{"id":832,"date":"2017-04-20T12:19:09","date_gmt":"2017-04-20T10:19:09","guid":{"rendered":"https:\/\/zaven.co\/blog\/?p=832"},"modified":"2025-04-08T19:55:09","modified_gmt":"2025-04-08T17:55:09","slug":"bdd-frameworks-part-3","status":"publish","type":"post","link":"https:\/\/zaven.co\/blog\/bdd-frameworks-part-3\/","title":{"rendered":"BDD frameworks (part 3)"},"content":{"rendered":"

In this series of articles, I am presenting selected<\/b> BDD<\/abbr> frameworks<\/strong>. In this part, I will talk about Spock \u2013 a unit testing framework.<\/p>\n

Writing unit tests with Spock framework<\/h1>\n

Spock<\/em> is a framework in which the test are written with a language called Groovy<\/em>. Here the natural language layer is not separated from the logic that is responsible for the test activity, but possesses the keywords given<\/code>, when<\/code>, and then<\/code>, which can help you understand the test.<\/p>\n

Test definition in Spock<\/h2>\n

In the Spock framework, a testing class must inherit from the Specification class:<\/p>\n

\nclass CalculateAreaTest extends Specification {\n} <\/code><\/pre>\n
The test begins with the phrase def<\/code>:<\/p>\n
\ndef \"Testing methods area of circle\"() {\n    given: \"init\"\n    def calculateArea = new CalculateArea()\n    def radius = 2\n    def expectedValue = 12.566370614359172\n    when: \"Calculation of the circle\"\n    def result = calculateArea.areaOfCircle(radius)\n    then: \"Check result\"\n    result == expectedValue\n}\n\n<\/code><\/pre>\n
Data Table \u2013 testing several values<\/h2>\n
An interesting option we can use here is the Data Table. Input and output of the test can be provided in the table. So that we can simultaneously check several values in one test.<\/p>\n
\ndef \"Testing methods area of circle - Data Tables\"(int radius, double expectedValue) {\n    given: \"init\"\n    def calculateArea = new CalculateArea()\n    expect: \"Checking the value from the table\"\n    calculateArea.areaOfCircle(radius) == expectedValue\n    where: \"Values for the variables\"\n    radius | expectedValue\n         1 | 3.141592653589793\n         7 | 153.93804002589985\n         0 | 0\n}\n\n<\/code><\/pre>\n
Testing the calling of a method<\/h2>\n
Another useful feature of Spock is to test whether a particular method has been performed. This function may be useful to us when the method we are testing comes from some interface and we have to check if it has been called a certain number of times.<\/p>\n
\ndef \"Testing methods area of square\"() {\n    given: \"init\"\n    def calculateArea = new CalculateArea()\n    def valueX = 2\n    def valueY = 2\n    def listener = Mock(OnSquareListener)\n    def expectedValue = 4\n    when: \"Calculation of the square\"\n    calculateArea.areaOfSquare(valueX, valueY, listener)\n    then: \"Verify that appropriate methods are called\"\n        1 * listener.onSuccess(expectedValue)\n        0 * listener.onFailed()\n}\n<\/code><\/pre>\n
In the code \"quantity\"<\/code> determines how many times a given method should be called: quantity * object.method().<\/code><\/p>\n
Additional elements<\/h2>\n
Sometimes we need additional Android elements. Such as context, for testing. For such needs, we can use additional annotations:<\/p>\n