git/t/t7811-grep-open.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='git grep --open-files-in-pager
'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-pager.sh
unset PAGER GIT_PAGER
test_expect_success 'setup' '
test_commit initial grep.h "
enum grep_pat_token {
GREP_PATTERN,
GREP_PATTERN_HEAD,
GREP_PATTERN_BODY,
GREP_AND,
GREP_OPEN_PAREN,
GREP_CLOSE_PAREN,
GREP_NOT,
GREP_OR,
};" &&
test_commit add-user revision.c "
}
if (seen_dashdash)
read_pathspec_from_stdin(revs, &sb, prune);
strbuf_release(&sb);
}
static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
{
append_grep_pattern(&revs->grep_filter, ptn, \"command line\", 0, what);
" &&
mkdir subdir &&
test_commit subdir subdir/grep.c "enum grep_pat_token" &&
test_commit uninteresting unrelated "hello, world" &&
echo GREP_PATTERN >untracked
'
test_expect_success SIMPLEPAGER 'git grep -O' '
cat >$less <<-\EOF &&
#!/bin/sh
printf "%s\n" "$@" >pager-args
EOF
chmod +x $less &&
cat >expect.less <<-\EOF &&
+/*GREP_PATTERN
grep.h
EOF
echo grep.h >expect.notless &&
PATH=.:$PATH git grep -O GREP_PATTERN >out &&
{
test_cmp expect.less pager-args ||
test_cmp expect.notless pager-args
} &&
test_must_be_empty out
'
test_expect_success 'git grep -O --cached' '
test_must_fail git grep --cached -O GREP_PATTERN >out 2>msg &&
test_i18ngrep open-files-in-pager msg
'
test_expect_success 'git grep -O --no-index' '
rm -f expect.less pager-args out &&
cat >expect <<-\EOF &&
grep.h
untracked
EOF
(
GIT_PAGER='\''printf "%s\n" >pager-args'\'' &&
export GIT_PAGER &&
git grep --no-index -O GREP_PATTERN >out
) &&
test_cmp expect pager-args &&
test_must_be_empty out
'
test_expect_success 'setup: fake "less"' '
cat >less <<-\EOF &&
#!/bin/sh
printf "%s\n" "$@" >actual
EOF
chmod +x less
'
test_expect_success 'git grep -O jumps to line in less' '
cat >expect <<-\EOF &&
+/*GREP_PATTERN
grep.h
EOF
GIT_PAGER=./less git grep -O GREP_PATTERN >out &&
test_cmp expect actual &&
test_must_be_empty out &&
git grep -O./less GREP_PATTERN >out2 &&
test_cmp expect actual &&
test_must_be_empty out2
'
test_expect_success 'modified file' '
rm -f actual &&
cat >expect <<-\EOF &&
+/*enum grep_pat_token
grep.h
revision.c
subdir/grep.c
unrelated
EOF
>empty &&
echo "enum grep_pat_token" >unrelated &&
test_when_finished "git checkout HEAD unrelated" &&
GIT_PAGER=./less git grep -F -O "enum grep_pat_token" >out &&
test_cmp expect actual &&
test_must_be_empty out
'
test_expect_success 'copes with color settings' '
rm -f actual &&
echo grep.h >expect &&
test_config color.grep always &&
test_config color.grep.filename yellow &&
test_config color.grep.separator green &&
git grep -O'\''printf "%s\n" >actual'\'' GREP_AND &&
test_cmp expect actual
'
test_expect_success 'run from subdir' '
rm -f actual &&
echo grep.c >expect &&
(
cd subdir &&
export GIT_PAGER &&
GIT_PAGER='\''printf "%s\n" >../args'\'' &&
git grep -O "enum grep_pat_token" >../out &&
git grep -O"pwd >../dir; :" "enum grep_pat_token" >../out2
) &&
case $(cat dir) in
*subdir)
: good
;;
*)
false
;;
esac &&
test_cmp expect args &&
test_must_be_empty out &&
test_must_be_empty out2
'
test_done