Test Driven Development (TDD) with React, React Testing Library, and Jest

A strategy for writing good test  

• Write a test that fails (RED). This is to avoid false positives (tests passing when they shouldn’t be)
• Write the minimum amount of code required to get the test passing (GREEN).
• Refactor the code (REFACTOR). This might mean writing a more efficient technical solution or a more refined approach. As long as the test continues to stay green, you know there is no regression.