gistfile1.swift

//
//  CalculatorBrainTests.swift
//  Calculator
//
//  Created by Robert Collins on 30/03/2015.
//  Copyright (c) 2015 Robert Collins. All rights reserved.
//
import XCTest


class CalculatorBrainTests: XCTestCase {
    
    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 testSimpleAddition() {
        let brain = CalculatorBrain()
        brain.pushOperand(0.1)
        brain.pushOperand(0.3)
        brain.performOperation("+")
        let result = brain.evaluate()
        XCTAssertEqual(0.4, result!, "Pass")
    }
    
    func testMoreAddition() {
        let brain = CalculatorBrain()
        brain.pushOperand(3)
        brain.pushOperand(4)
        brain.pushOperand(5)
        brain.performOperation("+")
        brain.performOperation("+")
        let result = brain.evaluate()
        XCTAssertEqual(12, result!, "Pass")
    }
    
    func testAdditionDescription() {
        let brain = CalculatorBrain()
        brain.pushOperand(3)
        brain.pushOperand(4)
        brain.performOperation("+")
        let result = brain.evaluate()
        XCTAssertEqual("(3.0+4.0)", brain.description, "Pass")
    }
    
    func testMoreAdditionDescription() {
        let brain = CalculatorBrain()
        brain.pushOperand(3)
        brain.pushOperand(4)
        brain.pushOperand(5)
        brain.performOperation("+")
        brain.performOperation("+")
        let result = brain.evaluate()
        XCTAssertEqual("(3.0+(4.0+5.0))", brain.description, "Pass")
    }
    
    func testCos() {
        let brain = CalculatorBrain()
        brain.pushOperand(10)
        brain.performOperation("cos")
        let result = brain.evaluate()
        XCTAssertEqualWithAccuracy(-0.839, result!, 0.01, "Pass")
    }
    func testCosDescription() {
        let brain = CalculatorBrain()
        brain.pushOperand(10)
        brain.performOperation("cos")
        XCTAssertEqual("cos(10.0)", brain.description, "Pass")
    }
    
    func testUnaryDescription() {
        let brain = CalculatorBrain()
        brain.pushOperand(10)
        brain.performOperation("cos")
        println("\n\n" + brain.description + "\n\n")
        XCTAssertTrue(true, "Pass")
    }
}