Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php  | 
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| 18 | class AppControllerTest extends RestTestCase  | 
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| 19 | { | 
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| 20 | /**  | 
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| 21 | * @const complete content type string expected on a resouce  | 
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| 22 | */  | 
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| 23 | const CONTENT_TYPE = 'application/json; charset=UTF-8; profile=http://localhost/schema/core/app/item';  | 
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| 24 | |||
| 25 | /**  | 
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| 26 | * @const corresponding vendorized schema mime type  | 
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| 27 | */  | 
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| 28 | const COLLECTION_TYPE = 'application/json; charset=UTF-8; profile=http://localhost/schema/core/app/collection';  | 
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| 29 | |||
| 30 | /**  | 
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| 31 | * setup client and load fixtures  | 
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| 32 | *  | 
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| 33 | * @return void  | 
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| 34 | */  | 
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| 35 | public function setUp()  | 
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| 36 |     { | 
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| 37 | $this->loadFixtures(  | 
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| 38 | array(  | 
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| 39 | 'Graviton\CoreBundle\DataFixtures\MongoDB\LoadAppData',  | 
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| 40 | 'Graviton\I18nBundle\DataFixtures\MongoDB\LoadLanguageData',  | 
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| 41 | 'Graviton\I18nBundle\DataFixtures\MongoDB\LoadMultiLanguageData',  | 
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| 42 | 'Graviton\I18nBundle\DataFixtures\MongoDB\LoadTranslatableData',  | 
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| 43 | 'Graviton\I18nBundle\DataFixtures\MongoDB\LoadTranslatablesApp'  | 
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| 44 | ),  | 
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| 45 | null,  | 
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| 46 | 'doctrine_mongodb'  | 
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| 47 | );  | 
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| 48 | }  | 
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| 49 | /**  | 
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| 50 | * check if all fixtures are returned on GET  | 
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| 51 | *  | 
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| 52 | * @return void  | 
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| 53 | */  | 
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| 54 | public function testFindAll()  | 
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| 55 |     { | 
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| 56 | $client = static::createRestClient();  | 
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| 57 |         $client->request('GET', '/core/app/'); | 
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| 58 | |||
| 59 | $response = $client->getResponse();  | 
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| 60 | $results = $client->getResults();  | 
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| 61 | |||
| 62 | $this->assertResponseContentType(self::COLLECTION_TYPE, $response);  | 
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| 63 | $this->assertEquals(2, count($results));  | 
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| 64 | |||
| 65 |         $this->assertEquals('admin', $results[0]->id); | 
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| 66 |         $this->assertEquals('Administration', $results[0]->name->en); | 
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| 67 | $this->assertEquals(true, $results[0]->showInMenu);  | 
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| 68 | $this->assertEquals(2, $results[0]->order);  | 
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| 69 | |||
| 70 |         $this->assertEquals('tablet', $results[1]->id); | 
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| 71 |         $this->assertEquals('Tablet', $results[1]->name->en); | 
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| 72 | $this->assertEquals(true, $results[1]->showInMenu);  | 
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| 73 | $this->assertEquals(1, $results[1]->order);  | 
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| 74 | |||
| 75 | $this->assertContains(  | 
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| 76 | '<http://localhost/core/app/>; rel="self"',  | 
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| 77 |             $response->headers->get('Link') | 
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| 78 | );  | 
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| 79 |         $this->assertEquals('*', $response->headers->get('Access-Control-Allow-Origin')); | 
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| 80 | }  | 
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| 81 | |||
| 82 | /**  | 
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| 83 | * test if we can get list of apps, paged and with filters..  | 
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| 84 | *  | 
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| 85 | * @return void  | 
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| 86 | */  | 
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| 87 | public function testGetAppWithFilteringAndPaging()  | 
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| 88 |     { | 
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| 89 | $client = static::createRestClient();  | 
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| 90 | $_SERVER['QUERY_STRING'] = 'eq(showInMenu,true)&limit(1)';  | 
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| 91 |         $client->request('GET', '/core/app/?eq(showInMenu,true)&limit(1)'); | 
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| 92 | unset($_SERVER['QUERY_STRING']);  | 
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| 93 | $response = $client->getResponse();  | 
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| 94 | |||
| 95 | $this->assertEquals(1, count($client->getResults()));  | 
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| 96 | |||
| 97 | $this->assertContains(  | 
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| 98 | '<http://localhost/core/app/?eq(showInMenu%2Ctrue)&limit(1)>; rel="self"',  | 
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| 99 |             $response->headers->get('Link') | 
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| 100 | );  | 
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| 101 | |||
| 102 | $this->assertContains(  | 
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| 103 | '<http://localhost/core/app/?eq(showInMenu%2Ctrue)&limit(1%2C1)>; rel="next"',  | 
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| 104 |             $response->headers->get('Link') | 
