.gitignore

 .idea
 /vendor/
+/bin/.phpunit

Filter/AbstractFilter.php

@@ -15,6 +15,11 @@ abstract class AbstractFilter
      */
     protected $value;
 
+    /**
+     * @var string|null
+     */
+    protected $originalValue;
+
     /**
      * @var bool
      */
@@ -36,7 +41,7 @@ abstract class AbstractFilter
      */
     public function getValue(): ?string
     {
-        return trim($this->value);
+        return $this->value;
     }
 
     /**
@@ -44,7 +49,11 @@ abstract class AbstractFilter
      */
     public function setValue(string $value): void
     {
-        $this->value = $value;
+        $this->originalValue = $value;
+
+        if (strlen(trim($value)) > 0) {
+            $this->value = trim($value);
+        }
     }
 
     /**
@@ -55,6 +64,14 @@ abstract class AbstractFilter
         return !empty($this->getValue());
     }
 
+    /**
+     * @return string|null
+     */
+    public function getOriginalValue(): ?string
+    {
+        return $this->originalValue;
+    }
+
     /**
      * @return void
      */

Tests/Filter/AbstractFilterTest.php

+<?php
+
+namespace QueryFilter\Tests\Filter;
+
+use PHPUnit\Framework\TestCase;
+use QueryFilter\Filter\AbstractFilter;
+
+/**
+ * Class AbstractFilterTest
+ * @package QueryFilter\Tests\Filter
+ */
+class AbstractFilterTest extends TestCase
+{
+    /**
+     * @var AbstractFilter
+     */
+    private $filter;
+
+    public function setUp()
+    {
+        $this->filter = $this->getMockForAbstractClass(AbstractFilter::class);
+        $this->filter->expects($this->any())
+            ->method('getName')
+            ->will($this->returnValue('test'));
+    }
+
+    public function testSetValueMethodWithCorrectValue()
+    {
+        $this->filter->setValue(' value ');
+
+        $this->assertEquals('value', $this->filter->getValue());
+        $this->assertEquals(' value ', $this->filter->getOriginalValue());
+        $this->assertTrue($this->filter->hasValue());
+    }
+
+    public function testSetValueMethodWithIncorrectValue()
+    {
+        $this->filter->setValue('  ');
+
+        $this->assertEquals(null, $this->filter->getValue());
+        $this->assertEquals('  ', $this->filter->getOriginalValue());
+        $this->assertFalse($this->filter->hasValue());
+    }
+
+    public function testEnableMethod()
+    {
+        $this->filter->enable();
+
+        $this->assertTrue($this->filter->isEnabled());
+    }
+
+    public function testDisableMethod()
+    {
+        $this->filter->disable();
+
+        $this->assertFalse($this->filter->isEnabled());
+    }
+
+    public function testCanBeAppliedMethod()
+    {
+        $this->filter->enable();
+        $this->filter->setValue('value');
+
+        $this->assertTrue($this->filter->canBeApplied());
+    }
+}

Tests/Filter/LimitTest.php

+<?php
+
+namespace QueryFilter\Tests\Filter;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\QueryBuilder;
+use PHPUnit\Framework\TestCase;
+use QueryFilter\Filter\Limit;
+
+/**
+ * Class LimitTest
+ * @package QueryFilter\Tests\Filter
+ */
+class LimitTest extends TestCase
+{
+    /**
+     * @var Limit
+     */
+    private $filter;
+
+    /**
+     * @var EntityManager
+     */
+    private $entityManager;
+
+    public function setUp()
+    {
+        $this->entityManager  = $this->getMockBuilder(EntityManager::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->filter = new Limit();
+    }
+
+    public function testGetName()
+    {
+        $this->assertEquals('limit', $this->filter->getName());
+    }
+
+    public function testApplyFilterMethod()
+    {
+        $this->filter->setValue(5);
+        $queryBuilder = $this->getMockBuilder(QueryBuilder::class)
+            ->setMethods(['setMaxResults'])
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $queryBuilder->expects($this->once())
+            ->method('setMaxResults')
+            ->with(5)
+            ->will($this->returnValue($queryBuilder));
+
+        $this->filter->applyFilter($queryBuilder);
+    }
+}

Tests/Filter/OffsetTest.php

+<?php
+
+namespace QueryFilter\Tests\Filter;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\QueryBuilder;
+use PHPUnit\Framework\TestCase;
+use QueryFilter\Filter\Offset;
+
+/**
+ * Class OffsetTest
+ * @package QueryFilter\Tests\Filter
+ */
+class OffsetTest extends TestCase
+{
+    /**
+     * @var Offset
+     */
+    private $filter;
+
+    /**
+     * @var EntityManager
+     */
+    private $entityManager;
+
+    public function setUp()
+    {
+        $this->entityManager  = $this->getMockBuilder(EntityManager::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->filter = new Offset();
+    }
+
+    public function testGetName()
+    {
+        $this->assertEquals('offset', $this->filter->getName());
+    }
+
+    public function testApplyFilterMethod()
+    {
+        $this->filter->setValue(5);
+        $queryBuilder = $this->getMockBuilder(QueryBuilder::class)
+            ->setMethods(['setFirstResult'])
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $queryBuilder->expects($this->once())
+            ->method('setFirstResult')
+            ->with(5)
+            ->will($this->returnValue($queryBuilder));
+
+        $this->filter->applyFilter($queryBuilder);
+    }
+}

