1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-10-30 05:47:53 +01:00
git/t/t1000-read-tree-m-3way.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

531 lines
16 KiB
Bash
Executable file

#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='Three way merge with read-tree -m
This test tries three-way merge with read-tree -m
There is one ancestor (called O for Original) and two branches A
and B derived from it. We want to do a 3-way merge between A and
B, using O as the common ancestor.
merge A O B
Decisions are made by comparing contents of O, A and B pathname
by pathname. The result is determined by the following guiding
principle:
- If only A does something to it and B does not touch it, take
whatever A does.
- If only B does something to it and A does not touch it, take
whatever B does.
- If both A and B does something but in the same way, take
whatever they do.
- If A and B does something but different things, we need a
3-way merge:
- We cannot do anything about the following cases:
* O does not have it. A and B both must be adding to the
same path independently.
* A deletes it. B must be modifying.
- Otherwise, A and B are modifying. Run 3-way merge.
First, the case matrix.
- Vertical axis is for A'\''s actions.
- Horizontal axis is for B'\''s actions.
.----------------------------------------------------------------.
| A B | No Action | Delete | Modify | Add |
|------------+------------+------------+------------+------------|
| No Action | | | | |
| | select O | delete | select B | select B |
| | | | | |
|------------+------------+------------+------------+------------|
| Delete | | | ********** | can |
| | delete | delete | merge | not |
| | | | | happen |
|------------+------------+------------+------------+------------|
| Modify | | ********** | ?????????? | can |
| | select A | merge | select A=B | not |
| | | | merge | happen |
|------------+------------+------------+------------+------------|
| Add | | can | can | ?????????? |
| | select A | not | not | select A=B |
| | | happen | happen | merge |
.----------------------------------------------------------------.
In addition:
SS: a special case of MM, where A and B makes the same modification.
LL: a special case of AA, where A and B creates the same file.
TT: a special case of MM, where A and B makes mergeable changes.
DF: a special case, where A makes a directory and B makes a file.
'
. ./test-lib.sh
. ../lib-read-tree-m-3way.sh
################################################################
# Trivial "majority when 3 stages exist" merge plus #2ALT, #3ALT
# and #5ALT trivial merges.
cat >expected <<\EOF
100644 X 2 AA
100644 X 3 AA
100644 X 0 AN
100644 X 1 DD
100644 X 3 DF
100644 X 2 DF/DF
100644 X 1 DM
100644 X 3 DM
100644 X 1 DN
100644 X 3 DN
100644 X 0 LL
100644 X 1 MD
100644 X 2 MD
100644 X 1 MM
100644 X 2 MM
100644 X 3 MM
100644 X 0 MN
100644 X 0 NA
100644 X 1 ND
100644 X 2 ND
100644 X 0 NM
100644 X 0 NN
100644 X 0 SS
100644 X 1 TT
100644 X 2 TT
100644 X 3 TT
100644 X 2 Z/AA
100644 X 3 Z/AA
100644 X 0 Z/AN
100644 X 1 Z/DD
100644 X 1 Z/DM
100644 X 3 Z/DM
100644 X 1 Z/DN
100644 X 3 Z/DN
100644 X 1 Z/MD
100644 X 2 Z/MD
100644 X 1 Z/MM
100644 X 2 Z/MM
100644 X 3 Z/MM
100644 X 0 Z/MN
100644 X 0 Z/NA
100644 X 1 Z/ND
100644 X 2 Z/ND
100644 X 0 Z/NM
100644 X 0 Z/NN
EOF
_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
check_result () {
git ls-files --stage | sed -e 's/ '"$_x40"' / X /' >current &&
git diff expected current
}
# This is done on an empty work directory, which is the normal
# merge person behaviour.
test_expect_success \
'3-way merge with git read-tree -m, empty cache' \
"rm -fr [NDMALTS][NDMALTSF] Z &&
rm .git/index &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
# This starts out with the first head, which is the normal
# patch submitter behaviour.
test_expect_success \
'3-way merge with git read-tree -m, match H' \
"rm -fr [NDMALTS][NDMALTSF] Z &&
rm .git/index &&
git read-tree $tree_A &&
git checkout-index -f -u -a &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
: <<\END_OF_CASE_TABLE
We have so far tested only empty index and clean-and-matching-A index
case which are trivial. Make sure index requirements are also
checked.
"git read-tree -m O A B"
O A B result index requirements
-------------------------------------------------------------------
1 missing missing missing - must not exist.
