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docs/devel/e2e-tests.md
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@@ -36,7 +36,7 @@ Documentation for other releases can be found at
## Overview
End-to-end (e2e) tests for Kubernetes provide a mechanism to test end-to-end behavior of the system, and is the last signal to ensure end user operations match developer specifications. Although unit and integration tests should ideally provide a good signal, the reality is in a distributed system like Kubernetes it is not uncommon that a minor change may pass all unit and integration tests, but cause unforseen changes at the system level. e2e testing is very costly, both in time to run tests and difficulty debugging, though: it takes a long time to build, deploy, and exercise a cluster. Thus, the primary objectives of the e2e tests are to ensure a consistent and reliable behavior of the kubernetes code base, and to catch hard-to-test bugs before users do, when unit and integration tests are insufficient.
End-to-end (e2e) tests for Kubernetes provide a mechanism to test end-to-end behavior of the system, and is the last signal to ensure end user operations match developer specifications. Although unit and integration tests should ideally provide a good signal, the reality is in a distributed system like Kubernetes it is not uncommon that a minor change may pass all unit and integration tests, but cause unforeseen changes at the system level. e2e testing is very costly, both in time to run tests and difficulty debugging, though: it takes a long time to build, deploy, and exercise a cluster. Thus, the primary objectives of the e2e tests are to ensure a consistent and reliable behavior of the kubernetes code base, and to catch hard-to-test bugs before users do, when unit and integration tests are insufficient.
The e2e tests in kubernetes are built atop of [Ginkgo](http://onsi.github.io/ginkgo/) and [Gomega](http://onsi.github.io/gomega/). There are a host of features that this BDD testing framework provides, and it is recommended that the developer read the documentation prior to diving into the tests.