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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
import NIOWebSocket
final class NIOWebSocketFrameAggregatorTests: XCTestCase {
var channel: EmbeddedChannel!
override func setUp() {
channel = EmbeddedChannel(
handler: NIOWebSocketFrameAggregator(
minNonFinalFragmentSize: 1,
maxAccumulatedFrameCount: 4,
maxAccumulatedFrameSize: 32
)
)
}
override func tearDown() {
XCTAssertEqual(try self.channel.finish().isClean, true)
}
func testEmptyButFinalFrameIsForwardedEvenIfMinNonFinalFragmentSizeIsGreaterThanZero(){
let frame = WebSocketFrame(fin: true, opcode: .binary, data: ByteBuffer())
XCTAssertNoThrow(try channel.writeInbound(frame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), frame)
}
func testTooSmallAndNonFinalFrameThrows(){
let frame = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer())
XCTAssertThrowsError(try channel.writeInbound(frame))
}
func testTooBigFrameThrows(){
let frame = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer(repeating: 2, count: 33))
XCTAssertThrowsError(try channel.writeInbound(frame))
}
func testTooBigAccumulatedFrameThrows(){
let frame1 = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer(repeating: 2, count: 32))
XCTAssertNoThrow(try channel.writeInbound(frame1))
let frame2 = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer(repeating: 3, count: 1))
XCTAssertThrowsError(try channel.writeInbound(frame2))
}
func testTooManyFramesThrow(){
let firstFrame = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(firstFrame))
let fragment = WebSocketFrame(fin: false, opcode: .continuation, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertThrowsError(try channel.writeInbound(fragment))
}
func testAlmostTooManyFramesDoNotThrow(){
let firstFrame = WebSocketFrame(fin: false, opcode: .binary, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(firstFrame))
let fragment = WebSocketFrame(fin: false, opcode: .continuation, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(fragment))
let lastFrame = WebSocketFrame(fin: true, opcode: .continuation, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(lastFrame))
let completeFrame = WebSocketFrame(fin: true, opcode: .binary, data: ByteBuffer(repeating: 2, count: 8))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), completeFrame)
}
func testTextFrameIsStillATextFrameAfterAggregation(){
let firstFrame = WebSocketFrame(fin: false, opcode: .text, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(firstFrame))
let fragment = WebSocketFrame(fin: false, opcode: .continuation, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(fragment))
let lastFrame = WebSocketFrame(fin: true, opcode: .continuation, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(lastFrame))
let completeFrame = WebSocketFrame(fin: true, opcode: .text, data: ByteBuffer(repeating: 2, count: 8))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), completeFrame)
}
func testPingFrameIsForwarded(){
let controlFrame = WebSocketFrame(fin: true, opcode: .ping, data: ByteBuffer())
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame)
let fragment = WebSocketFrame(fin: false, opcode: .text, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame, "should forward control frames during buffering")
}
func testPongFrameIsForwarded(){
let controlFrame = WebSocketFrame(fin: true, opcode: .pong, data: ByteBuffer())
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame)
let fragment = WebSocketFrame(fin: false, opcode: .text, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame, "should forward control frames during buffering")
}
func testCloseConnectionFrameIsForwarded(){
let controlFrame = WebSocketFrame(fin: true, opcode: .connectionClose, data: ByteBuffer())
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame)
let fragment = WebSocketFrame(fin: false, opcode: .text, data: ByteBuffer(repeating: 2, count: 2))
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(controlFrame))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), controlFrame, "should forward control frames during buffering")
}
func testFrameAggregationWithMask(){
var firstFrameData = ByteBuffer(repeating: 2, count: 2)
let firsFrameMask: WebSocketMaskingKey = [1, 2, 3, 4]
firstFrameData.webSocketMask(firsFrameMask)
let firstFrame = WebSocketFrame(fin: false, opcode: .binary, maskKey: firsFrameMask, data: firstFrameData)
XCTAssertNoThrow(try channel.writeInbound(firstFrame))
var fragmentData = ByteBuffer(repeating: 3, count: 2)
let fragmentMaskKey: WebSocketMaskingKey = [5, 6, 7, 8]
fragmentData.webSocketMask(fragmentMaskKey)
let fragment = WebSocketFrame(fin: false, opcode: .continuation, maskKey: fragmentMaskKey, data: fragmentData)
XCTAssertNoThrow(try channel.writeInbound(fragment))
XCTAssertNoThrow(try channel.writeInbound(fragment))
var lastFrameData = ByteBuffer(repeating: 4, count: 2)
let lastFrameMaskKey: WebSocketMaskingKey = [9, 10, 11, 12]
lastFrameData.webSocketMask(lastFrameMaskKey)
let lastFrame = WebSocketFrame(fin: true, opcode: .continuation, maskKey: lastFrameMaskKey, data: lastFrameData)
XCTAssertNoThrow(try channel.writeInbound(lastFrame))
let completeFrame = WebSocketFrame(fin: true, opcode: .binary, data: ByteBuffer(bytes: [2, 2, 3, 3, 3, 3, 4, 4]))
XCTAssertEqual(try channel.readInbound(as: WebSocketFrame.self), completeFrame)
}
}
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