Add PHP unit tests

Check\*
Combined\*
Convert\*
Create\Hash (stub)

4dev/tests/CoreLibsCheckPasswordTest.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test class for Check\Password
+ * @testdox CoreLibs\Check\Password method tests
+ */
+final class CoreLibsCheckPasswordTest extends TestCase
+{
+	public function passwordProvider(): array
+	{
+		return [
+			'matching password' => ['test', 'test', true],
+			'not matching password' => ['test', 'not_test', false],
+		];
+	}
+
+	public function passwordRehashProvider(): array
+	{
+		return [
+			'no rehash needed' => ['$2y$10$EgWJ2WE73DWi.hIyFRCdpejLXTvHbmTK3LEOclO1tAvXAXUNuUS4W', false],
+			'rehash needed' => ['9c42a1346e333a770904b2a2b37fa7d3', true],
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @dataProvider passwordProvider
+	 * @testdox passwordVerify $input compare to $input_hash: $expected [$_dataName]
+	 *
+	 * @param string $input
+	 * @param string $input_hash
+	 * @param boolean $expected
+	 * @return void
+	 */
+	public function testPasswordSetVerify(string $input, string $input_hash, bool $expected): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Check\Password::passwordVerify($input, \CoreLibs\Check\Password::passwordSet($input_hash))
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @dataProvider passwordRehashProvider
+	 * @testdox passwordRehashCheck $input will be $expected [$_dataName]
+	 *
+	 * @param string $input
+	 * @param boolean $expected
+	 * @return void
+	 */
+	public function testPasswordRehashCheck(string $input, bool $expected): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Check\Password::passwordRehashCheck($input)
+		);
+	}
+}
+
+// __END__