '
        rm -f bar &&
        git foo &&
        test -f bar
    '

This construct acts similar to test_expect_success, but instead
of reporting "ok/FAIL" like test_expect_success does, the
outcome is reported as "FIXED/still broken".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-01 20:49:34 -08:00

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#!/bin/sh
#
# Copyright (C) 2006 Martin Waitz <tali@admingilde.org>
#
test_description='test transitive info/alternate entries'
. ./test-lib.sh
# test that a file is not reachable in the current repository
# but that it is after creating a info/alternate entry
reachable_via() {
alternate="$1"
file="$2"
if git cat-file -e "HEAD:$file"; then return 1; fi
echo "$alternate" >> .git/objects/info/alternate
git cat-file -e "HEAD:$file"
}
test_valid_repo() {
git fsck --full > fsck.log &&
test `wc -l < fsck.log` = 0
}
base_dir=`pwd`
test_expect_success 'preparing first repository' \
'test_create_repo A && cd A &&
echo "Hello World" > file1 &&
git add file1 &&
git commit -m "Initial commit" file1 &&
git repack -a -d &&
git prune'
cd "$base_dir"
test_expect_success 'preparing second repository' \
'git clone -l -s A B && cd B &&
echo "foo bar" > file2 &&
git add file2 &&
git commit -m "next commit" file2 &&
git repack -a -d -l &&
git prune'
cd "$base_dir"
test_expect_success 'preparing third repository' \
'git clone -l -s B C && cd C &&
echo "Goodbye, cruel world" > file3 &&
git add file3 &&
git commit -m "one more" file3 &&
git repack -a -d -l &&
git prune'
cd "$base_dir"
test_expect_success 'creating too deep nesting' \
'git clone -l -s C D &&
git clone -l -s D E &&
git clone -l -s E F &&
git clone -l -s F G &&
git clone -l -s G H'
test_expect_success 'invalidity of deepest repository' \
'cd H && {
test_valid_repo
test $? -ne 0
}'
cd "$base_dir"
test_expect_success 'validity of third repository' \
'cd C &&
test_valid_repo'
cd "$base_dir"
test_expect_success 'validity of fourth repository' \
'cd D &&
test_valid_repo'
cd "$base_dir"
test_expect_success 'breaking of loops' \
"echo '$base_dir/B/.git/objects' >> '$base_dir'/A/.git/objects/info/alternates&&
cd C &&
test_valid_repo"
cd "$base_dir"
test_expect_success 'that info/alternates is necessary' \
'cd C &&
rm -f .git/objects/info/alternates &&
! (test_valid_repo)'
cd "$base_dir"
test_expect_success 'that relative alternate is possible for current dir' \
'cd C &&
echo "../../../B/.git/objects" > .git/objects/info/alternates &&
test_valid_repo'
cd "$base_dir"
test_expect_success \
'that relative alternate is only possible for current dir' '
cd D &&
! (test_valid_repo)
'
cd "$base_dir"
test_done