Adding Agent unit test and asserting calls to logging.

tests/test_scheduler.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+import mock
+import unittest
+import sys
+sys.modules['schedule'] = mock.Mock()
+from cachet_url_monitor.scheduler import Agent
+
+
+class AgentTest(unittest.TestCase):
+    def setUp(self):
+        self.configuration = mock.Mock()
+        self.agent = Agent(self.configuration)
+
+    def test_init(self):
+        assert self.agent.configuration == self.configuration
+
+    def test_execute(self):
+        evaluate = self.configuration.evaluate
+        push_status_and_metrics = self.configuration.push_status_and_metrics
+        self.agent.execute()
+
+        evaluate.assert_called_once()
+        push_status_and_metrics.assert_called_once()
+
+    def test_start(self):
+        every = sys.modules['schedule'].every
+        self.configuration.data = {'frequency': 5}
+
+        self.agent.start()
+
+        every.assert_called_with(5)