Grails Goodness: Set Request Locale in Unit Tests

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.

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Integrating Karma 0.8 tests in Maven with Sonar(Cube) test coverage

NOTE: this blog post was written for version 0.8 of the Karma test runner.
An updated blog post for the new Karma 0.10 can be found here.

For my current project we are using Maven to build our AngularJS application.
Furthermore we use Sonar (recently renamed to SonarCube) to monitor our code standards / best practices and unit test coverage.

In this blog post we describe how to integrate the Karma (Testacular) test runner with Maven and how to add your AngularJS (or any JavaScript) application to SonarQube.
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Clone Hibernate Objects

When we want to clone an object there are several ways to do this
For instance we can implement Clonable, which makes it possible to duplicate an object. We also can create a new object manually by calling each setter or use a parameterised constructor.

In case we want to clone a Hibernate object, there is an extra option available which is more elegant: the Hibernate3BeanReplicator. The Hibernate3BeanReplicator is provided by Beanlib ( and it supports deep clones, so we can also clone related one-to-one objects easily.

For example we want to clone the Student object, including all child (one-to-one) objects.

When we use auto increment id’s or unique required fields, we manually have to set these values to null or use an unique value. Please note that we also set the Id of the RelatedObject to null.

As can be seen cloning an object can be very simple! More information can be found on