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| 105 | );  | 
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| 106 | |||
| 107 | $this->assertContains(  | 
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| 108 | '<http://localhost/core/app/?eq(showInMenu%2Ctrue)&limit(1%2C1)>; rel="last"',  | 
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| 109 |             $response->headers->get('Link') | 
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| 110 | );  | 
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| 111 | |||
| 112 | }  | 
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| 113 | |||
| 114 | /**  | 
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| 115 | * rql limit() should *never* be overwritten by default value  | 
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| 116 | *  | 
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| 117 | * @return void  | 
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| 118 | */  | 
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| 119 | public function testGetAppPagingWithRql()  | 
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| 120 |     { | 
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| 121 | // does limit work?  | 
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| 122 | $client = static::createRestClient();  | 
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| 123 |         $client->request('GET', '/core/app/?limit(1)'); | 
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| 124 | $this->assertEquals(1, count($client->getResults()));  | 
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| 125 | |||
| 126 | $response = $client->getResponse();  | 
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| 127 | |||
| 128 | $this->assertContains(  | 
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| 129 | '<http://localhost/core/app/?limit(1)>; rel="self"',  | 
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| 130 |             $response->headers->get('Link') | 
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| 131 | );  | 
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| 132 | |||
| 133 | $this->assertContains(  | 
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| 134 | '<http://localhost/core/app/?limit(1%2C1)>; rel="next"',  | 
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| 135 |             $response->headers->get('Link') | 
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| 136 | );  | 
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| 137 | |||
| 138 | $this->assertContains(  | 
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| 139 | '<http://localhost/core/app/?limit(1%2C1)>; rel="last"',  | 
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| 140 |             $response->headers->get('Link') | 
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| 141 | );  | 
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| 142 | |||
| 143 |         $this->assertSame('2', $response->headers->get('X-Total-Count')); | 
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| 144 | |||
| 145 | /*** pagination tests **/  | 
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| 146 | $client = static::createRestClient();  | 
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| 147 |         $client->request('GET', '/core/app/?limit(1,1)'); | 
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| 148 | $this->assertEquals(1, count($client->getResults()));  | 
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| 149 | |||
| 150 | $response = $client->getResponse();  | 
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| 151 | |||
| 152 | $this->assertContains(  | 
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| 153 | '<http://localhost/core/app/?limit(1%2C1)>; rel="self"',  | 
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| 154 |             $response->headers->get('Link') | 
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| 155 | );  | 
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| 156 | |||
| 157 | $this->assertContains(  | 
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| 158 | '<http://localhost/core/app/?limit(1%2C0)>; rel="prev"',  | 
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| 159 |             $response->headers->get('Link') | 
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| 160 | );  | 
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| 161 | |||
| 162 | // we're on the 'last' page - so 'last' should not be in in Link header  | 
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| 163 | $this->assertNotContains(  | 
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| 164 | 'rel="last"',  | 
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| 165 |             $response->headers->get('Link') | 
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| 166 | );  | 
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| 167 | |||
| 168 |         $this->assertSame('2', $response->headers->get('X-Total-Count')); | 
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| 169 | }  | 
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| 170 | |||
| 171 | /**  | 
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| 172 | * check for a client error if invalid limit value is provided  | 
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| 173 | *  | 
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| 174 | * @dataProvider invalidPagingPageSizeProvider  | 
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| 175 | *  | 
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| 176 | * @param integer $limit limit value that should fail  | 
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| 177 | * @return void  | 
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| 178 | */  | 
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| 179 | public function testInvalidPagingPageSize($limit)  | 
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| 180 |     { | 
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| 181 | $client = static::createRestClient();  | 
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| 182 |         $client->request('GET', sprintf('/core/app/?limit(%s)', $limit)); | 
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| 183 | |||
| 184 | $this->assertEquals(Response::HTTP_BAD_REQUEST, $client->getResponse()->getStatusCode());  | 
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| 185 |         $this->assertContains('negative or null limit in rql', $client->getResults()->message); | 
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| 186 | }  | 
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| 187 | |||
| 188 | /**  | 
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| 189 | * page size test provides  | 
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| 190 | *  | 
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| 191 | * @return array[]  | 
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                         | 
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| 192 | */  | 
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| 193 | public function invalidPagingPageSizeProvider()  | 
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| 194 |     { | 
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| 195 | return [  | 
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| 196 | [0],  | 
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| 197 | [-1],  | 
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| 198 | ];  | 
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| 199 | }  | 
