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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2017-2018 Apple Inc. and the SwiftNIO project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import XCTest
import NIO
class MarkedCircularBufferTests: XCTestCase {
func testEmptyMark() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 8)
XCTAssertFalse(buf.hasMark)
XCTAssertNil(buf.markedElement)
XCTAssertNil(buf.markedElementIndex)
buf.mark()
XCTAssertFalse(buf.hasMark)
XCTAssertNil(buf.markedElement)
XCTAssertNil(buf.markedElementIndex)
}
func testSimpleMark() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 8)
for i in 1...4 { buf.append(i) }
buf.mark()
for i in 5...8 { buf.append(i) }
XCTAssertTrue(buf.hasMark)
XCTAssertEqual(buf.markedElement, 4)
XCTAssertEqual(buf.markedElementIndex, buf.index(buf.startIndex, offsetBy: 3))
for i in 0..<3 { XCTAssertFalse(buf.isMarked(index: buf.index(buf.startIndex, offsetBy: i))) }
XCTAssertTrue(buf.isMarked(index: buf.index(buf.startIndex, offsetBy: 3)))
for i in 4..<8 { XCTAssertFalse(buf.isMarked(index: buf.index(buf.startIndex, offsetBy: i))) }
}
func testPassingTheMark() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 8)
for i in 1...4 { buf.append(i) }
buf.mark()
for i in 5...8 { buf.append(i) }
for j in 1...3 {
XCTAssertEqual(buf.removeFirst(), j)
XCTAssertTrue(buf.hasMark)
XCTAssertEqual(buf.markedElement, 4)
XCTAssertEqual(buf.markedElementIndex, buf.index(buf.startIndex, offsetBy: 3 - j))
}
XCTAssertEqual(buf.removeFirst(), 4)
XCTAssertFalse(buf.hasMark)
XCTAssertNil(buf.markedElement)
XCTAssertNil(buf.markedElementIndex)
}
func testMovingTheMark() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 8)
for i in 1...8 {
buf.append(i)
buf.mark()
XCTAssertTrue(buf.hasMark)
XCTAssertEqual(buf.markedElement, i)
XCTAssertEqual(buf.markedElementIndex, buf.index(buf.startIndex, offsetBy: i - 1))
XCTAssertTrue(buf.isMarked(index: buf.index(buf.startIndex, offsetBy: i - 1)))
}
}
func testIndices() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
var allIndices: [MarkedCircularBuffer<Int>.Index] = []
var index = buf.startIndex
while index != buf.endIndex {
allIndices.append(index)
index = buf.index(after: index)
}
XCTAssertEqual(Array(buf.indices), allIndices)
}
func testFirst() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
XCTAssertEqual(buf.first, 1)
}
func testCount() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
XCTAssertEqual(buf.count, 4)
}
func testSubscript() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
XCTAssertEqual(buf[buf.startIndex], 1)
XCTAssertEqual(buf[buf.index(buf.startIndex, offsetBy: 3)], 4)
}
func testRangeSubscript() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
let range = buf.startIndex..<buf.index(buf.startIndex, offsetBy: 2)
XCTAssertEqual(buf[range].count, 2)
buf[range] = [0,1]
XCTAssertEqual(buf.firstIndex(of: 2), nil)
XCTAssertEqual(buf.count, 4)
}
func testIsEmpty() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
XCTAssertFalse(buf.isEmpty)
XCTAssertEqual(buf.removeFirst(), 1)
XCTAssertEqual(buf.removeFirst(), 2)
XCTAssertEqual(buf.removeFirst(), 3)
XCTAssertEqual(buf.removeFirst(), 4)
XCTAssertTrue(buf.isEmpty)
}
func testPopFirst() throws {
var buf = MarkedCircularBuffer<Int>(initialCapacity: 4)
for i in 1...4 {
buf.append(i)
}
XCTAssertFalse(buf.isEmpty)
XCTAssertEqual(buf.popFirst(), 1)
XCTAssertEqual(buf.popFirst(), 2)
XCTAssertEqual(buf.popFirst(), 3)
XCTAssertEqual(buf.popFirst(), 4)
XCTAssertNil(buf.popFirst())
XCTAssertTrue(buf.isEmpty)
}
}
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