> For the complete documentation index, see [llms.txt](https://docs.browserflow.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.browserflow.app/reference/browserflow-commands/utilities/assert.md). # Assert Throws an error if the condition is not met #### **Conditions** See [Conditions](/guides/conditions.md) page ### Use cases #### Use case: Verify intermediate results during a flow Asserts can be used to verify that certain steps in a flow completed successfully. For example, if your flow submits a form, you can use `Assert` to check that some success text (e.g. "Your form was submitted successfully!") appears on the page. #### Use case: End-to-end testing Asserts can be used to test functionality in websites and web apps. For example, if you wanted to create a test to ensure that clicking the "Sign up" button on your home page takes the user to the sign up page, you can use `Assert` to check the result of [Get Page URL](/reference/browserflow-commands/extract-data/get-page-url.md) after clicking the button. ### Video demo {% embed url="" %}