tests: use 'test_must_be_empty' instead of '! test -s'

Using 'test_must_be_empty' is preferable to '! test -s', because it
gives a helpful error message if the given file is unexpectedly not
empty, while the latter remains completely silent.  Furthermore, it
also catches cases when the given file unexpectedly does not exist at
all.

This patch was basically created by:

  sed -i -e 's/! test -s/test_must_be_empty/' t[0-9]*.sh

with the following notable exceptions:

  - The '! test -s' check in '.gitmodules ignore=dirty suppresses
    submodules with untracked content' in 't7508-status.sh' is left
    as-is, because it's bogus and, therefore, it's subject of a
    dedicated patch.

  - The '! test -s' checks in 't9131-git-svn-empty-symlink.sh' and
    't9135-git-svn-moved-branch-empty-file.sh' are immediately
    preceeded by a 'test -f' to ensure that the files exist in the
    first place.  'test_must_be_empty' ensures that as well, so those
    'test -f' commands are removed as well.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/t/t9131-git-svn-empty-symlink.sh b/t/t9131-git-svn-empty-symlink.sh
index f762038..3bf4255 100755
--- a/t/t9131-git-svn-empty-symlink.sh
+++ b/t/t9131-git-svn-empty-symlink.sh
@@ -85,7 +85,7 @@ EOF
 test_expect_success 'clone using git svn' 'git svn clone -r1 "$svnrepo" x'
 test_expect_success 'enable broken symlink workaround' \
   '(cd x && git config svn.brokenSymlinkWorkaround true)'
-test_expect_success '"bar" is an empty file' 'test -f x/bar && ! test -s x/bar'
+test_expect_success '"bar" is an empty file' 'test_must_be_empty x/bar'
 test_expect_success 'get "bar" => symlink fix from svn' \
 		'(cd x && git svn rebase)'
 test_expect_success SYMLINKS '"bar" becomes a symlink' 'test -h x/bar'
@@ -94,14 +94,14 @@ test_expect_success SYMLINKS '"bar" becomes a symlink' 'test -h x/bar'
 test_expect_success 'clone using git svn' 'git svn clone -r1 "$svnrepo" y'
 test_expect_success 'disable broken symlink workaround' \
   '(cd y && git config svn.brokenSymlinkWorkaround false)'
-test_expect_success '"bar" is an empty file' 'test -f y/bar && ! test -s y/bar'
+test_expect_success '"bar" is an empty file' 'test_must_be_empty y/bar'
 test_expect_success 'get "bar" => symlink fix from svn' \
 		'(cd y && git svn rebase)'
 test_expect_success '"bar" does not become a symlink' '! test -L y/bar'
 
 # svn.brokenSymlinkWorkaround is unset
 test_expect_success 'clone using git svn' 'git svn clone -r1 "$svnrepo" z'
-test_expect_success '"bar" is an empty file' 'test -f z/bar && ! test -s z/bar'
+test_expect_success '"bar" is an empty file' 'test_must_be_empty z/bar'
 test_expect_success 'get "bar" => symlink fix from svn' \
 		'(cd z && git svn rebase)'
 test_expect_success '"bar" does not become a symlink' '! test -L z/bar'