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PoolStateMachine+RequestQueueTests.swift
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@testable import _ConnectionPoolModule
import XCTest
@available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
final class PoolStateMachine_RequestQueueTests: XCTestCase {
typealias TestQueue = TestPoolStateMachine.RequestQueue
func testHappyPath() {
var queue = TestQueue()
XCTAssert(queue.isEmpty)
let request1 = MockRequest()
queue.queue(request1)
XCTAssertEqual(queue.count, 1)
XCTAssertFalse(queue.isEmpty)
let popResult = queue.pop(max: 3)
XCTAssert(popResult.elementsEqual([request1]))
XCTAssert(queue.isEmpty)
XCTAssertEqual(queue.count, 0)
}
func testEnqueueAndPopMultipleRequests() {
var queue = TestQueue()
XCTAssert(queue.isEmpty)
var request1 = MockRequest()
queue.queue(request1)
var request2 = MockRequest()
queue.queue(request2)
var request3 = MockRequest()
queue.queue(request3)
do {
XCTAssertEqual(queue.count, 3)
XCTAssertFalse(queue.isEmpty)
let popResult = queue.pop(max: 3)
XCTAssert(popResult.elementsEqual([request1, request2, request3]))
XCTAssert(queue.isEmpty)
XCTAssertEqual(queue.count, 0)
}
XCTAssert(isKnownUniquelyReferenced(&request1))
XCTAssert(isKnownUniquelyReferenced(&request2))
XCTAssert(isKnownUniquelyReferenced(&request3))
}
func testEnqueueAndPopOnlyOne() {
var queue = TestQueue()
XCTAssert(queue.isEmpty)
var request1 = MockRequest()
queue.queue(request1)
var request2 = MockRequest()
queue.queue(request2)
var request3 = MockRequest()
queue.queue(request3)
do {
XCTAssertEqual(queue.count, 3)
XCTAssertFalse(queue.isEmpty)
let popResult = queue.pop(max: 1)
XCTAssert(popResult.elementsEqual([request1]))
XCTAssertFalse(queue.isEmpty)
XCTAssertEqual(queue.count, 2)
let removeAllResult = queue.removeAll()
XCTAssert(Set(removeAllResult) == [request2, request3])
}
XCTAssert(isKnownUniquelyReferenced(&request1))
XCTAssert(isKnownUniquelyReferenced(&request2))
XCTAssert(isKnownUniquelyReferenced(&request3))
}
func testCancellation() {
var queue = TestQueue()
XCTAssert(queue.isEmpty)
var request1 = MockRequest()
queue.queue(request1)
var request2 = MockRequest()
queue.queue(request2)
var request3 = MockRequest()
queue.queue(request3)
do {
XCTAssertEqual(queue.count, 3)
let returnedRequest2 = queue.remove(request2.id)
XCTAssert(returnedRequest2 === request2)
XCTAssertEqual(queue.count, 2)
XCTAssertFalse(queue.isEmpty)
}
// still retained by the deque inside the queue
XCTAssertEqual(queue.requests.count, 2)
XCTAssertEqual(queue.queue.count, 3)
do {
XCTAssertEqual(queue.count, 2)
XCTAssertFalse(queue.isEmpty)
let popResult = queue.pop(max: 3)
XCTAssert(popResult.elementsEqual([request1, request3]))
XCTAssert(queue.isEmpty)
XCTAssertEqual(queue.count, 0)
}
XCTAssert(isKnownUniquelyReferenced(&request1))
XCTAssert(isKnownUniquelyReferenced(&request2))
XCTAssert(isKnownUniquelyReferenced(&request3))
}
func testRemoveAllAfterCancellation() {
var queue = TestQueue()
XCTAssert(queue.isEmpty)
var request1 = MockRequest()
queue.queue(request1)
var request2 = MockRequest()
queue.queue(request2)
var request3 = MockRequest()
queue.queue(request3)
do {
XCTAssertEqual(queue.count, 3)
let returnedRequest2 = queue.remove(request2.id)
XCTAssert(returnedRequest2 === request2)
XCTAssertEqual(queue.count, 2)
XCTAssertFalse(queue.isEmpty)
}
// still retained by the deque inside the queue
XCTAssertEqual(queue.requests.count, 2)
XCTAssertEqual(queue.queue.count, 3)
do {
XCTAssertEqual(queue.count, 2)
XCTAssertFalse(queue.isEmpty)
let removeAllResult = queue.removeAll()
XCTAssert(Set(removeAllResult) == [request1, request3])
XCTAssert(queue.isEmpty)
XCTAssertEqual(queue.count, 0)
}
XCTAssert(isKnownUniquelyReferenced(&request1))
XCTAssert(isKnownUniquelyReferenced(&request2))
XCTAssert(isKnownUniquelyReferenced(&request3))
}
}