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:
Complex classes like RawDrupalContext 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 RawDrupalContext, and based on these observations, apply Extract Interface, too.
1 | <?php |
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28 | class RawDrupalContext extends RawMinkContext implements DrupalAwareInterface { |
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29 | |||
30 | use DrupalParametersTrait; |
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31 | |||
32 | /** |
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33 | * Drupal driver manager. |
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34 | * |
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35 | * @var \Drupal\DrupalDriverManager |
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36 | */ |
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37 | private $drupal; |
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38 | |||
39 | /** |
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40 | * Event dispatcher object. |
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41 | * |
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42 | * @var \Behat\Testwork\Hook\HookDispatcher |
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43 | */ |
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44 | protected $dispatcher; |
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45 | |||
46 | /** |
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47 | * Drupal authentication manager. |
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48 | * |
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49 | * @var \Drupal\DrupalExtension\Manager\DrupalAuthenticationManagerInterface |
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50 | */ |
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51 | protected $authenticationManager; |
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52 | |||
53 | /** |
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54 | * Drupal user manager. |
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55 | * |
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56 | * @var \Drupal\DrupalExtension\Manager\DrupalUserManagerInterface |
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57 | */ |
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58 | protected $userManager; |
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59 | |||
60 | /** |
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61 | * Keep track of nodes so they can be cleaned up. |
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62 | * |
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63 | * @var array |
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64 | */ |
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65 | protected $nodes = array(); |
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66 | |||
67 | /** |
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68 | * Keep track of all terms that are created so they can easily be removed. |
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69 | * |
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70 | * @var array |
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71 | */ |
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72 | protected $terms = array(); |
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73 | |||
74 | /** |
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75 | * Keep track of any roles that are created so they can easily be removed. |
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76 | * |
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77 | * @var array |
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78 | */ |
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79 | protected $roles = array(); |
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80 | |||
81 | /** |
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82 | * Keep track of any languages that are created so they can easily be removed. |
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83 | * |
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84 | * @var array |
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85 | */ |
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86 | protected $languages = array(); |
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87 | |||
88 | /** |
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89 | * {@inheritDoc} |
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90 | */ |
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91 | public function setDrupal(DrupalDriverManager $drupal) { |
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94 | |||
95 | /** |
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96 | * {@inheritDoc} |
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97 | */ |
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98 | public function getDrupal() { |
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101 | |||
102 | /** |
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103 | * {@inheritDoc} |
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104 | */ |
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105 | public function setUserManager(DrupalUserManagerInterface $userManager) { |
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108 | |||
109 | /** |
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110 | * {@inheritdoc} |
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111 | */ |
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112 | public function getUserManager() { |
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115 | |||
116 | /** |
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117 | * {@inheritdoc} |
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118 | */ |
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119 | public function setAuthenticationManager(DrupalAuthenticationManagerInterface $authenticationManager) { |
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122 | |||
123 | /** |
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124 | * {@inheritdoc} |
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125 | */ |
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126 | public function getAuthenticationManager() { |
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129 | |||
130 | /** |
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131 | * Magic setter. |
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132 | */ |
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133 | public function __set($name, $value) { |
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157 | |||
158 | /** |
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159 | * Magic getter. |
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160 | */ |
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161 | public function __get($name) { |
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176 | |||
177 | /** |
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178 | * {@inheritdoc} |
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179 | */ |
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180 | public function setDispatcher(HookDispatcher $dispatcher) { |
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183 | |||
184 | /** |
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185 | * Get active Drupal Driver. |
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186 | * |
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187 | * @return \Drupal\Driver\DrupalDriver |
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188 | */ |
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189 | public function getDriver($name = NULL) { |
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192 | |||
193 | /** |
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194 | * Get driver's random generator. |
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195 | */ |
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196 | public function getRandom() { |
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199 | |||
200 | /** |
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201 | * Massage node values to match the expectations on different Drupal versions. |
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202 | * |
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203 | * @beforeNodeCreate |
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204 | */ |
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205 | public static function alterNodeParameters(BeforeNodeCreateScope $scope) { |
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227 | |||
228 | /** |
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229 | * Remove any created nodes. |
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230 | * |
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231 | * @AfterScenario |
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232 | */ |
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233 | public function cleanNodes() { |
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240 | |||
241 | /** |
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242 | * Remove any created users. |
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243 | * |
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244 | * @AfterScenario |
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245 | */ |
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246 | public function cleanUsers() { |
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259 | |||
260 | /** |
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261 | * Remove any created terms. |
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262 | * |
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263 | * @AfterScenario |
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264 | */ |
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265 | public function cleanTerms() { |
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272 | |||
