Added missing tests for Common module

module/Common/test/Twig/Extension/TranslatorExtensionTest.php

@@ -0,0 +1,70 @@
+<?php
+namespace ShlinkioTest\Shlink\Common\Twig\Extension;
+
+use PHPUnit_Framework_TestCase as TestCase;
+use Prophecy\Argument;
+use Prophecy\Prophecy\ObjectProphecy;
+use Shlinkio\Shlink\Common\Twig\Extension\TranslatorExtension;
+use Zend\I18n\Translator\Translator;
+
+class TranslatorExtensionTest extends TestCase
+{
+    /**
+     * @var TranslatorExtension
+     */
+    protected $extension;
+    /**
+     * @var ObjectProphecy
+     */
+    protected $translator;
+
+    public function setUp()
+    {
+        $this->translator = $this->prophesize(Translator::class);
+        $this->extension = new TranslatorExtension($this->translator->reveal());
+    }
+
+    /**
+     * @test
+     */
+    public function extensionNameIsClassName()
+    {
+        $this->assertEquals(TranslatorExtension::class, $this->extension->getName());
+    }
+
+    /**
+     * @test
+     */
+    public function properFunctionsAreReturned()
+    {
+        $funcs = $this->extension->getFunctions();
+        $this->assertCount(2, $funcs);
+        foreach ($funcs as $func) {
+            $this->assertInstanceOf(\Twig_SimpleFunction::class, $func);
+        }
+    }
+
+    /**
+     * @test
+     */
+    public function translateFallbacksToTranslator()
+    {
+        $this->translator->translate('foo', 'default', null)->shouldBeCalledTimes(1);
+        $this->extension->translate('foo');
+
+        $this->translator->translate('bar', 'baz', 'en')->shouldBeCalledTimes(1);
+        $this->extension->translate('bar', 'baz', 'en');
+    }
+
+    /**
+     * @test
+     */
+    public function translatePluralFallbacksToTranslator()
+    {
+        $this->translator->translatePlural('foo', 'bar', 'baz', 'default', null)->shouldBeCalledTimes(1);
+        $this->extension->translatePlural('foo', 'bar', 'baz');
+
+        $this->translator->translatePlural('foo', 'bar', 'baz', 'another', 'en')->shouldBeCalledTimes(1);
+        $this->extension->translatePlural('foo', 'bar', 'baz', 'another', 'en');
+    }
+}