✅ Fix tests, add test for version detection

phpmon-tests/PhpVersionDetectionTest.swift

@@ -0,0 +1,28 @@
+//
+//  PhpVersionDetectionTest.swift
+//  phpmon-tests
+//
+//  Created by Nico Verbruggen on 14/02/2021.
+//  Copyright © 2021 Nico Verbruggen. All rights reserved.
+//
+
+import XCTest
+
+class PhpVersionDetectionTest: XCTestCase {
+
+    func testCanExtractData() throws {
+        let outcome = Actions.extractPhpVersions(from: [
+            "", // empty lines should be omitted
+            "php@8.0",
+            "php@8.0", // should only be detected once
+            "meta-php@8.0", // should be omitted, invalid
+            "php@8.0-coolio", // should be omitted, invalid
+            "php@7.0",
+            "php@5.6",
+            "php@5.4" // should be omitted, not supported
+        ], checkBinaries: false)
+        
+        XCTAssertEqual(outcome, ["8.0", "7.0", "5.6"])
+    }
+
+}