Grails Goodness: Set Request Locale in Unit Tests

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Hubert Klein Ikkink

There is really no excuse to not write unit tests in Grails. The support for writing tests is excellent, also for testing code that has to deal with the locale set in a user's request. For example we could have a controller or taglib that needs to access the locale. In a unit test we can invoke the addPreferredLocale() method on the mocked request object and assign a locale. The code under test uses the custom locale we set via this method.

In the following controller we create a NumberFormat object based on the locale in the request.

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