Tests/Service/QueryFilterServiceTest.php

+<?php
+
+namespace QueryFilter\Tests\Service;
+
+use PHPUnit\Framework\TestCase;
+use QueryFilter\Filter\AbstractFilter;
+use QueryFilter\Service\QueryFilterService;
+use Symfony\Component\HttpFoundation\ParameterBag;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * Class QueryFilterServiceTest
+ * @package QueryFilter\Tests\Service
+ */
+class QueryFilterServiceTest extends TestCase
+{
+    /**
+     * @var QueryFilterService
+     */
+    private $service;
+
+    /**
+     * @var AbstractFilter
+     */
+    private $filter;
+
+    public function setUp()
+    {
+        $request = $this->createMock(Request::class);
+        $request->query = $this->createMock(ParameterBag::class);
+        $request->query->expects($this->any())
+            ->method('get')
+            ->with('test')
+            ->willReturn(5);
+
+        $requestStack = $this->createMock(RequestStack::class);
+        $requestStack->expects($this->any())
+            ->method('getCurrentRequest')
+            ->willReturn($request);
+
+        $this->service = new QueryFilterService($requestStack);
+
+        $this->filter = $this->getMockForAbstractClass(AbstractFilter::class);
+        $this->filter->expects($this->any())
+            ->method('getName')
+            ->willReturn('test');
+
+        $this->service->registerFilter($this->filter);
+    }
+
+    public function testGetFilterMethodWithCorrectValue()
+    {
+        $this->assertTrue($this->service->hasFilter('test'));
+        $this->assertEquals('test', $this->service->getFilter('test')->getName());
+        $this->assertEquals(5, $this->service->getFilter('test')->getValue());
+    }
+
+    public function testGetFilterMethodWithIncorrectValue()
+    {
+        $this->assertFalse($this->service->hasFilter('testInvalid'));
+        $this->assertEquals(null, $this->service->getFilter('testInvalid'));
+    }
+
+    public function testEnableFilterMethod()
+    {
+        $this->service->enableFilter('test');
+        $this->assertTrue($this->service->getFilter('test')->isEnabled());
+    }
+
+    public function testDisableFilterMethod()
+    {
+        $this->service->disableFilter('test');
+        $this->assertFalse($this->service->getFilter('test')->isEnabled());
+    }
+}

bin/phpunit

+#!/usr/bin/env php
+<?php
+
+if (!file_exists(dirname(__DIR__) . '/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
+    echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\n";
+    exit(1);
+}
+
+$classLoader = require dirname(__DIR__) . '/vendor/autoload.php';
+
+if (false === getenv('SYMFONY_PHPUNIT_REMOVE')) {
+    putenv('SYMFONY_PHPUNIT_REMOVE=');
+}
+if (false === getenv('SYMFONY_PHPUNIT_DIR')) {
+    putenv('SYMFONY_PHPUNIT_DIR=' . __DIR__ . '/.phpunit');
+}
+
+require dirname(__DIR__) . '/vendor/symfony/phpunit-bridge/bin/simple-phpunit';

composer.json

@@ -16,14 +16,21 @@
         "symfony/orm-pack": "^1.0",
         "symfony/yaml": "^3.4|^4.0"
     },
+    "require-dev": {
+        "symfony/phpunit-bridge": "^4.1"
+    },
+    "config": {
+        "preferred-install": {
+            "*": "dist"
+        },
+        "sort-packages": true
+    },
     "autoload": {
         "psr-4": {
             "QueryFilter\\": ""
-        }
-    },
-    "autoload-dev": {
-        "psr-4": {
-            "QueryFilter\\Tests\\": "tests/"
-        }
+        },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     }
 }

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "a9d16274ac169337015d4f83ebfc0bcd",
+    "content-hash": "6db895101d76c75b9b2691bc2682e1f6",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -2874,7 +2874,74 @@
             "time": "2018-10-24T07:43:44+00:00"
         }
     ],
-    "packages-dev": [],
+    "packages-dev": [
+        {
+            "name": "symfony/phpunit-bridge",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/phpunit-bridge.git",
+                "reference": "6edaae18c553f7d6c6aeb8babf6bf2633cc2902a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/6edaae18c553f7d6c6aeb8babf6bf2633cc2902a",
+                "reference": "6edaae18c553f7d6c6aeb8babf6bf2633cc2902a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "conflict": {
+                "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"
+            },
+            "suggest": {
+                "ext-zip": "Zip support is required when using bin/simple-phpunit",
+                "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader"
+            },
+            "bin": [
+                "bin/simple-phpunit"
+            ],
+            "type": "symfony-bridge",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.2-dev"
+                },
+                "thanks": {
+                    "name": "phpunit/phpunit",
+                    "url": "https://github.com/sebastianbergmann/phpunit"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Bridge\\PhpUnit\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony PHPUnit Bridge",
+            "homepage": "https://symfony.com",
+            "time": "2018-11-11T19:52:12+00:00"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "dev",
     "stability-flags": [],

phpunit.xml.dist

+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/6.5/phpunit.xsd"
+         backupGlobals="false"
+         colors="true"
+         bootstrap="vendor/autoload.php"
+         failOnRisky="true"
+         failOnWarning="true"
+>
+    <php>
+        <ini name="error_reporting" value="-1" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Query Filter Test Suite">
+            <directory>./Tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>./</directory>
+            <exclude>
+                <directory>./Tests</directory>
+                <directory>./vendor</directory>
+                <directory>./bin</directory>
+            </exclude>
+        </whitelist>
+    </filter>
+</phpunit>