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Diffstat (limited to 't/t1000-read-tree-m-3way.sh')
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diff --git a/t/t1000-read-tree-m-3way.sh b/t/t1000-read-tree-m-3way.sh new file mode 100755 index 000000000000..013c5a7bc328 --- /dev/null +++ b/t/t1000-read-tree-m-3way.sh @@ -0,0 +1,511 @@ +#!/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 +. "$TEST_DIRECTORY"/lib-read-tree.sh +. "$TEST_DIRECTORY"/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 + +check_result () { + git ls-files --stage | sed -e 's/ '"$OID_REGEX"' / X /' >current && + test_cmp 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 && + read_tree_must_succeed -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 && + read_tree_must_succeed $tree_A && + git checkout-index -f -u -a && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -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 && + read_tree_must_fail -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 && + read_tree_must_succeed -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 && + read_tree_must_succeed -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 && + read_tree_must_fail -m $tree_O $tree_A $tree_B +' + +test_expect_success '16 - A matches in one and B matches in another.' ' + rm -f .git/index F16 && + echo F16 >F16 && + git update-index --add F16 && + tree0=$(git write-tree) && + echo E16 >F16 && + git update-index F16 && + tree1=$(git write-tree) && + read_tree_must_succeed -m $tree0 $tree1 $tree1 $tree0 && + git ls-files --stage +' + +test_done |