Introduce enum for password generator flavour

passKitTests/Helpers/PasswordGeneratorFlavourTest.swift

@@ -0,0 +1,43 @@
+//
+//  PasswordGeneratorFlavourTest.swift
+//  passKitTests
+//
+//  Created by Danny Moesch on 28.11.18.
+//  Copyright © 2018 Bob Sun. All rights reserved.
+//
+
+import KeychainAccess
+import XCTest
+
+@testable import passKit
+
+class PasswordGeneratorFlavourTest: XCTestCase {
+
+    private let KEYCHAIN_PASSWORD_LENGTH = Keychain.generatePassword().count
+
+    func testFrom() {
+        XCTAssertEqual(PasswordGeneratorFlavour.from("Apple"), PasswordGeneratorFlavour.APPLE)
+        XCTAssertEqual(PasswordGeneratorFlavour.from("Random"), PasswordGeneratorFlavour.RANDOM)
+        XCTAssertEqual(PasswordGeneratorFlavour.from("Something"), PasswordGeneratorFlavour.RANDOM)
+        XCTAssertEqual(PasswordGeneratorFlavour.from(""), PasswordGeneratorFlavour.RANDOM)
+    }
+
+    func testDefaultLength() {
+        // Ensure properly chosen default length values. So this check no longer needs to be performed in the code.
+        PasswordGeneratorFlavour.allCases.map { $0.defaultLength }.forEach { defaultLength in
+            XCTAssertLessThanOrEqual(defaultLength.min, defaultLength.max)
+            XCTAssertLessThanOrEqual(defaultLength.def, defaultLength.max)
+            XCTAssertGreaterThanOrEqual(defaultLength.def, defaultLength.min)
+        }
+    }
+
+    func testGeneratePassword() {
+        let apple = PasswordGeneratorFlavour.APPLE
+        let random = PasswordGeneratorFlavour.RANDOM
+
+        XCTAssertEqual(apple.generatePassword(length: 4).count, KEYCHAIN_PASSWORD_LENGTH)
+        XCTAssertEqual(random.generatePassword(length: 0).count, 0)
+        XCTAssertEqual(random.generatePassword(length: 4).count, 4)
+        XCTAssertEqual(random.generatePassword(length: 100).count, 100)
+    }
+}