Medium_031_Next_Permutation_Test.swift

//
//  Medium_031_Next_Permutation_Test.swift
//  Solutions
//
//  Created by Di Wu on 5/10/15.
//  Copyright (c) 2015 diwu. All rights reserved.
//

import XCTest

class Medium_031_Next_Permutation_Test: XCTestCase, SolutionsTestCase {
    func test_001() {
        let input: [Int] = [1, 2, 3]
        let expected: [Int] = [1, 3, 2]
        asyncHelper(input: input, expected: expected)
    }
    func test_002() {
        let input: [Int] = [3, 2, 1]
        let expected: [Int] = [1, 2, 3]
        asyncHelper(input: input, expected: expected)
    }
    func test_003() {
        let input: [Int] = [1, 1, 5]
        let expected: [Int] = [1, 5, 1]
        asyncHelper(input: input, expected: expected)
    }
    func test_004() {
        let input: [Int] = [1, 2]
        let expected: [Int] = [2, 1]
        asyncHelper(input: input, expected: expected)
    }
    func test_005() {
        let input: [Int] = [1]
        let expected: [Int] = [1]
        asyncHelper(input: input, expected: expected)
    }
    func test_006() {
        let input: [Int] = [4, 2, 0, 2, 3, 2, 0]
        let expected: [Int] = [4, 2, 0, 3, 0, 2, 2]
        asyncHelper(input: input, expected: expected)
    }
    func test_007() {
        let input: [Int] = [6, 3, 4, 9, 8, 7, 1]
        let expected: [Int] = [6, 3, 7, 1, 4, 8, 9]
        asyncHelper(input: input, expected: expected)
    }
    private func asyncHelper(input: [Int], expected: [Int]) {
        weak var expectation: XCTestExpectation? = self.expectation(description:timeOutName())
        serialQueue().async(execute: { () -> Void in
            var result: [Int] = input
            Medium_031_Next_Permutation.nextPermutation(&result)
            assertHelper(expected == result, problemName:self.problemName(), input: input, resultValue: result, expectedValue: expected)
            if let unwrapped = expectation {
                unwrapped.fulfill()
            }
        })
        waitForExpectations(timeout:timeOut()) { (error: Error?) -> Void in
            if error != nil {
                assertHelper(false, problemName:self.problemName(), input: input, resultValue:self.timeOutName(), expectedValue: expected)
            }
        }
    }
}