<?php
namespace Stichoza\GoogleTranslate\Tests;

use Stichoza\GoogleTranslate\TranslateClient;

class TranslationTest extends \PHPUnit_Framework_TestCase
{
    public function setUp()
    {
        $this->tr = new TranslateClient();
    }

    public function testTranslationEquality()
    {
        $resultOne = TranslateClient::translate('en', 'ka', 'Hello');
        $resultTwo = $this->tr->setSource('en')->setTarget('ka')->translate('Hello');

        $this->assertEquals($resultOne, $resultTwo, 'გამარჯობა');
    }

    public function testArrayTranslation()
    {
        $this->tr->setSource('en')->setTarget('ka');

        $resultCat  = $this->tr->translate('cat');
        $resultDog  = $this->tr->translate('dog');
        $resultFish = $this->tr->translate('fish');

        $arrayResults = $this->tr->translate(['cat', 'dog', 'fish']);
        $arrayZesults = TranslateClient::translate('en', 'ka', ['cat', 'dog', 'fish']);

        $this->assertEquals($resultCat,  $arrayResults[0], 'კატა');
        $this->assertEquals($resultDog,  $arrayResults[1], 'ძაღლი');
        $this->assertEquals($resultFish, $arrayResults[2], 'თევზი');

        $this->assertEquals($resultCat,  $arrayZesults[0], 'კატა');
        $this->assertEquals($resultDog,  $arrayZesults[1], 'ძაღლი');
        $this->assertEquals($resultFish, $arrayZesults[2], 'თევზი');
    }
}

<?php
namespace Stichoza\GoogleTranslate\Tests;

use Stichoza\GoogleTranslate\TranslateClient;

class TranslationTest extends \PHPUnit_Framework_TestCase
{
    public function setUp()
    {
        $this->tr = new TranslateClient();
    }

    public function testTranslationEquality()
    {
        $resultOne = TranslateClient::translate('en', 'ka', 'Hello');
        $resultTwo = $this->tr->setSource('en')->setTarget('ka')->translate('Hello');

        $this->assertEquals($resultOne, $resultTwo, 'გამარჯობა');
    }

    public function testArrayTranslation()
    {
        $this->tr->setSource('en')->setTarget('ka');

        $resultCat  = $this->tr->translate('cat');
        $resultDog  = $this->tr->translate('dog');
        $resultFish = $this->tr->translate('fish');

        $arrayResults = $this->tr->translate(['cat', 'dog', 'fish']);

        $this->assertEquals($resultCat,  $arrayResults[0], 'კატა');
        $this->assertEquals($resultDog,  $arrayResults[1], 'ძაღლი');
        $this->assertEquals($resultFish, $arrayResults[2], 'თევზი');
    }
}

--- 
+++ 
@@ -27,9 +27,14 @@
         $resultFish = $this->tr->translate('fish');
 
         $arrayResults = $this->tr->translate(['cat', 'dog', 'fish']);
+        $arrayZesults = TranslateClient::translate('en', 'ka', ['cat', 'dog', 'fish']);
 
         $this->assertEquals($resultCat,  $arrayResults[0], 'კატა');
         $this->assertEquals($resultDog,  $arrayResults[1], 'ძაღლი');
         $this->assertEquals($resultFish, $arrayResults[2], 'თევზი');
+
+        $this->assertEquals($resultCat,  $arrayZesults[0], 'კატა');
+        $this->assertEquals($resultDog,  $arrayZesults[1], 'ძაღლი');
+        $this->assertEquals($resultFish, $arrayZesults[2], 'თევზი');
     }
 }
Add array translation test for static call
