utils: Include ws4py in --list-deps

mopidy/utils/deps.py

@@ -36,6 +36,7 @@ def format_dependency_list(adapters=None):
             dbus_info,
             serial_info,
             cherrypy_info,
+            ws4py_info,
         ]
 
     lines = []
@@ -201,3 +202,14 @@ def cherrypy_info():
     except ImportError:
         pass
     return dep_info
+
+
+def ws4py_info():
+    dep_info = {'name': 'ws4py'}
+    try:
+        import ws4py
+        dep_info['version'] = ws4py.__version__
+        dep_info['path'] = ws4py.__file__
+    except ImportError:
+        pass
+    return dep_info

tests/utils/deps_test.py

@@ -32,6 +32,11 @@ try:
 except ImportError:
     cherrypy = False
 
+try:
+    import ws4py
+except ImportError:
+    ws4py = False
+
 from mopidy.utils import deps
 
 from tests import unittest
@@ -128,3 +133,11 @@ class DepsTest(unittest.TestCase):
         self.assertEquals('cherrypy', result['name'])
         self.assertEquals(cherrypy.__version__, result['version'])
         self.assertIn('cherrypy', result['path'])
+
+    @unittest.skipUnless(ws4py, 'ws4py not found')
+    def test_ws4py_info(self):
+        result = deps.ws4py_info()
+
+        self.assertEquals('ws4py', result['name'])
+        self.assertEquals(ws4py.__version__, result['version'])
+        self.assertIn('ws4py', result['path'])