swift4: setting up unit tests

Currently enrolled in Ray Wenderlich’s- Testing in iOS Course Notes from Lesson 1 and 2

Getting Started/Setting Up

How to Set Up an iOS Unit Test Bundle:

• Add new iOS Unit Testing Bundle Target
  • This will create a new folder with your unit test files

• Import your production code module at the top of your test file
  • @testable import MyModule

  

• Write your tests!
  • Preceed all unit tests with testMyTestName()

  Sample Test Code:

  import XCTest
  @testable import DogYears
  
  class DogYearsUnitTests: XCTestCase {
          
      let calc = Calculator()
          
      override func setUp() {
          super.setUp()
          // Put setup code here. This method is called before the invocation of each test method in the class.
      }
          
      override func tearDown() {
          // Put teardown code here. This method is called after the invocation of each test method in the class.
          super.tearDown()
      }
          
      func testAdd() {
          let result = calc.evaluate(op: "+", arg1: 2.0, arg2: 9.0)
          XCTAssert(result == 11.0, "Error: Add result does not equal 11.0")
      }
          
      func testClear() {
          let clearedResult = calc.clear()
          XCTAssert(calc.result == 0.0 , "Error: Clear result does not equal 0.0")
          XCTAssert(clearedResult == 0.0 , "Error: Return clear result does not equal 11.0")
      }
          
  }