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1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | namespace League\Event; |
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6 | |||
7 | use PHPUnit\Framework\TestCase; |
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8 | use Psr\EventDispatcher\ListenerProviderInterface; |
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9 | use stdClass; |
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10 | |||
11 | class EventDispatcherTest extends TestCase |
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12 | { |
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13 | /** |
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14 | * @test |
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15 | */ |
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16 | public function listening_to_a_plain_object_event(): void |
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17 | { |
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18 | $dispatcher = new EventDispatcher(); |
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19 | $listenerSpy = new ListenerSpy(); |
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20 | $event = new stdClass; |
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21 | |||
22 | $dispatcher->subscribeTo(stdClass::class, $listenerSpy); |
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23 | $dispatcher->dispatch($event); |
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24 | |||
25 | $this->assertTrue($listenerSpy->wasCalledWith($event)); |
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26 | } |
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27 | |||
28 | /** |
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29 | * @test |
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30 | */ |
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31 | public function dispatching_returns_the_event_object(): void |
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32 | { |
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33 | $event = new stdClass(); |
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34 | $dispatcher = new EventDispatcher(); |
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35 | |||
36 | $returnedEvent = $dispatcher->dispatch($event); |
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37 | |||
38 | $this->assertSame($event, $returnedEvent); |
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39 | } |
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40 | |||
41 | /** |
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42 | * @test |
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43 | */ |
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44 | public function listening_to_a_named_event(): void |
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45 | { |
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46 | $dispatcher = new EventDispatcher(); |
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47 | $listenerSpy = new ListenerSpy(); |
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48 | $event = new StubNamedEvent('event.name'); |
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49 | |||
50 | $dispatcher->subscribeTo('event.name', $listenerSpy); |
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51 | $dispatcher->dispatch($event); |
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52 | |||
53 | $this->assertTrue($listenerSpy->wasCalledWith($event)); |
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54 | } |
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55 | |||
56 | /** |
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57 | * @test |
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58 | */ |
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59 | public function listening_to_a_named_event_ignores_other_names(): void |
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60 | { |
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61 | $dispatcher = new EventDispatcher(); |
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62 | $listenerSpy = new ListenerSpy(); |
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63 | $dispatcher->subscribeTo('event.name', $listenerSpy); |
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64 | $dispatcher->dispatch(new StubNamedEvent('event.name')); |
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65 | $dispatcher->dispatch(new StubNamedEvent('other.event.name')); |
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66 | |||
67 | $this->assertEquals(1, $listenerSpy->numberOfTimeCalled()); |
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68 | } |
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69 | |||
70 | /** |
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71 | * @test |
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72 | */ |
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73 | View Code Duplication | public function it_uses_a_provided_listener_provider(): void |
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0 ignored issues
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74 | { |
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75 | $listenerSpy = new ListenerSpy(); |
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76 | $provider = new PrioritizedListenerRegistry(); |
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77 | $provider->subscribeTo(stdClass::class, $listenerSpy); |
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78 | $dispatcher = new EventDispatcher($provider); |
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79 | $event = new stdClass(); |
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80 | |||
81 | $dispatcher->dispatch($event); |
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82 | |||
83 | $this->assertTrue($listenerSpy->wasCalledWith($event)); |
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84 | } |
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85 | |||
86 | /** |
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87 | * @test |
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88 | */ |
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89 | View Code Duplication | public function it_only_keeps_notifying_handlers_when_the_event_propagation_is_not_stopped(): void |
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0 ignored issues
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show
This method seems to be duplicated in your project.
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository.
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90 | { |
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91 | $dispatcher = new EventDispatcher(); |
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92 | $listenerSpy = new ListenerSpy(); |
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93 | $event = new StubStoppableEvent(); |
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94 | |||
95 | $dispatcher->subscribeTo( |
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96 | StubStoppableEvent::class, |
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97 | function (StubStoppableEvent $event) { |
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98 | $event->stopPropagation(); |
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99 | } |
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100 | ); |
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101 | $dispatcher->subscribeTo(StubStoppableEvent::class, $listenerSpy); |
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102 | $dispatcher->dispatch($event); |
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103 | |||
104 | $this->assertFalse($listenerSpy->wasCalledWith($event)); |
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105 | } |
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106 | |||
107 | /** |
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108 | * @test |
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109 | */ |
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110 | public function it_calls_one_time_listeners_one_time(): void |
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111 | { |
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112 | $normalListener = new ListenerSpy(); |
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113 | $oneTimeListener = new ListenerSpy(); |
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114 | |||
115 | $dispatcher = new EventDispatcher(); |
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116 | $dispatcher->subscribeTo(stdClass::class, $normalListener); |
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117 | $dispatcher->subscribeOnceTo(stdClass::class, $oneTimeListener); |
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118 | |||
119 | $dispatcher->dispatch(new stdClass()); |
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120 | $dispatcher->dispatch(new stdClass()); |
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121 | $dispatcher->dispatch(new stdClass()); |
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122 | |||
123 | $this->assertEquals(1, $oneTimeListener->numberOfTimeCalled()); |
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124 | $this->assertEquals(3, $normalListener->numberOfTimeCalled()); |
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125 | } |
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126 | |||
127 | /** |
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128 | * @test |
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129 | * @dataProvider dpScenariosCausingSubscribingFailure |
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130 | */ |
