A locator strategy identifies target elements in a web document so automated tests can interact with them. Centralizing these strategies in a Page Object keeps location logic separate from test intent and gives teams one place to update when the interface changes. section 11.3.1 section 11.2
Choose and organize locator strategies around these practices:
- Use basic Selenium strategies such as By.id, By.css, or By.xpath when they identify the required element clearly. section 15.2.6
- Store locators as readable constants or class members instead of embedding selector details throughout test methods. section 11.2
- Parameterize repeated structures when several elements share the same HTML pattern, such as menu buttons distinguished by their labels. section 11.3.1
- Compose queries for complex widgets by locating a collection, filtering it by a nested label and matching text, then selecting the first result. section 15.2.6
A login Page Object
Define EMAIL_FIELD, PASSWORD_FIELD, and LOGIN_BUTTON once with By.id, then let signinWithCredentials() use those names. The test supplies credentials and calls the page method without repeating how the elements are located.
Finding a labeled form field
For an Angular Material form without test-friendly identifiers, locate mat-form-field elements, filter for a present mat-label whose text equals the requested name, and use the matching field for an interaction.
