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git/t/t1600-index.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
test_description='index file specific tests'
. ./test-lib.sh
test_expect_success 'setup' '
echo 1 >a
'
test_expect_success 'bogus GIT_INDEX_VERSION issues warning' '
(
rm -f .git/index &&
GIT_INDEX_VERSION=2bogus &&
export GIT_INDEX_VERSION &&
git add a 2>&1 | sed "s/[0-9]//" >actual.err &&
sed -e "s/ Z$/ /" <<-\EOF >expect.err &&
warning: GIT_INDEX_VERSION set, but the value is invalid.
Using version Z
EOF
test_i18ncmp expect.err actual.err
)
'
test_expect_success 'out of bounds GIT_INDEX_VERSION issues warning' '
(
rm -f .git/index &&
GIT_INDEX_VERSION=1 &&
export GIT_INDEX_VERSION &&
git add a 2>&1 | sed "s/[0-9]//" >actual.err &&
sed -e "s/ Z$/ /" <<-\EOF >expect.err &&
warning: GIT_INDEX_VERSION set, but the value is invalid.
Using version Z
EOF
test_i18ncmp expect.err actual.err
)
'
test_expect_success 'no warning with bogus GIT_INDEX_VERSION and existing index' '
(
GIT_INDEX_VERSION=1 &&
export GIT_INDEX_VERSION &&
git add a 2>actual.err &&
test_must_be_empty actual.err
)
'
test_expect_success 'out of bounds index.version issues warning' '
(
sane_unset GIT_INDEX_VERSION &&
rm -f .git/index &&
git config --add index.version 1 &&
git add a 2>&1 | sed "s/[0-9]//" >actual.err &&
sed -e "s/ Z$/ /" <<-\EOF >expect.err &&
warning: index.version set, but the value is invalid.
Using version Z
EOF
test_i18ncmp expect.err actual.err
)
'
test_expect_success 'GIT_INDEX_VERSION takes precedence over config' '
(
rm -f .git/index &&
GIT_INDEX_VERSION=4 &&
export GIT_INDEX_VERSION &&
git config --add index.version 2 &&
git add a 2>&1 &&
echo 4 >expect &&
test-tool index-version <.git/index >actual &&
test_cmp expect actual
)
'
test_done