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git/t/t0030-stripspace.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) 2007 Carlos Rica
#
test_description='git stripspace'
. ./test-lib.sh
t40='A quick brown fox jumps over the lazy do'
s40=' '
sss="$s40$s40$s40$s40$s40$s40$s40$s40$s40$s40" # 400
ttt="$t40$t40$t40$t40$t40$t40$t40$t40$t40$t40" # 400
test_expect_success \
'long lines without spaces should be unchanged' '
echo "$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$ttt$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$ttt$ttt$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$ttt$ttt$ttt$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual
'
test_expect_success \
'lines with spaces at the beginning should be unchanged' '
echo "$sss$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$sss$sss$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$sss$sss$sss$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual
'
test_expect_success \
'lines with intermediate spaces should be unchanged' '
echo "$ttt$sss$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual &&
echo "$ttt$sss$sss$ttt" >expect &&
git stripspace <expect >actual &&
test_cmp expect actual
'
test_expect_success \
'consecutive blank lines should be unified' '
printf "$ttt\n\n$ttt\n" > expect &&
printf "$ttt\n\n\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n\n$ttt\n" > expect &&
printf "$ttt$ttt\n\n\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt\n\n$ttt\n" > expect &&
printf "$ttt$ttt$ttt\n\n\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt\n" > expect &&
printf "$ttt\n\n\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt$ttt\n" > expect &&
printf "$ttt\n\n\n\n\n$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt$ttt$ttt\n" > expect &&
printf "$ttt\n\n\n\n\n$ttt$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt\n" > expect &&
printf "$ttt\n\t\n \n\n \t\t\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n\n$ttt\n" > expect &&
printf "$ttt$ttt\n\t\n \n\n \t\t\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt\n\n$ttt\n" > expect &&
printf "$ttt$ttt$ttt\n\t\n \n\n \t\t\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt\n" > expect &&
printf "$ttt\n\t\n \n\n \t\t\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt$ttt\n" > expect &&
printf "$ttt\n\t\n \n\n \t\t\n$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$ttt$ttt$ttt\n" > expect &&
printf "$ttt\n\t\n \n\n \t\t\n$ttt$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual
'
test_expect_success \
'only consecutive blank lines should be completely removed' '
printf "\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "\n\n\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss\n$sss\n$sss\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss$sss\n$sss\n\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "\n$sss\n$sss$sss\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss$sss$sss$sss\n\n\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "\n$sss$sss$sss$sss\n\n" | git stripspace >actual &&
test_must_be_empty actual &&
printf "\n\n$sss$sss$sss$sss\n" | git stripspace >actual &&
test_must_be_empty actual
'
test_expect_success \
'consecutive blank lines at the beginning should be removed' '
printf "$ttt\n" > expect &&
printf "\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" > expect &&
printf "\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n" > expect &&
printf "\n\n\n$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt\n" > expect &&
printf "\n\n\n$ttt$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt$ttt\n" > expect &&
printf "\n\n\n$ttt$ttt$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" > expect &&
printf "$sss\n$sss\n$sss\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "\n$sss\n$sss$sss\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$sss$sss\n$sss\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$sss$sss$sss\n\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "\n$sss$sss$sss\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "\n\n$sss$sss$sss\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual
'
test_expect_success \
'consecutive blank lines at the end should be removed' '
printf "$ttt\n" > expect &&
printf "$ttt\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" > expect &&
printf "$ttt\n\n\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n" > expect &&
printf "$ttt$ttt\n\n\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt\n" > expect &&
printf "$ttt$ttt$ttt\n\n\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt$ttt\n" > expect &&
printf "$ttt$ttt$ttt$ttt\n\n\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" > expect &&
printf "$ttt\n$sss\n$sss\n$sss\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$sss\n$sss$sss\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$sss$sss\n$sss\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$sss$sss$sss\n\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n$sss$sss$sss\n\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n\n\n$sss$sss$sss\n" | git stripspace >actual &&
test_cmp expect actual
'
test_expect_success \
'text without newline at end should end with newline' '
test $(printf "$ttt" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt$ttt" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt$ttt$ttt" | git stripspace | wc -l) -gt 0
'
# text plus spaces at the end:
test_expect_success \
'text plus spaces without newline at end should end with newline' '
test $(printf "$ttt$sss" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt$sss" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt$ttt$sss" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$sss$sss" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$ttt$sss$sss" | git stripspace | wc -l) -gt 0 &&
