Working on tests.

Tests/ClientTests/ClientTests.swift

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+import Client
+@testable import ClientLive
+import CoreUnitTypes
+import Foundation
+import Logging
+import Models
+import MQTTNIO
+import NIO
+import NIOConcurrencyHelpers
+import XCTest
+
+// Can't seem to get tests to work, although we get values when ran from command line.
+final class ClientLiveTests: XCTestCase {
+  static let hostname = ProcessInfo.processInfo.environment["MOSQUITTO_SERVER"] ?? "localhost"
+  let topics = Topics()
+  
+//  func test_fetch_humidity() throws {
+//    let lock = Lock()
+//    let mqttClient = createMQTTClient(identifier: "fetchHumidity")
+//
+////    let exp = XCTestExpectation(description: "fetchHumidity")
+//
+//    let client = try createClient(mqttClient: mqttClient)
+//    var humidityRecieved: [RelativeHumidity] = []
+//
+//    _ = try mqttClient.publish(
+//      to: topics.sensors.humidity,
+//      payload: ByteBufferAllocator().buffer(string: "\(50.0)"),
+//      qos: .atLeastOnce
+//    ).wait()
+//
+//    Thread.sleep(forTimeInterval: 2)
+//
+////      .flatMapThrowing { _ in
+//        let humidity = try client.fetchHumidity(.init(topic: self.topics.sensors.humidity)).wait()
+//        XCTAssertEqual(humidity, 50)
+//        lock.withLock {
+//          humidityRecieved.append(humidity)
+//        }
+////        exp.fulfill()
+////      }.wait()
+//
+//    Thread.sleep(forTimeInterval: 2)
+//    lock.withLock {
+//      XCTAssertEqual(humidityRecieved.count, 1)
+//    }
+//
+//    try mqttClient.disconnect().wait()
+//    try mqttClient.syncShutdownGracefully()
+//
+//  }
+  
+  // MARK: - Helpers
+  func createMQTTClient(identifier: String) -> MQTTNIO.MQTTClient {
+    MQTTNIO.MQTTClient(
+          host: Self.hostname,
+          port: 1883,
+          identifier: identifier,
+          eventLoopGroupProvider: .createNew,
+          logger: self.logger,
+          configuration: .init(version: .v5_0)
+      )
+  }
+  
+  // Uses default topic names.
+  func createClient(mqttClient: MQTTNIO.MQTTClient, autoConnect: Bool = true) throws -> Client.MQTTClient {
+    if autoConnect {
+      _ = try mqttClient.connect().wait()
+    }
+    return .live(client: mqttClient, topics: .init())
+  }
+  
+  let logger: Logger = {
+      var logger = Logger(label: "MQTTTests")
+      logger.logLevel = .trace
+      return logger
+  }()
+}