[tests] Add specific tests for CPU module

* Check that the left mouse button action works
* Check that the format is OK

see #23

tests/modules/test_cpu.py

@@ -0,0 +1,37 @@
+# pylint: disable=C0103,C0111
+
+import json
+import unittest
+import mock
+
+import bumblebee.input
+from bumblebee.input import I3BarInput
+from bumblebee.modules.cpu import Module
+from tests.util import MockEngine, assertPopen
+
+class TestCPUModule(unittest.TestCase):
+    def setUp(self):
+        self.engine = MockEngine()
+        self.engine.input = I3BarInput()
+        self.engine.input.need_event = True
+        self.module = Module(engine=self.engine, config={})
+
+    @mock.patch("sys.stdout")
+    def test_format(self, mock_output):
+        for widget in self.module.widgets():
+            self.assertEquals(len(widget.full_text()), len("00.00%"))
+
+    @mock.patch("subprocess.Popen")
+    @mock.patch("sys.stdin")
+    def test_leftclick(self, mock_input, mock_output):
+        mock_input.readline.return_value = json.dumps({
+            "name": self.module.id,
+            "button": bumblebee.input.LEFT_MOUSE,
+            "instance": None
+        })
+        self.engine.input.start()
+        self.engine.input.stop()
+        mock_input.readline.assert_any_call()
+        assertPopen(mock_output, "gnome-system-monitor")
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4