added test for pixel.stop_blink().

README.md

@@ -8,7 +8,7 @@
 [![Build Status](https://travis-ci.org/speratus/Blinkter.svg?branch=master)](https://travis-ci.org/speratus/Blinkter)
 
 [![Gitter](https://badges.gitter.im/raspberrypi-blinkter/community.svg)](https://gitter.im/raspberrypi-blinkter/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
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+[![Discord](https://img.shields.io/discord/610943654806159453?label=discord&logo=discord)](https://discord.gg/YqRfXwJ)
 
 Blinkter makes using the [Pimoroni Blinkt!](https://shop.pimoroni.com/products/blinkt) even  easier by making the library object oriented and 
 adding several convenience methods. The intuitive objects that Blinkter layers on top of the [Blinkt!](https://github.com/pimoroni/blinkt)

tests.py

@@ -317,6 +317,13 @@ def test_advanced_blink(self, mock_set, mock_start, mock_revert, mock_black):
         self.assertEqual(2, mock_black.call_count, msg=f'pixel.black() was not called the correct number of times.')
         self.assertEqual(len(self.cases), mock_start.call_count, msg=f'AdvancedBlinkThread.start() was not called {len(self.cases)} times.')
 
+    @mock.patch.object(Pixel, 'black', autospec=True)
+    @mock.patch.object(AdvancedBlinkThread, 'stop', autospec=True)
+    def test_stop_blink(self, mock_stop, mock_black):
+        self.pixel.stop_blink()
+        mock_stop.assert_called()
+        mock_black.assert_called()
+
 
 if __name__ == '__main__':
     unittest.main()