git-commit-vandalism/t/t6200-fmt-merge-msg.sh
SZEDER Gábor 1c5e94f459 tests: use 'test_must_be_empty' instead of 'test_cmp <empty> <out>'
Using 'test_must_be_empty' is shorter and more idiomatic than

  >empty &&
  test_cmp empty out

as it saves the creation of an empty file.  Furthermore, sometimes the
expected empty file doesn't have such a descriptive name like 'empty',
and its creation is far away from the place where it's finally used
for comparison (e.g. in 't7600-merge.sh', where two expected empty
files are created in the 'setup' test, but are used only about 500
lines later).

These cases were found by instrumenting 'test_cmp' to error out the
test script when it's used to compare empty files, and then converted
manually.

Note that even after this patch there still remain a lot of cases
where we use 'test_cmp' to check empty files:

  - Sometimes the expected output is not hard-coded in the test, but
    'test_cmp' is used to ensure that two similar git commands produce
    the same output, and that output happens to be empty, e.g. the
    test 'submodule update --merge  - ignores --merge  for new
    submodules' in 't7406-submodule-update.sh'.

  - Repetitive common tasks, including preparing the expected results
    and running 'test_cmp', are often extracted into a helper
    function, and some of this helper's callsites expect no output.

  - For the same reason as above, the whole 'test_expect_success'
    block is within a helper function, e.g. in 't3070-wildmatch.sh'.

  - Or 'test_cmp' is invoked in a loop, e.g. the test 'cvs update
    (-p)' in 't9400-git-cvsserver-server.sh'.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-21 11:48:36 -07:00

