Complex classes like JsonSerializerTest often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use JsonSerializerTest, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | class JsonSerializerTest extends \PHPUnit_Framework_TestCase |
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| 10 | { |
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| 11 | |||
| 12 | /** |
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| 13 | * Serializer instance |
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| 14 | * |
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| 15 | * @var JsonSerializer |
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| 16 | */ |
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| 17 | protected $serializer; |
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| 18 | |||
| 19 | /** |
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| 20 | * Test case setup |
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| 21 | * |
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| 22 | * @return void |
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| 23 | */ |
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| 24 | public function setUp() |
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| 25 | { |
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| 26 | parent::setUp(); |
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| 27 | $customObjectSerializerMap['Zumba\\JsonSerializer\\Test\\SupportClasses\\MyType'] = new \Zumba\JsonSerializer\Test\SupportClasses\MyTypeSerializer(); |
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| 28 | $this->serializer = new JsonSerializer(null, $customObjectSerializerMap); |
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| 29 | } |
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| 30 | |||
| 31 | /** |
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| 32 | * Test serialization of scalar values |
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| 33 | * |
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| 34 | * @dataProvider scalarData |
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| 35 | * @param mixed $scalar |
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| 36 | * @param string $jsoned |
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| 37 | * @return void |
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| 38 | */ |
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| 39 | public function testSerializeScalar($scalar, $jsoned) |
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| 43 | |||
| 44 | /** |
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| 45 | * Test serialization of float values with locale |
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| 46 | * |
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| 47 | * @return void |
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| 48 | */ |
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| 49 | public function testSerializeFloatLocalized() |
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| 50 | { |
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| 51 | $possibleLocales = ['fr_FR', 'fr_FR.utf8', 'fr', 'fra', 'French']; |
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| 52 | $originalLocale = setlocale(LC_NUMERIC, 0); |
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| 53 | if (!setlocale(LC_NUMERIC, $possibleLocales)) { |
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| 54 | $this->markTestSkipped('Unable to set an i18n locale.'); |
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| 55 | } |
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| 56 | |||
| 57 | $data = [1.0, 1.1, 0.00000000001, 1.999999999999, 223423.123456789, 1e5, 1e11]; |
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| 58 | $expected = version_compare(PHP_VERSION, '7.1', '>=') ? |
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| 59 | '[1.0,1.1,1.0e-11,1.999999999999,223423.123456789,100000.0,100000000000.0]' : |
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| 60 | '[1.0,1.1,1.0e-11,1.999999999999,223423.12345679,100000.0,100000000000.0]'; |
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| 61 | $this->assertSame($expected, $this->serializer->serialize($data)); |
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| 62 | |||
| 63 | setlocale(LC_NUMERIC, $originalLocale); |
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| 64 | } |
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| 65 | /** |
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| 66 | * Test unserialization of scalar values |
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| 67 | * |
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| 68 | * @dataProvider scalarData |
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| 69 | * @param mixed $scalar |
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| 70 | * @param string $jsoned |
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| 71 | * @return void |
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| 72 | */ |
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| 73 | public function testUnserializeScalar($scalar, $jsoned) |
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| 77 | |||
| 78 | /** |
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| 79 | * List of scalar data |
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| 80 | * |
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| 81 | * @return array |
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| 82 | */ |
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| 83 | public function scalarData() |
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| 100 | |||
| 101 | /** |
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| 102 | * Test the serialization of resources |
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| 103 | * |
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| 104 | * @return void |
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| 105 | */ |
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| 106 | public function testSerializeResource() |
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| 111 | |||
| 112 | /** |
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| 113 | * Test the serialization of closures when not providing closure serializer |
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| 114 | * |
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| 115 | * @return void |
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| 116 | */ |
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| 117 | public function testSerializeClosureWithoutSerializer() |
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| 126 | |||
| 127 | /** |
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| 128 | * Test serialization of array without objects |
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| 129 | * |
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| 130 | * @dataProvider arrayNoObjectData |
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| 131 | * @param array $array |
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| 132 | * @param string $jsoned |
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| 133 | * @return void |
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| 134 | */ |
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| 135 | public function testSerializeArrayNoObject($array, $jsoned) |
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| 139 | |||
| 140 | /** |
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| 141 | * Test unserialization of array without objects |
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| 142 | * |
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| 143 | * @dataProvider arrayNoObjectData |
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| 144 | * @param array $array |
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| 145 | * @param string $jsoned |
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| 146 | * @return void |
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| 147 | */ |
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| 148 | public function testUnserializeArrayNoObject($array, $jsoned) |
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| 152 | |||
| 153 | /** |
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| 154 | * List of array data |
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| 155 | * |
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| 156 | * @return array |
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| 157 | */ |
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| 158 | public function arrayNoObjectData() |
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| 171 | |||
| 172 | /** |
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| 173 | * Test serialization of objects |
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| 174 | * |
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| 175 | * @return void |
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| 176 | */ |
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| 177 | public function testSerializeObject() |
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| 207 | |||
| 208 | /** |
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| 209 | * Test unserialization of objects |
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| 210 | * |
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| 211 | * @return void |
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| 212 | */ |
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| 213 | public function testUnserializeObjects() |
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| 235 | |||
| 236 | |||
| 237 | /** |
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| 238 | * Test serialization of objects using the custom serializers |
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| 239 | * |
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| 240 | * @return void |
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| 241 | */ |
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| 242 | public function testCustomObjectSerializer() |
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| 249 | |||
| 250 | /** |
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| 251 | * Test unserialization of objects using the custom serializers |
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| 252 | * |
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| 253 | * @return void |
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| 254 | */ |
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| 255 | public function testCustomObjectsUnserializer() |
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| 263 | |||
| 264 | /** |
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| 265 | * Test magic serialization methods |
