//
//  PaddingTests.swift
//  CryptoSwift
//
//  Created by Marcin Krzyzanowski on 27/12/14.
//  Copyright (c) 2014 Marcin Krzyzanowski. All rights reserved.
//
import XCTest
@testable import CryptoSwift

final class PaddingTests: XCTestCase {
    func testPKCS7_0() {
        let input:Array<UInt8>    = [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6]
        let expected:Array<UInt8> = [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16]
        let padded = PKCS7().add(to: input, blockSize: 16)
        XCTAssertEqual(padded, expected, "PKCS7 failed")
        let clean = PKCS7().remove(from: padded, blockSize: nil)
        XCTAssertEqual(clean, input, "PKCS7 failed")
    }
    
    func testPKCS7_1() {
        let input:Array<UInt8>    = [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5]
        let expected:Array<UInt8> = [1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,1]
        let padded = PKCS7().add(to: input, blockSize: 16)
        XCTAssertEqual(padded, expected, "PKCS7 failed")
        let clean = PKCS7().remove(from: padded, blockSize: nil)
        XCTAssertEqual(clean, input, "PKCS7 failed")
    }
    
    func testPKCS7_2() {
        let input:Array<UInt8>    = [1,2,3,4,5,6,7,8,9,0,1,2,3,4]
        let expected:Array<UInt8> = [1,2,3,4,5,6,7,8,9,0,1,2,3,4,2,2]
        let padded = PKCS7().add(to: input, blockSize: 16)
        XCTAssertEqual(padded, expected, "PKCS7 failed")
        let clean = PKCS7().remove(from: padded, blockSize: nil)
        XCTAssertEqual(clean, input, "PKCS7 failed")
    }

    func testZeroPadding() {
        let input:Array<UInt8>    = [1,2,3,4,5,6,7,8,9]
        let expected:Array<UInt8> = [1,2,3,4,5,6,7,8,9,0,0,0,0,0,0,0]
        let padding = ZeroPadding()
        XCTAssertEqual(padding.add(to: input, blockSize: 16), expected, "ZeroPadding failed")
        XCTAssertEqual(padding.remove(from: padding.add(to: input, blockSize: 16), blockSize: 16), input, "ZeroPadding failed")
    }
    
    static let allTests =  [
        ("testPKCS7_0", testPKCS7_0),
        ("testPKCS7_1", testPKCS7_1),
        ("testPKCS7_2", testPKCS7_2),
        ("testZeroPadding", testZeroPadding)
    ]
}