Extracted Process Control to separate interface to allow better tests

src/Tests/ProcessControl/ForkTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Toalett\Multiprocessing\Tests\ProcessControl;
+
+use PHPUnit\Framework\TestCase;
+use Toalett\Multiprocessing\ProcessControl\Fork;
+
+class ForkTest extends TestCase
+{
+	/**
+	 * @param int $pid
+	 * @dataProvider positiveIntegerProvider
+	 */
+	public function testItSaysItIsAParentProcessWhenAPositivePidIsProvided(int $pid): void
+	{
+		$fork = new Fork($pid);
+		self::assertTrue($fork->isParent());
+		self::assertFalse($fork->isChild());
+		self::assertFalse($fork->failed());
+	}
+
+	/**
+	 * @param int $pid
+	 * @dataProvider negativeIntegerProvider
+	 */
+	public function testItSaysItFailedWhenANegativePidIsProvided(int $pid): void
+	{
+		$fork = new Fork($pid);
+		self::assertTrue($fork->isParent());
+		self::assertFalse($fork->isChild());
+		self::assertTrue($fork->failed());
+	}
+
+	public function testItSaysItIsAChildProcessWhenPidZeroIsProvided(): void
+	{
+		$fork = new Fork(0);
+		self::assertFalse($fork->isParent());
+		self::assertTrue($fork->isChild());
+		self::assertFalse($fork->failed());
+	}
+
+	public function positiveIntegerProvider(): array
+	{
+		return [
+			[1],
+			[10],
+			[1000],
+			[PHP_INT_MAX],
+		];
+	}
+
+	public function negativeIntegerProvider(): array
+	{
+		return [
+			[-1],
+			[-10],
+			[-1000],
+			[PHP_INT_MIN],
+		];
+	}
+}

src/Tests/ProcessControl/WaitTest.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Toalett\Multiprocessing\Tests\ProcessControl;
+
+use PHPUnit\Framework\TestCase;
+use Toalett\Multiprocessing\ProcessControl\Wait;
+
+class WaitTest extends TestCase
+{
+	/**
+	 * @param int $pid
+	 * @dataProvider positiveIntegerProvider
+	 */
+	public function testItSaysAChildStoppedWhenAPositivePidIsProvided(int $pid): void
+	{
+		$wait = new Wait($pid, 0);
+		self::assertTrue($wait->childStopped());
+		self::assertFalse($wait->failed());
+	}
+
+	/**
+	 * @param int $pid
+	 * @dataProvider negativeIntegerProvider
+	 */
+	public function testItSaysItFailedWhenANegativePidIsProvided(int $pid): void
+	{
+		$wait = new Wait($pid, 0);
+		self::assertFalse($wait->childStopped());
+		self::assertTrue($wait->failed());
+	}
+
+	public function positiveIntegerProvider(): array
+	{
+		return [
+			[1],
+			[10],
+			[1000],
+			[PHP_INT_MAX],
+		];
+	}
+
+	public function negativeIntegerProvider(): array
+	{
+		return [
+			[-1],
+			[-10],
+			[-1000],
+			[PHP_INT_MIN],
+		];
+	}
+}