Check if we got a valid command from argparse instead of catching exc…

…eption

- Fixes #52

jasmine/entry_points.py

@@ -60,10 +60,11 @@ def __init__(self, app, ci_runner):
 
     def run(self, argv):
         args = self.parser.parse_args(argv)
-        try:
+        if 'func' in args and callable(args.func):
             args.func(args)
-        except AttributeError:
+        else:
             self.parser.print_help()
+            self.parser.exit(1)
 
     def server(self, args):
         if self._check_for_config(args.config):

test/integration_test.py

@@ -114,3 +114,12 @@ def test_ci():
 
     assert '2 specs, 0 failed' in str(output)
     assert process.returncode == 0
+
+def test_help_fallback():
+    process = Popen([sys.executable, '-c', 'from jasmine.entry_points import begin; begin()'], stdout=PIPE)
+    output = process.communicate()[0]
+    process.wait()
+
+    assert 'usage:' in str(output)
+    assert 'Jasmine command line' in str(output)
+    assert process.returncode != 0