Salesforce Unit tests - A unit test is code that is written and executed to test a specific portion/unit of source code. Unit tests are class methods with the testMethod modifier or @

A unit test is code that is written and executed to test a specific portion/unit of source code. Unit tests are class methods with the testMethod modifier or @isTest annotation and are usually placed in separate test classes annotated with the @isTest annotation. Code that is executed by unit tests is considered covered. At least 75% of an organization's codebase must be covered by unit tests and every trigger must have at least 1% unit test coverage.
Attribution to: Peter Knolle
This content is remixed from stackoverflow or stackexchange. Please visit https://salesforce.stackexchange.com/questions/698