Extract components and add more tests

src/Tests/Task/TasksTest.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace Toalett\Multiprocessing\Tests\Task;
+
+use PHPUnit\Framework\MockObject\MockObject;
+use React\EventLoop\LoopInterface;
+use Toalett\Multiprocessing\Task\Task;
+use Toalett\Multiprocessing\Task\Tasks;
+use PHPUnit\Framework\TestCase;
+use Toalett\Multiprocessing\Tests\Tools\PropertyInspector;
+
+class TasksTest extends TestCase
+{
+	use PropertyInspector;
+
+	public function testItAcceptsZeroTasks(): void
+	{
+		$this->expectNotToPerformAssertions();
+		new Tasks();
+	}
+
+	public function testItAcceptsMultipleTasks(): void
+	{
+		$this->expectNotToPerformAssertions();
+		new Tasks(
+			$this->createMock(Task::class),
+			$this->createMock(Task::class)
+		);
+	}
+
+	public function testItDoesNotReEnableWhenEnabled(): void
+	{
+		$loop = $this->createMock(LoopInterface::class);
+		$task = $this->createMock(Task::class);
+		$tasks = new Tasks($task);
+
+		$task->expects(self::once())
+			->method('enable')
+			->with($loop);
+
+		$tasks->enable($loop);
+		$tasks->enable($loop);
+	}
+
+	public function testItEnablesAllTasksWhenEnableCalled(): void
+	{
+		$loop = $this->createMock(LoopInterface::class);
+		$task1 = $this->createMock(Task::class);
+		$task2 = $this->createMock(Task::class);
+		$task3 = $this->createMock(Task::class);
+
+		foreach([$task1, $task2, $task3] as $task) {
+			/** @var MockObject|Task $task */
+			$task->expects(self::once())->method('enable')->with($loop);
+		}
+
+		(new Tasks($task1, $task2, $task3))->enable($loop);
+	}
+
+	public function testItCancelsAllTasksWhenCancelCalled(): void
+	{
+		$loop = $this->createMock(LoopInterface::class);
+		$task1 = $this->createMock(Task::class);
+		$task2 = $this->createMock(Task::class);
+		$task3 = $this->createMock(Task::class);
+
+		foreach([$task1, $task2, $task3] as $task) {
+			/** @var MockObject|Task $task */
+			$task->expects(self::once())->method('cancel')->with($loop);
+		}
+
+		$tasks = new Tasks($task1, $task2, $task3);
+		$this->setProperty($tasks, 'loop', $loop);
+		$tasks->cancel();
+	}
+
+	public function testItDoesNotCancelTasksWhenTheyAreNotEnabled(): void
+	{
+		$task1 = $this->createMock(Task::class);
+		$task2 = $this->createMock(Task::class);
+		$task3 = $this->createMock(Task::class);
+
+		foreach([$task1, $task2, $task3] as $task) {
+			/** @var MockObject|Task $task */
+			$task->expects(self::never())->method('cancel');
+		}
+
+		$tasks = new Tasks($task1, $task2, $task3);
+		$tasks->cancel();
+	}
+}