273 | /** |
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274 | * Remove any created roles. |
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275 | * |
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276 | * @AfterScenario |
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277 | */ |
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278 | public function cleanRoles() { |
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285 | |||
286 | /** |
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287 | * Remove any created languages. |
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288 | * |
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289 | * @AfterScenario |
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290 | */ |
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291 | public function cleanLanguages() { |
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298 | |||
299 | /** |
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300 | * Clear static caches. |
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301 | * |
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302 | * @AfterScenario @api |
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303 | */ |
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304 | public function clearStaticCaches() { |
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307 | |||
308 | /** |
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309 | * Dispatch scope hooks. |
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310 | * |
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311 | * @param string $scope |
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312 | * The entity scope to dispatch. |
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313 | * @param \stdClass $entity |
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314 | * The entity. |
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315 | */ |
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316 | protected function dispatchHooks($scopeType, \stdClass $entity) { |
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329 | |||
330 | /** |
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331 | * Create a node. |
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332 | * |
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333 | * @return object |
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334 | * The created node. |
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335 | */ |
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336 | View Code Duplication | public function nodeCreate($node) { |
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344 | |||
345 | /** |
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346 | * Parses the field values and turns them into the format expected by Drupal. |
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347 | * |
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348 | * Multiple values in a single field must be separated by commas. Wrap the |
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349 | * field value in double quotes in case it should contain a comma. |
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350 | * |
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351 | * Compound field properties are identified using a ':' operator, either in |
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352 | * the column heading or in the cell. If multiple properties are present in a |
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353 | * single cell, they must be separated using ' - ', and values should not |
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354 | * contain ':' or ' - '. |
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355 | * |
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356 | * Possible formats for the values: |
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357 | * A |
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358 | * A, B, "a value, containing a comma" |
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359 | * A - B |
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360 | * x: A - y: B |
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361 | * A - B, C - D, "E - F" |
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362 | * x: A - y: B, x: C - y: D, "x: E - y: F" |
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363 | * |
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364 | * See field_handlers.feature for examples of usage. |
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365 | * |
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366 | * @param string $entity_type |
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367 | * The entity type. |
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368 | * @param \stdClass $entity |
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369 | * An object containing the entity properties and fields as properties. |
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370 | * |
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371 | * @throws \Exception |
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372 | * Thrown when a field name is invalid. |
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373 | */ |
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374 | public function parseEntityFields($entity_type, \stdClass $entity) { |
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451 | |||
452 | /** |
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453 | * Create a user. |
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454 | * |
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455 | * @return object |
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456 | * The created user. |
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457 | */ |
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458 | public function userCreate($user) { |
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466 | |||
467 | /** |
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468 | * Create a term. |
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469 | * |
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470 | * @return object |
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471 | * The created term. |
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472 | */ |
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473 | View Code Duplication | public function termCreate($term) { |
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481 | |||
482 | /** |
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483 | * Creates a language. |
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484 | * |
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485 | * @param \stdClass $language |
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486 | * An object with the following properties: |
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487 | * - langcode: the langcode of the language to create. |
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488 | * |
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489 | * @return object|FALSE |
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490 | * The created language, or FALSE if the language was already created. |
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491 | */ |
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492 | public function languageCreate(\stdClass $language) { |
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501 | |||
502 | /** |
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503 | * Log-in the given user. |
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504 | * |
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505 | * @param \stdClass $user |
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506 | * The user to log in. |
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507 | */ |
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508 | public function login(\stdClass $user) { |
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511 | |||
512 | /** |
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513 | * Logs the current user out. |
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514 | */ |
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515 | public function logout() { |
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518 | |||
519 | /** |
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520 | * Determine if the a user is already logged in. |
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521 | * |
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522 | * @return boolean |
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523 | * Returns TRUE if a user is logged in for this session. |
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524 | */ |
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525 | public function loggedIn() { |
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528 | |||
529 | /** |
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530 | * User with a given role is already logged in. |
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531 | * |
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532 | * @param string $role |
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533 | * A single role, or multiple comma-separated roles in a single string. |
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534 | * |
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535 | * @return boolean |
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536 | * Returns TRUE if the current logged in user has this role (or roles). |
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537 | */ |
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538 | public function loggedInWithRole($role) { |
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541 | |||
542 | } |
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543 |
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: