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DataPool

Introduction

This library is intended to be used with PHPUnit tool. DataPool is an iterable object which can be returned to a standard @dataprovider tagged function or it can be used to get specific datasets from a big datapool.

• It allows keeping low weight indexed array values separated from tests logic.
• It can return specific datasets attending to its dataset index.
• It can encapsulate dataset as an array to avoid large parameters lists.

Installation

You can install the component in the following ways:

• Use the official Github repository (https://github.com/mbarquin/datapool)
• Use composer : composer require mbarquin/datapool --dev

Usage

The main use purpose is via heritage, the final class will only contains a definition index and a dataArray, we can instance it into our test case as a dataprovider or as a normal object which vill provide us with predefined test cases.

There are more use cases in the example file /example/tests/src/exampleContactsModelTest.php

Custom dataPool Example:

    /**
     * Contacts datapool file for Testing purposes
     */
    class ContactsDataPool extends \DataPool\DataPool
    {

        /**
         * @var array Datapoolm fields definition to be merged with data
         */
        protected $definition = array(
            'name',
            'surname',
            'phone',
            'result'
        );

        /**
         * @var array Datasets array to be merged with definition and returned to tests
         */
        public $dataArray = array(
            'Test1'                  => array('Jack', 'Travis', '555999666', true),
            'Test2'                  => array('Mathew', 'Jones', '555888555', true),
            'Test3.NameSurnameEmpty' => array('', '', '555666555', false),
            'TestCase1.PhoneToLong'  => array('Gregor', 'Jones', '5550005518899', false),
            'TestCase2.NoName'       => array('', 'Lock', '555000559', false)
        );

    }// End ContactsDataPool.

Protected array $definition is defined to avoid data indexes being duplicated along all defined datasets. Datasets can be returned with this $definition values as indexes, we can set up this behaviour with the function setReturnIndexes(false|true), by default setted to FALSE.

Public array $dataArray will contain an array with all possible tests datasets, it can be classified by index to allow returning smaller portions of this dataArray via getRowsByIndex($index).

Tests file example:

namespace Example\tests\src;

class exampleContactsModelTest extends \PHPUnit_Framework_TestCase {

    static private $dataPool = null;

    /**
     * Static instance of ContactsDataPool
     *
     * @return \Example\tests\files\ContactsDataPool
     */
    public function getDataPool() {
        // If not instanciated yet...
        if (is_object(self::$dataPool) === false) {
            self::$dataPool = new \Example\tests\files\ContactsDataPool();
        }
        // Avoid mixing behaviors during tests
        self::$dataPool->setReturnArray(false);
        self::$dataPool->setReturnIndexes(false);

        return self::$dataPool;
    }

Function getDataPool() is a dataprovider which sets and returns an iterable object. It can be used in any common case as standard @dataprovider function's return, it's configured to avoid any index usage as a usual PHPUnit dataprovider.

We have set:

setReturnArray(false) in order to get each dataset value as a different test function parameter.

setReturnIndexes(false) to avoid returned dataset indexation with $definition values (array_combine)

    public function getDataPoolAsArray() {
        $dataPool = $this->getDataPool();
        $dataPool->setReturnArray(true);
        $dataPool->setReturnIndexes(true);

        return $dataPool->getRowsByIndex('Case');
    }

Function getDataPoolAsArray() returns an iterable dataset from previously instanced dataProvider object. We want to get only test cases indexed by "Case" so we must return the result array from getRowsByIndex('Case') function.

We have changed:

setReturnArray(true) in order to get each dataset fields encapsulated in an array.

setReturnIndexes(true) to force the indexation of each returned dataset with $definition values (array_combine)

    /**
     * @dataProvider getDataPoolAsArray
     */
    public function testArrayDataProviderInsert($regData) {
        $contModel = new \Example\src\exampleContactsModel();
        $expected  = $regData['result'];
        unset($regData['result']);

        $result = $contModel->insert($regData);
        if ($result === false) {
            $this->assertEquals($expected, $result);
        } else {
            $this->assertTrue(is_integer($result));
        }
    }

As in testArrayDataProviderInsert, with data encapsulated as array we can easily perform tests on ORM objects or avoid large parameters lists in tests with many data values.

    /**
     * @dataProvider getDataPool
     */
    public function testPureDataProviderInsert($name, $surname, $phone, $expected) {
        $contModel      = new \Example\src\exampleContactsModel();

        $reg['name']    = $name;
        $reg['surname'] = $surname;
        $reg['phone']   = $phone;

        $result = $contModel->insert($reg);
        if ($result === false) {
            $this->assertEquals($expected, $result);
        } else {
            $this->assertTrue(is_integer($result));
        }
    }

}// End exampleContactsModelTest.

Function testPureDataProviderInsert makes assertions using ContactsDataPool object as a usual dataprovider array.