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DoublyLinkedListTests.swift
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/*
* The MIT License (MIT)
*
* Copyright (C) 2019, CosmicMind, Inc. <http://cosmicmind.com>.
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import XCTest
@testable import Algorithm
class DoublyLinkedListTests: XCTestCase {
override func setUp() {
super.setUp()
}
override func tearDown() {
super.tearDown()
}
func testInt() {
var l = DoublyLinkedList<Int>()
l.insert(atFront: 1)
l.insert(atFront: 2)
l.insert(atFront: 3)
XCTAssert(3 == l.count, "Count incorrect, got \(l.count).")
XCTAssert(3 == l.front, "Front incorrect, got \(String(describing: l.front))")
XCTAssert(1 == l.back, "Back incorrect, got \(String(describing: l.back))")
l.insert(atBack: 5)
l.insert(atBack: 6)
l.insert(atBack: 7)
l.cursorToFront()
while !l.isCursorAtBack {
l.next()
}
l.cursorToBack()
while !l.isCursorAtFront {
l.previous()
}
XCTAssert(6 == l.count, "Count incorrect, got \(l.count).")
XCTAssert(3 == l.front, "Front incorrect, got \(String(describing: l.front))")
XCTAssert(7 == l.back, "Back incorrect, got \(String(describing: l.back))")
l.cursorToFront()
XCTAssert(3 == l.front && l.front == l.cursor, "Current incorrect, got \(String(describing: l.cursor))")
XCTAssert(2 == l.next(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(1 == l.next(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(5 == l.next(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(6 == l.next(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(7 == l.next(), "Test failed, got \(String(describing: l.cursor))")
l.cursorToBack()
XCTAssert(7 == l.back && l.back == l.cursor, "Current incorrect, got \(String(describing: l.cursor))")
XCTAssert(6 == l.previous(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(5 == l.previous(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(1 == l.previous(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(2 == l.previous(), "Test failed, got \(String(describing: l.cursor))")
XCTAssert(3 == l.previous(), "Test failed, got \(String(describing: l.cursor))")
l.cursorToFront()
XCTAssert(3 == l.removeAtFront() && 5 == l.count, "Test failed.")
XCTAssert(2 == l.removeAtFront() && 4 == l.count, "Test failed.")
XCTAssert(1 == l.removeAtFront() && 3 == l.count, "Test failed.")
l.cursorToBack()
XCTAssert(7 == l.removeAtBack() && 2 == l.count, "Test failed.")
XCTAssert(6 == l.removeAtBack() && 1 == l.count, "Test failed.")
XCTAssert(5 == l.removeAtBack() && 0 == l.count, "Test failed.")
l.removeAll()
l.cursorToFront()
XCTAssert(nil == l.cursor && 0 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(beforeCursor: 1)
XCTAssert(1 == l.cursor && 1 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAll()
l.cursorToBack()
XCTAssert(nil == l.cursor && 0 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(afterCursor: 1)
XCTAssert(1 == l.cursor && 1 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAll()
l.insert(atBack: 1)
XCTAssert(1 == l.cursor && 1 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(afterCursor: 2)
l.insert(afterCursor: 6)
l.next()
XCTAssert(6 == l.cursor && 3 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(beforeCursor: 3)
l.insert(beforeCursor: 5)
l.previous()
XCTAssert(5 == l.cursor && 5 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(atBack: 4)
l.previous()
l.removeAtCursor()
XCTAssert(5 == l.cursor && 5 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAtCursor()
XCTAssert(6 == l.cursor && 4 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAtCursor()
XCTAssert(2 == l.cursor && 3 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAtCursor()
XCTAssert(1 == l.previous() && 2 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAtCursor()
XCTAssert(l.front == l.cursor && l.back == l.cursor && 1 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.removeAtCursor()
XCTAssert(nil == l.cursor && 0 == l.count, "Test failed, got \(String(describing: l.cursor))")
l.insert(atFront: 1)
l.insert(atBack: 2)
l.insert(atFront: 3)
}
func testConcat() {
var l1 = DoublyLinkedList<Int>()
l1.insert(atFront: 3)
l1.insert(atFront: 2)
l1.insert(atFront: 1)
var l2 = DoublyLinkedList<Int>()
l2.insert(atBack: 4)
l2.insert(atBack: 5)
l2.insert(atBack: 6)
var l3 = l1 + l2
for x in l1 {
XCTAssert(x == l3.removeAtFront(), "Concat incorrect.")
}
for x in l2 {
XCTAssert(x == l3.removeAtFront(), "Concat incorrect.")
}
}
func testPerformance() {
self.measure() {}
}
}