How to write a Data Driven Test in JUnit 4 - Parameterized Unit Test

This video demonstrates converting a JUnit test into a Parameterized data driven test.

In JUnit 4 to create a parameterized test we:

- annotate the test class with `@RunWith(Parameterized.class)`
- create a static method to provide the data
- this method should be annotated with `@Parameterized.Parameters`
- the method providing data should return a collection of object arrays
- we can provide a name attribute for the parameter method which dynamically changes the display name of the test
- our test class needs a constructor to setup the data when called by JUnit Runner
- our test methods do not take parameters but they all use the same data provided by the constructor

An explanatory blog post with links to the source code is here:

- eviltester.com/post/junit/junit-4-parameterized…

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