Extending Geb Navigators to work with Third Party Javascript Libraries

In Asgard, we use the select2 jQuery library to make combo boxes on our pages more user friendly.

This causes a problem when writing functional tests, however, since you cannot use the default drop down selection mechanisms provided by Geb.

A pretty powerful technique mentioned in Marcin Edrmann’s Advanced Geb talk is to extend the default navigators to provide your own methods to acommodate third party libraries.

In this post, I will show you how we use this to provide our own dropdown selection method.

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Mocking out Amazon AWS SDK with the Betamax Recording Proxy for testing

One of the ways you can make your testing more efficient is to mock out external services.

If you are using Amazon Web Services in your application, you can use the Betamax proxy to record and playback responses so they are consistent across your tests.

Here is an example Spock specification on how to mock out the SDK’s http service so it plays nice with Betamax:

    @Betamax(tape = "mytape")
    void 'can use betamax to stub out amazon service'() {

        // set up an AWS client configuration that uses a proxy
        ClientConfiguration clientConfig = new ClientConfiguration()
        clientConfig.proxyHost = ''
        clientConfig.proxyPort = 5555

        // configure your AWS client, here we use the SimpleDBClient as an example
        AmazonSimpleDBClient simpleDbClient = new AmazonSimpleDBClient(
            new BasicAWSCredentials('accessKey', 'secretKey'),
        // setup the betamax proxy on the AWS SDK's httpClient

        // now, when a request is made, the test will first check on the betamax tape to see if it has been previously recorded.
        SelectResult result = simpleDbClient.select(new SelectRequest("select * from MYRESOURCELIST limit 20", true))
        result.size() == 20

Test your applications against the nightly builds of Grails

One of the cool things the team at Sky used to do was to test the codebase against the latest nightly build of Grails.

This allowed us to quickly catch regressions or incompatibilities as soon as they were checked into Grails. 

Here is a bash script that you can add to Jenkins to do so for Grails 2.3.x 

#download grails nightly
curl -O http://hudson.grails.org/job/grails_core_2.3.x/lastSuccessfulBuild/artifact/build/distributions/${GRAILS_NIGHTLY}.zip

#install jar files into local maven repository
for f in *BUILD-SNAPSHOT.pom; 
   mvn install:install-file -Dfile=${f/.pom/.jar} -DpomFile=$f 
cd ../../

#set environment variables
export PATH="$PATH:$GRAILS_HOME/bin"

#test grails app
grails upgrade --non-interactive
grails test-app --non-interactive

Set it to run once and day and you can guarantee that your code is compatible with changes that are happening within Grails.

Caution: Your project needs to be compatible with at least Grails 2.3.0 for this script to work as the versioning for the Tomcat and Hibernate plugins have changed from previous versions.

Yeoman Generator for Spring Boot update 0.1.1

I’ve updated the yeoman generator for Spring Boot thanks to the London Hackergarten tonight at Skills Matter.

The new version adds two more sub generators that you can use for your project.

You can already generate a RESTful web service endpoint by calling yo spring:rest

Now, you can generate a Hypermedia Driven ( hateoas ) service endpoint via yo spring:hateoas

If you want a more traditional web content via Spring MVC, we also added a sub generator for it. Just call yo spring:route.

(We borrowed angular’s route generator because calling it web seemed kinda weird).

You can update to 0.1.1 version of the package via npm update -g generator-spring

A Spring Boot Generator for Yeoman

I am currently playing around a bit with Spring Boot.

It’s quite a neat project, but I found that having to set up the projects involved a bit of copy and paste from the Spring.io guide pages. Wouldn’t it be great if you had an easier tool to deal with project templating and generation?

As an avid user of the Yeoman generator for my Angular projects, I decided to write a small Spring Boot generator that will include the correct starters and help me scaffold my services. At the end, it ended up being very close to the scaffolding functionality available to other tools like Grails and Play.

Video Demo

Here is a 2 minute video I put together showing the tool in action:

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Testing Spring Boot Applications with Spock

I am starting to get familiar with Spring Boot thanks to the Guides on Spring.io and the samples that come with the project itself.

As a Grails developer, I love the Spock testing framework. Spock is a testing and specification framework that fully leverages groovy to help you write succinct and highly expressive tests. You can read more about Spock in the Framework documentation.

In this post, I want to show how you can use Spock to add easily readable tests for your Spring Boot applications.

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