Adds basic test for convert command.

tests/commands/test_init.py

@@ -0,0 +1,15 @@
+import os
+
+from bonobo.util.testing import all_runners
+
+
+@all_runners
+def test_init_file(runner, tmpdir):
+    target = tmpdir.join('foo.py')
+    target_filename = str(target)
+    runner('init', target_filename)
+    assert os.path.exists(target_filename)
+
+    out, err = runner('run', target_filename)
+    assert out.replace('\n', ' ').strip() == 'Hello World'
+    assert not err