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| 266 | * |
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| 267 | * @return void |
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| 268 | */ |
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| 269 | public function testSerializationMagicMethods() |
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| 279 | |||
| 280 | /** |
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| 281 | * Test serialization of DateTime classes |
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| 282 | * |
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| 283 | * Some interal classes, such as DateTime, cannot be initialized with |
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| 284 | * ReflectionClass::newInstanceWithoutConstructor() |
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| 285 | * |
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| 286 | * @return void |
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| 287 | */ |
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| 288 | public function testSerializationOfDateTime() |
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| 294 | |||
| 295 | /** |
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| 296 | * Test the serialization of closures providing closure serializer |
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| 297 | * |
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| 298 | * @return void |
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| 299 | */ |
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| 300 | public function testSerializationOfClosure() |
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| 323 | |||
| 324 | /** |
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| 325 | * Test the unserialization of closures without providing closure serializer |
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| 326 | * |
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| 327 | * @return void |
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| 328 | */ |
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| 329 | public function testUnserializeOfClosureWithoutSerializer() |
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| 349 | |||
| 350 | /** |
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| 351 | * Test unserialize of unknown class |
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| 352 | * |
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| 353 | * @return void |
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| 354 | */ |
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| 355 | public function testUnserializeUnknownClass() |
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| 361 | |||
| 362 | /** |
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| 363 | * Test serialization of undeclared properties |
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| 364 | * |
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| 365 | * @return void |
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| 366 | */ |
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| 367 | public function testSerializationUndeclaredProperties() |
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| 385 | |||
| 386 | /** |
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| 387 | * Test undeclared properties setter (valid) |
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| 388 | * |
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| 389 | * @return void |
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| 390 | */ |
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| 391 | public function testSetUnserializeUndeclaredPropertyModeValid() |
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| 396 | |||
| 397 | /** |
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| 398 | * Test undeclared properties setter (invalid) |
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| 399 | * |
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| 400 | * @return void |
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| 401 | */ |
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| 402 | public function testSetUnserializeUndeclaredPropertyModeInvalid() |
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| 407 | |||
| 408 | /** |
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| 409 | * Test unserialization of undeclared properties in SET mode |
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| 410 | * |
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| 411 | * @return void |
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| 412 | */ |
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| 413 | public function testUnserializeUndeclaredPropertySet() |
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| 422 | |||
| 423 | /** |
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| 424 | * Test unserialization of undeclared properties in IGNORE mode |
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| 425 | * |
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| 426 | * @return void |
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| 427 | */ |
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| 428 | public function testUnserializeUndeclaredPropertyIgnore() |
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| 436 | |||
| 437 | /** |
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| 438 | * Test unserialization of undeclared properties in EXCEPTION mode |
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| 439 | * |
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| 440 | * @return void |
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| 441 | */ |
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| 442 | public function testUnserializeUndeclaredPropertyException() |
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| 450 | |||
| 451 | /** |
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| 452 | * Test serialize with recursion |
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| 453 | * |
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| 454 | * @return void |
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| 455 | */ |
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| 456 | public function testSerializeRecursion() |
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| 473 | |||
| 474 | /** |
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| 475 | * Test unserialize with recursion |
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| 476 | * |
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| 477 | * @return void |
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| 478 | */ |
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| 479 | public function testUnserializeRecursion() |
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| 494 | |||
| 495 | /** |
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| 496 | * Test unserialize with bad JSON |
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| 497 | * |
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| 498 | * @return void |
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| 499 | */ |
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| 500 | public function testUnserializeBadJSON() |
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| 505 | |||
| 506 | /** |
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| 507 | * The test attempts to serialize an array containing a NAN |
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| 508 | */ |
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| 509 | public function testSerializeInvalidData() |
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| 518 | |||
| 519 | /** |
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| 520 | * |
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| 521 | * @return void |
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| 522 | */ |
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| 523 | public function testSerializeBinaryStringScalar() |
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| 533 | |||
| 534 | /** |
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| 535 | * |
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| 536 | * @return void |
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| 537 | */ |
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| 538 | public function testSerializeArrayWithBinaryStringsAsValues() |
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| 549 | |||
| 550 | /** |
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| 551 | * Starting from 1 and not from 0 because php cannot handle the nil character (\u0000) in json keys as per: |
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| 552 | * https://github.com/remicollet/pecl-json-c/issues/7 |
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| 553 | * https://github.com/json-c/json-c/issues/108 |
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| 554 | * |
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| 555 | * @return void |
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| 556 | */ |
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| 557 | public function testSerializeArrayWithBinaryStringsAsKeys() |
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| 568 | |||
| 569 | /** |
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| 570 | * |
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| 571 | * @return void |
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| 572 | */ |
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| 573 | public function testSerializeObjectWithBinaryStrings() |
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| 586 | |||
| 587 | /* |
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| 588 | * Test namespace change (backward compatibility) |
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| 589 | * |
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| 590 | * @return void |
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| 591 | * @deprecated |
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| 592 | */ |
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| 593 | public function testNamespaceRename() |
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| 601 | |||
| 602 | /** |
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| 603 | * Test serialization of SplDoubleLinkedList |
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| 604 | * |
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| 605 | * @return void |
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| 606 | */ |
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| 607 | public function testSerializationOfSplDoublyLinkedList() |
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| 615 | } |
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| 616 |
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.