Adding test for vipgoci_phpcs_get_version()

tests/integration/PhpcsScanGetVersionTest.php

@@ -0,0 +1,83 @@
+<?php
+/**
+ * Test vipgoci_phpcs_get_version() function.
+ *
+ * @package Automattic/vip-go-ci
+ */
+
+declare(strict_types=1);
+
+namespace Vipgoci\Tests\Integration;
+
+require_once __DIR__ . '/IncludesForTests.php';
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Class that implements the testing.
+ *
+ * @runTestsInSeparateProcesses
+ * @preserveGlobalState disabled
+ */
+final class PhpcsScanGetVersion extends TestCase {
+	/**
+	 * Options array.
+	 *
+	 * @var $options_phpcs
+	 */
+	private array $options_phpcs = array(
+		'phpcs-php-path' => null,
+		'phpcs-path'     => null,
+	);
+
+	/**
+	 * Fetch config values.
+	 */
+	protected function setUp(): void {
+		vipgoci_unittests_get_config_values(
+			'phpcs-scan',
+			$this->options_phpcs
+		);
+	}
+
+	/**
+	 * Unset option variable.
+	 */
+	protected function tearDown(): void {
+		unset( $this->options_phpcs );
+	}
+
+	/**
+	 * Test if fetched PHP interpreter version looks good.
+	 * Uses internal function to do this.
+	 *
+	 * @return void
+	 *
+	 * @covers ::vipgoci_phpcs_get_version
+	 */
+	public function testPhpcsPhpInterpreterGetVersion() :void {
+		$options_test = vipgoci_unittests_options_test(
+			$this->options_phpcs,
+			array(),
+			$this
+		);
+
+		if ( -1 === $options_test ) {
+			return;
+		}
+
+		$phpcs_version = vipgoci_phpcs_get_version(
+			$this->options_phpcs['phpcs-path'],
+			$this->options_phpcs['phpcs-php-path'],
+		);
+
+		/*
+		 * Let version_compare() take care of validating the returned
+		 * version number; the function does various sanity checks for
+		 * us so we do not have to do it manually.
+		 */
+		$this->assertTrue(
+			version_compare( $phpcs_version, '1.0.0', '>=' )
+		);
+	}
+}