BookCatalogTests.swift

import XCTest
@testable import BookCatalog

class BookCatalogTests: XCTestCase {
  func testpopulateBookModel() {
          let masterVC = MasterViewController()
          masterVC.populateBookModel()
          XCTAssert(masterVC.bookObjects.count == masterVC.books.count, "Book objects are \(masterVC.bookObjects.count) and books are \(masterVC.books.count) in number")
    }
}