Adds basic test for convert command.

tests/commands/test_version.py

@@ -0,0 +1,20 @@
+from bonobo import __version__
+from bonobo.util.testing import all_runners
+
+
+@all_runners
+def test_version(runner):
+    out, err = runner('version')
+    out = out.strip()
+    assert out.startswith('bonobo ')
+    assert __version__ in out
+
+    out, err = runner('version', '-q')
+    out = out.strip()
+    assert out.startswith('bonobo ')
+    assert __version__ in out
+
+    out, err = runner('version', '-qq')
+    out = out.strip()
+    assert not out.startswith('bonobo ')
+    assert __version__ in out