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131 | public function subscribing_does_not_work_when_the_underlying_provider_does_not_allow_subscribing( |
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132 | callable $scenario |
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133 | ): void { |
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134 | $provider = new class() implements ListenerProviderInterface { |
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135 | public function getListenersForEvent(object $event): iterable |
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136 | { |
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137 | return []; |
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138 | } |
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139 | }; |
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140 | $dispatcher = new EventDispatcher($provider); |
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141 | |||
142 | $this->expectExceptionObject( |
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143 | UnableToSubscribeListener::becauseTheListenerProviderDoesNotAcceptListeners($provider) |
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144 | ); |
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145 | |||
146 | $scenario($dispatcher); |
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147 | } |
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148 | |||
149 | public function dpScenariosCausingSubscribingFailure(): iterable |
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150 | { |
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151 | yield "subscribing" => [ |
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152 | function (EventDispatcher $dispatcher) { |
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153 | $dispatcher->subscribeTo( |
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154 | 'event', |
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155 | function () { |
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156 | } |
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157 | ); |
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158 | }, |
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159 | ]; |
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160 | |||
161 | yield "subscribing once" => [ |
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162 | function (EventDispatcher $dispatcher) { |
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163 | $dispatcher->subscribeOnceTo( |
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164 | 'event', |
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165 | function () { |
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166 | } |
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167 | ); |
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168 | }, |
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169 | ]; |
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170 | |||
171 | yield "subscribing from subscriber" => [ |
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172 | function (EventDispatcher $dispatcher) { |
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173 | $dispatcher->subscribeListenersFrom( |
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174 | new class() implements ListenerSubscriber { |
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175 | public function subscribeListeners(ListenerRegistry $acceptor): void |
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176 | { |
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177 | } |
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178 | } |
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179 | ); |
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180 | }, |
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181 | ]; |
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182 | } |
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183 | |||
184 | /** |
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185 | * @test |
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186 | */ |
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187 | public function listeners_are_prioritized(): void |
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188 | { |
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189 | $dispatcher = new EventDispatcher(); |
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190 | $event = new StubMutableEvent('Hi!'); |
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191 | $append = static function (string $value) { |
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192 | return static function (StubMutableEvent $event) use ($value) { |
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193 | $event->append(' ' . $value); |
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194 | }; |
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195 | }; |
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196 | $appendHello = $append('Hello,'); |
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197 | $appendWorld = $append('World!'); |
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198 | $appendGoodBye = $append('Good bye!'); |
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199 | $dispatcher->subscribeTo(StubMutableEvent::class, $appendWorld, 0); |
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200 | $dispatcher->subscribeTo(StubMutableEvent::class, $appendHello, 10); |
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201 | $dispatcher->subscribeTo(StubMutableEvent::class, $appendGoodBye, -10); |
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202 | |||
203 | $dispatcher->dispatch($event); |
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204 | |||
205 | $this->assertEquals('Hi! Hello, World! Good bye!', $event->value()); |
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206 | } |
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207 | |||
208 | /** |
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209 | * @test |
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210 | */ |
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211 | public function events_from_an_event_generator_can_be_dispatched(): void |
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212 | { |
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213 | $dispatcher = new EventDispatcher(); |
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214 | $listener = new ListenerSpy(); |
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215 | $dispatcher->subscribeTo(stdClass::class, $listener); |
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216 | |||
217 | $eventGenerator = new class() implements EventGenerator { |
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218 | use EventGeneratorBehavior { |
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219 | recordEvent as public; |
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220 | } |
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221 | }; |
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222 | $eventGenerator->recordEvent(new stdClass()); |
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223 | $eventGenerator->recordEvent(new stdClass()); |
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224 | $eventGenerator->recordEvent(new stdClass()); |
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225 | $dispatcher->dispatchGeneratedEvents($eventGenerator); |
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226 | |||
227 | $this->assertEquals(3, $listener->numberOfTimeCalled()); |
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228 | } |
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229 | |||
230 | /** |
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231 | * @test |
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232 | */ |
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233 | public function listeners_can_be_subscribed_through_a_subscriber(): void |
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234 | { |
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235 | $subscriber = new class() implements ListenerSubscriber { |
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236 | public function subscribeListeners(ListenerRegistry $acceptor): void |
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237 | { |
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238 | $acceptor->subscribeTo( |
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239 | StubMutableEvent::class, |
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240 | function (StubMutableEvent $event) { |
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241 | $event->append(' mutated'); |
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242 | } |
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243 | ); |
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244 | } |
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245 | }; |
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246 | $dispatcher = new EventDispatcher(); |
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247 | $dispatcher->subscribeListenersFrom($subscriber); |
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248 | $event = new StubMutableEvent('this is'); |
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249 | $dispatcher->dispatch($event); |
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250 | |||
251 | $this->assertEquals('this is mutated', $event->value()); |
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252 | } |
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253 | } |
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254 |
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.