appp.sh: use the $( ... ) construct for command substitution

diff --git a/t/t0040-parse-options.sh b/t/t0040-parse-options.sh
index 244a43c9201a3d81d0931f5f127bd2dcfd068eba..65606df3ed8b87256273dc85056f57a404b71c99 100755 (executable)
--- a/t/t0040-parse-options.sh
+++ b/t/t0040-parse-options.sh
@@ -50,7 +50,7 @@ EOF
 
 test_expect_success 'test help' '
        test_must_fail test-parse-options -h > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_i18ncmp expect output
 '
 
@@ -75,7 +75,7 @@ check() {
        shift &&
        sed "s/^$what .*/$what $expect/" <expect.template >expect &&
        test-parse-options $* >output 2>output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 }
 
@@ -86,7 +86,7 @@ check_i18n() {
        shift &&
        sed "s/^$what .*/$what $expect/" <expect.template >expect &&
        test-parse-options $* >output 2>output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_i18ncmp expect output
 }
 
@@ -99,7 +99,7 @@ check_unknown() {
        esac &&
        cat expect.err >>expect &&
        test_must_fail test-parse-options $* >output 2>output.err &&
-       test ! -s output &&
+       test_must_be_empty output &&
        test_cmp expect output.err
 }
 
@@ -112,7 +112,7 @@ check_unknown_i18n() {
        esac &&
        cat expect.err >>expect &&
        test_must_fail test-parse-options $* >output 2>output.err &&
-       test ! -s output &&
+       test_must_be_empty output &&
        test_i18ncmp expect output.err
 }
 
@@ -149,7 +149,7 @@ test_expect_success 'short options' '
        test-parse-options -s123 -b -i 1729 -b -vv -n -F my.file \
        > output 2> output.err &&
        test_cmp expect output &&
-       test ! -s output.err
+       test_must_be_empty output.err
 '
 
 cat > expect << EOF
@@ -168,7 +168,7 @@ test_expect_success 'long options' '
        test-parse-options --boolean --integer 1729 --boolean --string2=321 \
                --verbose --verbose --no-dry-run --abbrev=10 --file fi.le\
                --obsolete > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -199,7 +199,7 @@ EOF
 test_expect_success 'intermingled arguments' '
        test-parse-options a1 --string 123 b1 --boolean -j 13 -- --boolean \
                > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -217,13 +217,13 @@ EOF
 
 test_expect_success 'unambiguously abbreviated option' '
        test-parse-options --int 2 --boolean --no-bo > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
 test_expect_success 'unambiguously abbreviated option with "="' '
        test-parse-options --int=2 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -246,7 +246,7 @@ EOF
 
 test_expect_success 'non ambiguous option (after two options it abbreviates)' '
        test-parse-options --st 123 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -256,7 +256,7 @@ EOF
 
 test_expect_success 'detect possible typos' '
        test_must_fail test-parse-options -boolean > output 2> output.err &&
-       test ! -s output &&
+       test_must_be_empty output &&
        test_cmp typo.err output.err
 '
 
@@ -266,7 +266,7 @@ EOF
 
 test_expect_success 'detect possible typos' '
        test_must_fail test-parse-options -ambiguous > output 2> output.err &&
-       test ! -s output &&
+       test_must_be_empty output &&
        test_cmp typo.err output.err
 '
 
@@ -285,7 +285,7 @@ EOF
 
 test_expect_success 'keep some options as arguments' '
        test-parse-options --quux > output 2> output.err &&
-        test ! -s output.err &&
+       test_must_be_empty output.err &&
         test_cmp expect output
 '
 
@@ -305,7 +305,7 @@ EOF
 test_expect_success 'OPT_DATE() and OPT_SET_PTR() work' '
        test-parse-options -t "1970-01-01 00:00:01 +0000" --default-string \
                foo -q > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -324,7 +324,7 @@ EOF
 
 test_expect_success 'OPT_CALLBACK() and OPT_BIT() work' '
        test-parse-options --length=four -b -4 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -352,13 +352,13 @@ EOF
 
 test_expect_success 'OPT_BIT() and OPT_SET_INT() work' '
        test-parse-options --set23 -bbbbb --no-or4 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
 test_expect_success 'OPT_NEGBIT() and OPT_SET_INT() work' '
        test-parse-options --set23 -bbbbb --neg-or4 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -376,19 +376,19 @@ EOF
 
 test_expect_success 'OPT_BIT() works' '
        test-parse-options -bb --or4 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
 test_expect_success 'OPT_NEGBIT() works' '
        test-parse-options -bb --no-neg-or4 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
 test_expect_success 'OPT_COUNTUP() with PARSE_OPT_NODASH works' '
        test-parse-options + + + + + + > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -406,7 +406,7 @@ EOF
 
 test_expect_success 'OPT_NUMBER_CALLBACK() works' '
        test-parse-options -12345 > output 2> output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '
 
@@ -424,7 +424,7 @@ EOF
 
 test_expect_success 'negation of OPT_NONEG flags is not ambiguous' '
        test-parse-options --no-ambig >output 2>output.err &&
-       test ! -s output.err &&
+       test_must_be_empty output.err &&
        test_cmp expect output
 '