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Unit Test: Maximum Length Constraint

Understand how to define and pass a unit test that restricts the name field to 100 characters in a Rails model. Learn the process of starting with the test, interpreting test failures, and implementing model validations to meet requirements.

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Defining the test

This test’s goal is to disallow more than 100 characters in the name field. Notice how we’re starting with the test. We’re describing the behavior we’d like to have, and only then do we implement it

Put the following test in ...