Guide Claude on writing fast, browser-free tests for Vaadin 25 Flow views with the Browserless Testing framework (formerly UI Unit Testing). This skill should be used when the user asks to "write a UI test", "unit test a view", "test without a browser", "use BrowserlessTest", "use UIUnitTest", "test a Vaadin component", "browser-free testing", "browserless testing", or needs help with the Vaadin browserless testing framework, component testers, navigation in tests, or mocking Spring beans in Vaadin view tests.
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