------------------------------------------------------------------
2 missing missing exists take B* must match B, if exists.
------------------------------------------------------------------
3 missing exists missing take A* must match A, if exists.
------------------------------------------------------------------
4 missing exists A!=B no merge must match A and be
up-to-date, if exists.
------------------------------------------------------------------
5 missing exists A==B take A must match A, if exists.
------------------------------------------------------------------
6 exists missing missing remove must not exist.
------------------------------------------------------------------
7 exists missing O!=B no merge must not exist.
------------------------------------------------------------------
8 exists missing O==B remove must not exist.
------------------------------------------------------------------
9 exists O!=A missing no merge must match A and be
up-to-date, if exists.
------------------------------------------------------------------
10 exists O==A missing no merge must match A
------------------------------------------------------------------
11 exists O!=A O!=B no merge must match A and be
A!=B up-to-date, if exists.
------------------------------------------------------------------
12 exists O!=A O!=B take A must match A, if exists.
A==B
------------------------------------------------------------------
13 exists O!=A O==B take A must match A, if exists.
------------------------------------------------------------------
14 exists O==A O!=B take B if exists, must either (1)
match A and be up-to-date,
or (2) match B.
------------------------------------------------------------------
15 exists O==A O==B take B must match A if exists.
------------------------------------------------------------------
16 exists O==A O==B barf must match A if exists.
*multi* in one in another
-------------------------------------------------------------------
Note: we need to be careful in case 2 and 3. The tree A may contain
DF (file) when tree B require DF to be a directory by having DF/DF
(file).
END_OF_CASE_TABLE
test_expect_success '1 - must not have an entry not in A.' "
rm -f .git/index XX &&
echo XX >XX &&
git update-index --add XX &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'2 - must match B in !O && !A && B case.' \
"rm -f .git/index NA &&
cp .orig-B/NA NA &&
git update-index --add NA &&
git read-tree -m $tree_O $tree_A $tree_B"
test_expect_success \
'2 - matching B alone is OK in !O && !A && B case.' \
"rm -f .git/index NA &&
cp .orig-B/NA NA &&
git update-index --add NA &&
echo extra >>NA &&
git read-tree -m $tree_O $tree_A $tree_B"
test_expect_success \
'3 - must match A in !O && A && !B case.' \
"rm -f .git/index AN &&
cp .orig-A/AN AN &&
git update-index --add AN &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'3 - matching A alone is OK in !O && A && !B case.' \
"rm -f .git/index AN &&
cp .orig-A/AN AN &&
git update-index --add AN &&
echo extra >>AN &&
git read-tree -m $tree_O $tree_A $tree_B"
test_expect_success \
'3 (fail) - must match A in !O && A && !B case.' "
rm -f .git/index AN &&
cp .orig-A/AN AN &&
echo extra >>AN &&
git update-index --add AN &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'4 - must match and be up-to-date in !O && A && B && A!=B case.' \
"rm -f .git/index AA &&
cp .orig-A/AA AA &&
git update-index --add AA &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'4 (fail) - must match and be up-to-date in !O && A && B && A!=B case.' "
rm -f .git/index AA &&
cp .orig-A/AA AA &&
git update-index --add AA &&
echo extra >>AA &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'4 (fail) - must match and be up-to-date in !O && A && B && A!=B case.' "
rm -f .git/index AA &&
cp .orig-A/AA AA &&
echo extra >>AA &&
git update-index --add AA &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'5 - must match in !O && A && B && A==B case.' \
"rm -f .git/index LL &&
cp .orig-A/LL LL &&
git update-index --add LL &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'5 - must match in !O && A && B && A==B case.' \
"rm -f .git/index LL &&
cp .orig-A/LL LL &&
git update-index --add LL &&
echo extra >>LL &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'5 (fail) - must match A in !O && A && B && A==B case.' "
rm -f .git/index LL &&
cp .orig-A/LL LL &&
echo extra >>LL &&
git update-index --add LL &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'6 - must not exist in O && !A && !B case' "
rm -f .git/index DD &&
echo DD >DD
git update-index --add DD &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'7 - must not exist in O && !A && B && O!=B case' "
rm -f .git/index DM &&
cp .orig-B/DM DM &&
git update-index --add DM &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'8 - must not exist in O && !A && B && O==B case' "