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| 200 | |||
| 201 | /**  | 
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| 202 | * RQL is parsed only when we get apps  | 
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| 203 | *  | 
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| 204 | * @return void  | 
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| 205 | */  | 
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| 206 | public function testRqlIsParsedOnlyOnGetRequest()  | 
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| 257 | |||
| 258 | /**  | 
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| 259 | * Test only RQL select() operator is allowed for GET one  | 
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| 260 | *  | 
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| 261 | * @return void  | 
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| 262 | * @group tmp  | 
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| 263 | */  | 
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| 264 | public function testOnlyRqlSelectIsAllowedOnGetOne()  | 
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| 292 | |||
| 293 | /**  | 
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| 294 | * check for empty collections when no fixtures are loaded  | 
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| 295 | *  | 
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| 296 | * @return void  | 
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| 297 | */  | 
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| 298 | View Code Duplication | public function testFindAllEmptyCollection()  | 
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| 312 | |||
| 313 | /**  | 
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| 314 | * test if we can get an app by id  | 
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| 315 | *  | 
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| 316 | * @return void  | 
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| 317 | */  | 
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| 318 | public function testGetApp()  | 
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| 337 | |||
| 338 | /**  | 
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| 339 | * test if we can create an app through POST  | 
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| 340 | *  | 
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| 341 | * @return void  | 
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| 342 | */  | 
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| 343 | public function testPostApp()  | 
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| 372 | |||
| 373 | /**  | 
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| 374 | * test if we get a correct return if we post empty.  | 
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| 375 | *  | 
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| 376 | * @return void  | 
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| 377 | */  | 
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| 378 | public function testPostEmptyApp()  | 
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| 394 | |||
| 395 | /**  | 
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| 396 | * test if we get a correct return if we post empty.  | 
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| 397 | *  | 
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| 398 | * @return void  | 
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| 399 | */  | 
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| 400 | public function testPostNonObjectApp()  | 
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| 409 | |||
| 410 | /**  | 
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| 411 | * test if 500 error is reported when posting an malformed input  | 
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| 412 | *  | 
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| 413 | * @return void  | 
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| 414 | */  | 
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| 415 | public function testPostMalformedApp()  | 
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| 444 | |||
| 445 | /**  | 
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| 446 | * Tests if an error is returned when an id is send in a post  | 
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| 447 | *  | 
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| 448 | * @return void  | 
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| 449 | */  | 
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| 450 | public function testPostWithId()  | 
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| 464 | /**  | 
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| 465 | * test updating apps  | 
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| 466 | *  | 
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| 467 | * @return void  | 
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| 468 | */  | 
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| 469 | public function testPutApp()  | 
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| 497 | |||
| 498 | /**  | 
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| 499 | * Test for PATCH Request  | 
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| 500 | *  | 
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| 501 | * @return void  | 
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| 502 | */  | 
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| 503 | public function testPatchAppRequestApplyChanges()  | 
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| 540 | |||
| 541 | /**  | 
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| 542 | * Test for Malformed PATCH Request  | 
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| 543 | *  | 
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| 544 | * @return void  | 
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| 545 | */  | 
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| 546 | public function testMalformedPatchAppRequest()  | 
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| 575 | |||
| 576 | /**  | 
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| 577 | * Try to update an app with a non matching ID in GET and req body  | 
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| 578 | *  | 
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| 579 | * @return void  | 
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| 580 | */  | 
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| 581 | public function testNonMatchingIdPutApp()  | 
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| 601 | |||
| 602 | /**  | 
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| 603 | * We had an issue when PUTing without ID would create a new record.  | 
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| 604 | * This test ensures that we don't do that, instead we should apply the ID from the GET req.  | 
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| 605 | *  | 
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| 606 | * @return void  | 
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| 607 | */  | 
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| 608 | public function testPutAppNoIdInPayload()  | 
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| 629 | |||
| 630 | /**  | 
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| 631 | * test updating an inexistant document (upsert)  | 
