[qa] add test for bonobo run <path>.

bonobo/examples/types/__main__.py

@@ -0,0 +1,3 @@
+from bonobo.util.python import require
+
+graph = require('strings').graph

tests/test_commands.py

@@ -59,6 +59,15 @@ def test_run_module(runner, capsys):
     assert out[1].startswith('Bar ')
     assert out[2].startswith('Baz ')
 
+@all_runners
+def test_run_path(runner, capsys):
+    runner('run', '--quiet', get_examples_path('types'))
+    out, err = capsys.readouterr()
+    out = out.split('\n')
+    assert out[0].startswith('Foo ')
+    assert out[1].startswith('Bar ')
+    assert out[2].startswith('Baz ')
+
 
 @all_runners
 def test_version(runner, capsys):