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#!/bin/sh
#
# Copyright (c) 2006, Junio C Hamano
#
test_description='fmt-merge-msg test'
. ./test-lib.sh
test_expect_success setup '
echo one >one &&
git add one &&
test_tick &&
git commit -m "Initial" &&
git clone . remote &&
echo uno >one &&
echo dos >two &&
git add two &&
test_tick &&
git commit -a -m "Second" &&
git checkout -b left &&
echo "c1" >one &&
test_tick &&
git commit -a -m "Common #1" &&
echo "c2" >one &&
test_tick &&
git commit -a -m "Common #2" &&
git branch right &&
echo "l3" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #3" &&
echo "l4" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #4" &&
echo "l5" >two &&
test_tick &&
GIT_COMMITTER_NAME="Another Committer" \
GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #5" &&
git tag tag-l5 &&
git checkout right &&
echo "r3" >three &&
git add three &&
test_tick &&
git commit -a -m "Right #3" &&
git tag tag-r3 &&
echo "r4" >three &&
test_tick &&
git commit -a -m "Right #4" &&
echo "r5" >three &&
test_tick &&
git commit -a -m "Right #5" &&
git checkout -b long &&
i=0 &&
while test $i -lt 30
do
test_commit $i one &&
i=$(($i+1))
done &&
git show-branch &&
apos="'\''"
'
test_expect_success 'message for merging local branch' '
echo "Merge branch ${apos}left${apos}" >expected &&
git checkout master &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'message for merging external branch' '
echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&
git checkout master &&
git fetch "$(pwd)" left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '[merge] summary/log configuration' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_config merge.log true &&
test_unconfig merge.summary &&
git checkout master &&
test_tick &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&
test_unconfig merge.log &&
test_config merge.summary true &&
git checkout master &&
test_tick &&
git fetch . left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&
test_cmp expected actual1 &&
test_cmp expected actual2
'
test_expect_success 'setup FETCH_HEAD' '
git checkout master &&
test_tick &&
git fetch . left
'
test_expect_success 'merge.log=3 limits shortlog length' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left: (5 commits)
Left #5
Left #4
Left #3
...
EOF
git -c merge.log=3 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge.log=5 shows all 5 commits' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git -c merge.log=5 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=5 with custom comment character' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
x By Another Author (3) and A U Thor (2)
x Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git -c core.commentchar="x" fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge.log=0 disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected &&
git -c merge.log=0 fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=3 limits shortlog length' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left: (5 commits)
Left #5
Left #4
Left #3
...
EOF
git fmt-merge-msg --log=3 <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=5 shows all 5 commits' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
git fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--no-log disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected &&
git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success '--log=0 disables shortlog' '
echo "Merge branch ${apos}left${apos}" >expected &&
git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'fmt-merge-msg -m' '
echo "Sync with left" >expected &&
cat >expected.log <<-EOF &&
Sync with left
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* ${apos}left${apos} of $(pwd):
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_unconfig merge.log &&
test_unconfig merge.summary &&
git checkout master &&
git fetch "$(pwd)" left &&
git fmt-merge-msg -m "Sync with left" <.git/FETCH_HEAD >actual &&
git fmt-merge-msg --log -m "Sync with left" \
<.git/FETCH_HEAD >actual.log &&
test_config merge.log true &&
git fmt-merge-msg -m "Sync with left" \
<.git/FETCH_HEAD >actual.log-config &&
git fmt-merge-msg --no-log -m "Sync with left" \
<.git/FETCH_HEAD >actual.nolog &&
test_cmp expected actual &&
test_cmp expected.log actual.log &&
test_cmp expected.log actual.log-config &&
test_cmp expected actual.nolog
'
test_expect_success 'setup: expected shortlog for two branches' '
cat >expected <<-EOF
Merge branches ${apos}left${apos} and ${apos}right${apos}
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
* right:
Right #5
Right #4
Right #3
Common #2
Common #1
EOF
'
test_expect_success 'shortlog for two branches' '
test_config merge.log true &&
test_unconfig merge.summary &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&
test_unconfig merge.log &&
test_config merge.summary true &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&
test_config merge.log yes &&
test_unconfig merge.summary &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual3 &&
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg <.git/FETCH_HEAD >actual4 &&
test_cmp expected actual1 &&
test_cmp expected actual2 &&
test_cmp expected actual3 &&
test_cmp expected actual4
'
test_expect_success 'merge-msg -F' '
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
git fmt-merge-msg -F .git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg -F in subdirectory' '
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . left right &&
mkdir sub &&
cp .git/FETCH_HEAD sub/FETCH_HEAD &&
(
cd sub &&
git fmt-merge-msg -F FETCH_HEAD >../actual
) &&
test_cmp expected actual
'
test_expect_success 'merge-msg with nothing to merge' '
test_unconfig merge.log &&
test_config merge.summary yes &&
(
cd remote &&
git checkout -b unrelated &&
test_tick &&
git fetch origin &&
git fmt-merge-msg <.git/FETCH_HEAD >../actual
) &&
test_must_be_empty actual
'
test_expect_success 'merge-msg tag' '
cat >expected <<-EOF &&
Merge tag ${apos}tag-r3${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
EOF
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg two tags' '
cat >expected <<-EOF &&
Merge tags ${apos}tag-r3${apos} and ${apos}tag-l5${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* tag ${apos}tag-l5${apos}:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 tag tag-l5 &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg tag and branch' '
cat >expected <<-EOF &&
Merge branch ${apos}left${apos}, tag ${apos}tag-r3${apos}
* tag ${apos}tag-r3${apos}:
Right #3
Common #2
Common #1
# By Another Author (3) and A U Thor (2)
# Via Another Committer
* left:
Left #5
Left #4
Left #3
Common #2
Common #1
EOF
test_unconfig merge.log &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . tag tag-r3 left &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg lots of commits' '
{
cat <<-EOF &&
Merge branch ${apos}long${apos}
* long: (35 commits)
EOF
i=29 &&
while test $i -gt 9
do
echo " $i" &&
i=$(($i-1))
done &&
echo " ..."
} >expected &&
test_config merge.summary yes &&
git checkout master &&
test_tick &&
git fetch . long &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
test_cmp expected actual
'
test_expect_success 'merge-msg with "merging" an annotated tag' '
test_config merge.log true &&
git checkout master^0 &&
git commit --allow-empty -m "One step ahead" &&
git tag -a -m "An annotated one" annote HEAD &&
git checkout master &&
git fetch . annote &&
git fmt-merge-msg <.git/FETCH_HEAD >actual &&
{
cat <<-\EOF
Merge tag '\''annote'\''
An annotated one
* tag '\''annote'\'':
One step ahead
EOF
} >expected &&
test_cmp expected actual &&
test_when_finished "git reset --hard" &&
annote=$(git rev-parse annote) &&
git merge --no-commit --no-ff $annote &&
{
cat <<-EOF
Merge tag '\''$annote'\''
An annotated one
* tag '\''$annote'\'':
One step ahead
EOF
} >expected &&
test_cmp expected .git/MERGE_MSG
'
test_done