test: fix parser to prefer binop over unop, as coreutils does.

 remove bogus workaround in main(). rename atrocious variables/functions.
 much expand testsuite.
libbb: fix --help to not affect "test --help"

function                                             old     new   delta
run_applet_no_and_exit                               421     440     +19
nexpr                                                817     825      +8
static.no_op                                           -       6      +6
test_main                                            397     257    -140
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 2/1 up/down: 104/-211)         Total: -107 bytes

1 files changed, 50 insertions, 7 deletions

diff --git a/testsuite/test.tests b/testsuite/test.tests
index 351d35565..d4be949ec 100755
--- a/testsuite/test.tests
+++ b/testsuite/test.tests
@@ -5,22 +5,65 @@
 
 . testing.sh
 
-# testing "test name" "options" "expected result" "file input" "stdin"
+# testing "test name" "command" "expected result" "file input" "stdin"
 #   file input will be file called "input"
 #   test can create a file "actual" instead of writing to stdout
 
 # Need to call 'busybox test', otherwise shell builtin is used
 
-testing "test ! a = b -a ! c = c: should be false" \
+testing "test: should be false (1)" \
+        "busybox test; echo \$?" \
+        "1\n" \
+        "" ""
+
+testing "test '': should be false (1)" \
+        "busybox test ''; echo \$?" \
+        "1\n" \
+        "" ""
+
+testing "test a: should be true (0)" \
+        "busybox test a; echo \$?" \
+        "0\n" \
+        "" ""
+
+testing "test --help: should be true (0)" \
+        "busybox test --help; echo \$?" \
+        "0\n" \
+        "" ""
+
+testing "test -f: should be true (0)" \
+        "busybox test -f; echo \$?" \
+        "0\n" \
+        "" ""
+
+testing "test ! -f: should be false (1)" \
+        "busybox test ! -f; echo \$?" \
+        "1\n" \
+        "" ""
+
+testing "test a = a: should be true (0)" \
+        "busybox test a = a; echo \$?" \
+        "0\n" \
+        "" ""
+
+testing "test -lt = -gt: should be false (1)" \
+        "busybox test -lt = -gt; echo \$?" \
+        "1\n" \
+        "" ""
+
+testing "test -f = a -o b: should be true (0)" \
+        "busybox test -f = a -o b; echo \$?" \
+        "0\n" \
+        "" ""
+
+testing "test ! a = b -a ! c = c: should be false (1)" \
         "busybox test ! a = b -a ! c = c; echo \$?" \
         "1\n" \
-        "" \
-        "" \
+        "" ""
 
-testing "test ! a = b -a ! c = d: should be true" \
+testing "test ! a = b -a ! c = d: should be true (0)" \
         "busybox test ! a = b -a ! c = d; echo \$?" \
         "0\n" \
-        "" \
-        "" \
+        "" ""
 
 exit $FAILCOUNT