Apex test classes help you check that your Salesforce code works correctly. This skill guides you through building them the right way. You will learn to set up test data, write meaningful assertions, and handle bulk records. It also helps you fix failing tests and improve your coverage.
The skill uses TestDataFactory patterns and mocking strategies. You will test with 251 or more records to catch bulk issues. Every test method checks one single behavior. You will use only the modern Assert class for verifications.
Whether you are creating new tests, debugging failures, or raising coverage above 75 percent, this skill gives you a clear workflow. It works for triggers, services, controllers, batch jobs, queueables, and integrations.
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