Add related to topic "testing"

Author: shaedrich

topics/testing/index.md

@@ -4,6 +4,7 @@ display_name: Testing
 short_description: Eliminate bugs and ship with more confidence by adding these tools to your workflow.
 topic: testing
 wikipedia_url: https://en.wikipedia.org/wiki/Software_testing
+related: unit-testing, integration-testing, test-automation, e2e-testing, fuzzing, smoke-tests, mutation-testing, rspec, regression-testing, xunit
 ---
 Testing is the practice of systematically testing software to make sure it works. Testing can be iterative, and happen multiple times.
 Eliminate bugs and ship with more confidence by adding these tools to your workflow.