[tests] Maybe patching the platform call fixes the issue with Travis

tests/test_modules.py

@@ -16,17 +16,27 @@ class TestGenericModules(unittest.TestCase):
         engine.input = mock.Mock()
         config = Config()
         self.objects = {}
+
+        self.popen = mocks.MockPopen()
+        self.popen.mock.communicate.return_value = (str.encode("1"), "error")
+        self.popen.mock.returncode = 0
+
+        self._platform = mock.patch("bumblebee.modules.kernel.platform")
+        self.platform = self._platform.start()
+        self.platform.release.return_value = "unknown linux v1"
+
         for mod in all_modules():
-            cls = importlib.import_module("bumblebee.modules.{}".format(mod["name"]))
+            name = "bumblebee.modules.{}".format(mod["name"])
+            cls = importlib.import_module(name)
             self.objects[mod["name"]] = getattr(cls, "Module")(engine, {"config": config})
             for widget in self.objects[mod["name"]].widgets():
                 self.assertEquals(widget.get("variable", None), None)
 
-    def test_widgets(self):
-        popen = mocks.MockPopen()
-        popen.mock.communicate.return_value = (str.encode("1"), "error")
-        popen.mock.returncode = 0
+    def tearDown(self):
+        self._platform.stop()
+        self.popen.cleanup()
 
+    def test_widgets(self):
         for mod in self.objects:
             widgets = self.objects[mod].widgets()
             for widget in widgets:
@@ -37,17 +47,12 @@ class TestGenericModules(unittest.TestCase):
                 widget.set("variable", "value")
                 self.assertEquals(widget.get("variable", None), "value")
                 self.assertTrue(isinstance(widget.full_text(), str) or isinstance(widget.full_text(), unicode))
-        popen.cleanup()
 
     def test_update(self):
-        popen = mocks.MockPopen()
-        popen.mock.communicate.return_value = (str.encode("1"), "error")
-        popen.mock.returncode = 0
         for mod in self.objects:
             widgets = self.objects[mod].widgets()
             self.objects[mod].update(widgets)
             self.test_widgets()
             self.assertEquals(widgets, self.objects[mod].widgets())
-        popen.cleanup()
 
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