test $(printf "$ttt$sss$sss$sss" | git stripspace | wc -l) -gt 0
'
test_expect_success \
'text plus spaces without newline at end should not show spaces' '
! (printf "$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$ttt$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$ttt$ttt$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$ttt$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$ttt$ttt$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$ttt$sss$sss$sss" | git stripspace | grep " " >/dev/null)
'
test_expect_success \
'text plus spaces without newline should show the correct lines' '
printf "$ttt\n" >expect &&
printf "$ttt$sss" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" >expect &&
printf "$ttt$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n" >expect &&
printf "$ttt$sss$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n" >expect &&
printf "$ttt$ttt$sss" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n" >expect &&
printf "$ttt$ttt$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt$ttt\n" >expect &&
printf "$ttt$ttt$ttt$sss" | git stripspace >actual &&
test_cmp expect actual
'
test_expect_success \
'text plus spaces at end should not show spaces' '
! (echo "$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (echo "$ttt$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (echo "$ttt$ttt$ttt$sss" | git stripspace | grep " " >/dev/null) &&
! (echo "$ttt$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (echo "$ttt$ttt$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (echo "$ttt$sss$sss$sss" | git stripspace | grep " " >/dev/null)
'
test_expect_success \
'text plus spaces at end should be cleaned and newline must remain' '
echo "$ttt" >expect &&
echo "$ttt$sss" | git stripspace >actual &&
test_cmp expect actual &&
echo "$ttt" >expect &&
echo "$ttt$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
echo "$ttt" >expect &&
echo "$ttt$sss$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
echo "$ttt$ttt" >expect &&
echo "$ttt$ttt$sss" | git stripspace >actual &&
test_cmp expect actual &&
echo "$ttt$ttt" >expect &&
echo "$ttt$ttt$sss$sss" | git stripspace >actual &&
test_cmp expect actual &&
echo "$ttt$ttt$ttt" >expect &&
echo "$ttt$ttt$ttt$sss" | git stripspace >actual &&
test_cmp expect actual
'
# spaces only:
test_expect_success \
'spaces with newline at end should be replaced with empty string' '
echo | git stripspace >actual &&
test_must_be_empty actual &&
echo "$sss" | git stripspace >actual &&
test_must_be_empty actual &&
echo "$sss$sss" | git stripspace >actual &&
test_must_be_empty actual &&
echo "$sss$sss$sss" | git stripspace >actual &&
test_must_be_empty actual &&
echo "$sss$sss$sss$sss" | git stripspace >actual &&
test_must_be_empty actual
'
test_expect_success \
'spaces without newline at end should not show spaces' '
! (printf "" | git stripspace | grep " " >/dev/null) &&
! (printf "$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$sss$sss$sss" | git stripspace | grep " " >/dev/null) &&
! (printf "$sss$sss$sss$sss" | git stripspace | grep " " >/dev/null)
'
test_expect_success \
'spaces without newline at end should be replaced with empty string' '
printf "" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss$sss" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss$sss$sss" | git stripspace >actual &&
test_must_be_empty actual &&
printf "$sss$sss$sss$sss" | git stripspace >actual &&
test_must_be_empty actual
'
test_expect_success \
'consecutive text lines should be unchanged' '
printf "$ttt$ttt\n$ttt\n" >expect &&
printf "$ttt$ttt\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$ttt$ttt\n$ttt\n" >expect &&
printf "$ttt\n$ttt$ttt\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$ttt\n$ttt\n$ttt$ttt\n" >expect &&
printf "$ttt\n$ttt\n$ttt\n$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$ttt\n\n$ttt$ttt\n$ttt\n" >expect &&
printf "$ttt\n$ttt\n\n$ttt$ttt\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt$ttt\n\n$ttt\n$ttt$ttt\n" >expect &&
printf "$ttt$ttt\n\n$ttt\n$ttt$ttt\n" | git stripspace >actual &&
test_cmp expect actual &&
printf "$ttt\n$ttt$ttt\n\n$ttt\n" >expect &&
printf "$ttt\n$ttt$ttt\n\n$ttt\n" | git stripspace >actual &&
test_cmp expect actual
'
test_expect_success 'strip comments, too' '
test ! -z "$(echo "# comment" | git stripspace)" &&
test -z "$(echo "# comment" | git stripspace -s)"
'
test_expect_success 'strip comments with changed comment char' '
test ! -z "$(echo "; comment" | git -c core.commentchar=";" stripspace)" &&
test -z "$(echo "; comment" | git -c core.commentchar=";" stripspace -s)"
'
test_expect_success '-c with single line' '
printf "# foo\n" >expect &&
printf "foo" | git stripspace -c >actual &&
test_cmp expect actual
'
test_expect_success '-c with single line followed by empty line' '
printf "# foo\n#\n" >expect &&
printf "foo\n\n" | git stripspace -c >actual &&
test_cmp expect actual
'
test_expect_success '-c with newline only' '
printf "#\n" >expect &&
printf "\n" | git stripspace -c >actual &&
test_cmp expect actual
'
test_expect_success '--comment-lines with single line' '
printf "# foo\n" >expect &&
printf "foo" | git stripspace -c >actual &&
test_cmp expect actual
'
test_expect_success '-c with changed comment char' '
printf "; foo\n" >expect &&
printf "foo" | git -c core.commentchar=";" stripspace -c >actual &&
test_cmp expect actual
'
test_expect_success '-c with comment char defined in .git/config' '
test_config core.commentchar = &&
printf "= foo\n" >expect &&
printf "foo" | (
mkdir sub && cd sub && git stripspace -c
) >actual &&
test_cmp expect actual
'
test_expect_success 'avoid SP-HT sequence in commented line' '
printf "#\tone\n#\n# two\n" >expect &&
printf "\tone\n\ntwo\n" | git stripspace -c >actual &&
test_cmp expect actual
'
test_done