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| 632 | *  | 
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| 633 | * @return void  | 
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| 634 | */  | 
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| 635 | public function testUpsertApp()  | 
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| 648 | |||
| 649 | /**  | 
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| 650 | * test deleting an app  | 
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| 651 | *  | 
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| 652 | * @return void  | 
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| 653 | */  | 
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| 654 | public function testDeleteApp()  | 
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| 674 | |||
| 675 | /**  | 
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| 676 | * test failing validation on boolean field  | 
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| 677 | *  | 
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| 678 | * @return void  | 
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| 679 | */  | 
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| 680 | public function testFailingBooleanValidationOnAppUpdate()  | 
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| 698 | |||
| 699 | /**  | 
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| 700 | * test getting schema information  | 
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| 701 | *  | 
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| 702 | * @return void  | 
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| 703 | */  | 
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| 704 | View Code Duplication | public function testGetAppSchemaInformation()  | 
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| 713 | |||
| 714 | /**  | 
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| 715 | * requests on OPTIONS and HEAD shall not lead graviton to get any data from mongodb.  | 
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| 716 | * if we page limit(1) this will lead to presence of the x-total-count header if  | 
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| 717 | * data is generated (asserted by testGetAppPagingWithRql()). thus, if we don't  | 
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| 718 | * have this header, we can safely assume that no data has been processed in RestController.  | 
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| 719 | *  | 
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| 720 | * @return void  | 
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| 721 | */  | 
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| 722 | View Code Duplication | public function testNoRecordsAreGeneratedOnPreRequests()  | 
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| 734 | |||
| 735 | /**  | 
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| 736 | * test getting schema information from canonical url  | 
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| 737 | *  | 
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| 738 | * @return void  | 
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| 739 | */  | 
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| 740 | View Code Duplication | public function testGetAppSchemaInformationCanonical()  | 
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| 748 | |||
| 749 | /**  | 
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| 750 | * test getting collection schema  | 
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| 751 | *  | 
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| 752 | * @return void  | 
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| 753 | */  | 
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| 754 | public function testGetAppCollectionSchemaInformation()  | 
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| 782 | |||
| 783 | /**  | 
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| 784 | * Test for searchable translations  | 
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| 785 | *  | 
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| 786 | * @dataProvider searchableTranslationDataProvider  | 
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| 787 | *  | 
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| 788 | * @param string $expr expression  | 
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| 789 | * @param int $expCount count  | 
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| 790 | *  | 
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| 791 | * @return void  | 
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| 792 | */  | 
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| 793 | public function testSearchableTranslations($expr, $expCount)  | 
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| 807 | |||
| 808 | /**  | 
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| 809 | * data provider for searchable translations  | 
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| 810 | *  | 
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| 811 | * @return array data  | 
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| 812 | */  | 
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| 813 | public function searchableTranslationDataProvider()  | 
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| 824 | |||
| 825 | /**  | 
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| 826 | * ensure we have nice parse error output in rql parse failure  | 
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| 827 | *  | 
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| 828 | * @return void  | 
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| 829 | */  | 
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| 830 | View Code Duplication | public function testRqlSyntaxError()  | 
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| 844 | |||
| 845 | /**  | 
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| 846 | * check if response looks like schema  | 
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| 847 | *  | 
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| 848 | * @param object $response response  | 
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| 849 | *  | 
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| 850 | * @return void  | 
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| 851 | */  | 
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| 852 | private function assertIsSchemaResponse($response)  | 
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| 857 | |||
| 858 | /**  | 
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| 859 | * check if a schema is of the app type  | 
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| 860 | *  | 
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| 861 | * @param \stdClass $schema schema from service to validate  | 
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| 862 | *  | 
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| 863 | * @return void  | 
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| 864 | */  | 
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| 865 | private function assertIsAppSchema(\stdClass $schema)  | 
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| 890 | }  | 
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| 891 | 
This check looks for the generic type
arrayas a return type and suggests a more specific type. This type is inferred from the actual code.