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git/t/t3004-ls-files-basic.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='basic ls-files tests
This test runs git ls-files with various unusual or malformed
command-line arguments.
'
. ./test-lib.sh
test_expect_success 'ls-files in empty repository' '
git ls-files >actual &&
test_must_be_empty actual
'
test_expect_success 'ls-files with nonexistent path' '
git ls-files doesnotexist >actual &&
test_must_be_empty actual
'
test_expect_success 'ls-files with nonsense option' '
test_expect_code 129 git ls-files --nonsense 2>actual &&
test_i18ngrep "[Uu]sage: git ls-files" actual
'
test_expect_success 'ls-files -h in corrupt repository' '
mkdir broken &&
(
cd broken &&
git init &&
>.git/index &&
test_expect_code 129 git ls-files -h >usage 2>&1
) &&
test_i18ngrep "[Uu]sage: git ls-files " broken/usage
'
test_expect_success SYMLINKS 'ls-files with absolute paths to symlinks' '
mkdir subs &&
ln -s nosuch link &&
ln -s ../nosuch subs/link &&
git add link subs/link &&
git ls-files -s link subs/link >expect &&
git ls-files -s "$(pwd)/link" "$(pwd)/subs/link" >actual &&
test_cmp expect actual &&
(
cd subs &&
git ls-files -s link >../expect &&
git ls-files -s "$(pwd)/link" >../actual
) &&
test_cmp expect actual
'
test_done