End-to-end testing, also known as E2E testing, is a methodology used for ensuring that applications behave as expected and that the flow of data is maintained for all kinds of user tasks and processes. This type of testing approach starts from the end user’s perspective and simulates a real-world scenario. For example, on a sign-up form, you can expect a user to perform one or more of these actions:

• Enter a blank email and password
• Enter a valid email and password
• Enter an invalid email and password
• Click a sign-up button

You can use end-to-end testing to verify that all these actions work as a user might expect.

End-to-end testing may sound comprehensive, but there are many other testing methods that you should use with it to create a robust continuous integration practice.

Read the full blog on CircleCI.

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