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-# Unit testing
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+# Unit Testing
+
+Unit testing is where individual __units__ (modules, functions/methods, routines, etc.) of software are tested to ensure their correctness. This low-level testing ensures smaller components are functionally sound while taking the burden off of higher-level tests. Generally, a developer writes these tests during the development process and they are run as automated tests.
+
+Free Content
+Unit Testing Tutorial
+What is Unit Testing?