my-files-sample/Libraries/Tests/APIServiceTests/Cases/Use Cases/MakeAuthorizationHeaderUseCaseTests.swift

//
//  MakeAuthorizationHeaderUseCaseTests.swift
//  APIServiceTests
//
//  Created by Javier Cicchelli on 04/12/2022.
//  Copyright © 2022 Röck+Cöde. All rights reserved.
//

import XCTest

@testable import APIService

final class MakeAuthorizationHeaderUseCaseTests: XCTestCase {
    
    // MARK: Properties
    
    private let makeAuthHeader = MakeAuthorizationHeaderUseCase()
    
    private var username: String!
    private var password: String!
    
    private var result: [String: String]!
    
    // MARK: Test cases
    
    func test_withCorrectUsernameAndPassword() throws {
        // GIVEN
        username = "username"
        password = "password"
        
        // WHEN
        
        result = try makeAuthHeader(username: username, password: password)
        
        // THEN
        XCTAssertEqual(result.count, 1)
        XCTAssertEqual(result[.Header.Keys.authorization], "Basic dXNlcm5hbWU6cGFzc3dvcmQ=")
    }
    
    func test_withEmptyUsername() throws {
        // GIVEN
        username = ""
        password = "password"
        
        // WHEN & THEN
        XCTAssertThrowsError(try makeAuthHeader(username: username, password: password)) { error in
            XCTAssertEqual(error as? MakeAuthorizationHeaderError, .usernameIsEmpty)
        }
    }
    
    func test_withEmptyPassword() throws {
        // GIVEN
        username = "username"
        password = ""
        
        // WHEN & THEN
        XCTAssertThrowsError(try makeAuthHeader(username: username, password: password)) { error in
            XCTAssertEqual(error as? MakeAuthorizationHeaderError, .passwordIsEmpty)
        }
    }
    
    func test_withEmptyUsernameAndPassword() throws {
        // GIVEN
        username = ""
        password = ""
        
        // WHEN & THEN
        XCTAssertThrowsError(try makeAuthHeader(username: username, password: password)) { error in
            XCTAssertEqual(error as? MakeAuthorizationHeaderError, .usernameIsEmpty)
        }
    }
    
}