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git/t/t6101-rev-parse-parents.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) 2005 Johannes Schindelin
#
test_description='Test git rev-parse with different parent options'
. ./test-lib.sh
. ../t6000lib.sh # t6xxx specific functions
date >path0
git update-index --add path0
save_tag tree git write-tree
hide_error save_tag start unique_commit "start" tree
save_tag second unique_commit "second" tree -p start
hide_error save_tag start2 unique_commit "start2" tree
save_tag two_parents unique_commit "next" tree -p second -p start2
save_tag final unique_commit "final" tree -p two_parents
test_expect_success 'start is valid' 'git rev-parse start | grep "^[0-9a-f]\{40\}$"'
test_expect_success 'start^0' "test $(cat .git/refs/tags/start) = $(git rev-parse start^0)"
test_expect_success 'start^1 not valid' "if git rev-parse --verify start^1; then false; else :; fi"
test_expect_success 'second^1 = second^' "test $(git rev-parse second^1) = $(git rev-parse second^)"
test_expect_success 'final^1^1^1' "test $(git rev-parse start) = $(git rev-parse final^1^1^1)"
test_expect_success 'final^1^1^1 = final^^^' "test $(git rev-parse final^1^1^1) = $(git rev-parse final^^^)"
test_expect_success 'final^1^2' "test $(git rev-parse start2) = $(git rev-parse final^1^2)"
test_expect_success 'final^1^2 != final^1^1' "test $(git rev-parse final^1^2) != $(git rev-parse final^1^1)"
test_expect_success 'final^1^3 not valid' "if git rev-parse --verify final^1^3; then false; else :; fi"
test_expect_success '--verify start2^1' '! git rev-parse --verify start2^1'
test_expect_success '--verify start2^0' 'git rev-parse --verify start2^0'
test_expect_success 'repack for next test' 'git repack -a -d'
test_expect_success 'short SHA-1 works' '
start=`git rev-parse --verify start` &&
echo $start &&
abbrv=`echo $start | sed s/.\$//` &&
echo $abbrv &&
abbrv=`git rev-parse --verify $abbrv` &&
echo $abbrv &&
test $start = $abbrv'
test_done