rm -f .git/index DN &&
cp .orig-B/DN DN &&
git update-index --add DN &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'9 - must match and be up-to-date in O && A && !B && O!=A case' \
"rm -f .git/index MD &&
cp .orig-A/MD MD &&
git update-index --add MD &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'9 (fail) - must match and be up-to-date in O && A && !B && O!=A case' "
rm -f .git/index MD &&
cp .orig-A/MD MD &&
git update-index --add MD &&
echo extra >>MD &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'9 (fail) - must match and be up-to-date in O && A && !B && O!=A case' "
rm -f .git/index MD &&
cp .orig-A/MD MD &&
echo extra >>MD &&
git update-index --add MD &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'10 - must match and be up-to-date in O && A && !B && O==A case' \
"rm -f .git/index ND &&
cp .orig-A/ND ND &&
git update-index --add ND &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'10 (fail) - must match and be up-to-date in O && A && !B && O==A case' "
rm -f .git/index ND &&
cp .orig-A/ND ND &&
git update-index --add ND &&
echo extra >>ND &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'10 (fail) - must match and be up-to-date in O && A && !B && O==A case' "
rm -f .git/index ND &&
cp .orig-A/ND ND &&
echo extra >>ND &&
git update-index --add ND &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'11 - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' \
"rm -f .git/index MM &&
cp .orig-A/MM MM &&
git update-index --add MM &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'11 (fail) - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' "
rm -f .git/index MM &&
cp .orig-A/MM MM &&
git update-index --add MM &&
echo extra >>MM &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'11 (fail) - must match and be up-to-date in O && A && B && O!=A && O!=B && A!=B case' "
rm -f .git/index MM &&
cp .orig-A/MM MM &&
echo extra >>MM &&
git update-index --add MM &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'12 - must match A in O && A && B && O!=A && A==B case' \
"rm -f .git/index SS &&
cp .orig-A/SS SS &&
git update-index --add SS &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'12 - must match A in O && A && B && O!=A && A==B case' \
"rm -f .git/index SS &&
cp .orig-A/SS SS &&
git update-index --add SS &&
echo extra >>SS &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'12 (fail) - must match A in O && A && B && O!=A && A==B case' "
rm -f .git/index SS &&
cp .orig-A/SS SS &&
echo extra >>SS &&
git update-index --add SS &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'13 - must match A in O && A && B && O!=A && O==B case' \
"rm -f .git/index MN &&
cp .orig-A/MN MN &&
git update-index --add MN &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'13 - must match A in O && A && B && O!=A && O==B case' \
"rm -f .git/index MN &&
cp .orig-A/MN MN &&
git update-index --add MN &&
echo extra >>MN &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'14 - must match and be up-to-date in O && A && B && O==A && O!=B case' \
"rm -f .git/index NM &&
cp .orig-A/NM NM &&
git update-index --add NM &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'14 - may match B in O && A && B && O==A && O!=B case' \
"rm -f .git/index NM &&
cp .orig-B/NM NM &&
git update-index --add NM &&
echo extra >>NM &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'14 (fail) - must match and be up-to-date in O && A && B && O==A && O!=B case' "
rm -f .git/index NM &&
cp .orig-A/NM NM &&
git update-index --add NM &&
echo extra >>NM &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'14 (fail) - must match and be up-to-date in O && A && B && O==A && O!=B case' "
rm -f .git/index NM &&
cp .orig-A/NM NM &&
echo extra >>NM &&
git update-index --add NM &&
! git read-tree -m $tree_O $tree_A $tree_B
"
test_expect_success \
'15 - must match A in O && A && B && O==A && O==B case' \
"rm -f .git/index NN &&
cp .orig-A/NN NN &&
git update-index --add NN &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'15 - must match A in O && A && B && O==A && O==B case' \
"rm -f .git/index NN &&
cp .orig-A/NN NN &&
git update-index --add NN &&
echo extra >>NN &&
git read-tree -m $tree_O $tree_A $tree_B &&
check_result"
test_expect_success \
'15 (fail) - must match A in O && A && B && O==A && O==B case' "
rm -f .git/index NN &&
cp .orig-A/NN NN &&
echo extra >>NN &&
git update-index --add NN &&
! git read-tree -m $tree_O $tree_A $tree_B
"
# #16
test_expect_success \
'16 - A matches in one and B matches in another.' \
'rm -f .git/index F16 &&
echo F16 >F16 &&
git update-index --add F16 &&
tree0=`git write-tree` &&
echo E16 >F16 &&
git update-index F16 &&
tree1=`git write-tree` &&
git read-tree -m $tree0 $tree1 $tree1 $tree0 &&
git ls-files --stage'
test_done