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What is Software Testing Automation Pyramid?

The Software Testing Automation Pyramid is a conceptual model that illustrates the various levels of automated testing within a software development process. It emphasizes the distribution of automated tests across three main layers: unit tests, integration tests, and end-to-end tests.

1. Unit Tests

Unit tests form the base of the pyramid and are designed to test individual components or functions of the software in isolation. They are often written by developers and are critical for ensuring that the smallest parts of the code behave as expected. Due to their speed and simplicity, unit tests are abundant, making them the foundation of a robust testing strategy.

2. Integration Tests

Layering above unit tests, integration tests focus on the interactions between different components or modules. These tests ensure that integrated parts of the application work together correctly. They are fewer in number than unit tests but are essential for identifying issues that may arise when various components interact.

3. End-to-End Tests

At the top of the pyramid are end-to-end tests, which validate the entire application from the user's perspective. These tests simulate real user scenarios and ensure that the application functions as expected across all layers. While they provide comprehensive coverage, they are the least numerous due to their complexity and longer execution time.

In summary, the Software Testing Automation Pyramid advocates for a balanced approach to automated testing, with a strong emphasis on unit tests, a moderate layer of integration tests, and a smaller number of end-to-end tests. Following this model helps ensure thorough testing while maintaining efficiency in the development lifecycle.

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