Update README.md

Joseph Luce · web-flow · commit 7b5db5bc72a5 · 2018-06-23T19:17:24.000-07:00
diff --git a/testing/README.md b/testing/README.md
@@ -1 +1,3 @@
 - https://nedbatchelder.com/ 
+- http://www.diveintopython.net/unit_testing/index.html
+- https://www.youtube.com/watch?v=1Lfv5tUGsn8&index=30&list=PLi01XoE8jYohWFPpC17Z-wWhPOSuh8Er-

Original file line number	Diff line number	Diff line change
`@@ -1 +1,3 @@`
`1`	`1`	`- https://nedbatchelder.com/`
	`2`	`+- http://www.diveintopython.net/unit_testing/index.html`
	`3`	`+- https://www.youtube.com/watch?v=1Lfv5tUGsn8&index=30&list=PLi01XoE8jYohWFPpC17Z-wWhPOSuh8Er-`