Add client event for status changes. Closes #668

SocketIO-MacTests/SocketSideEffectTest.swift

@@ -10,16 +10,6 @@ import XCTest
 @testable import SocketIO
 
 class SocketSideEffectTest: XCTestCase {
-    let data = "test".data(using: String.Encoding.utf8)!
-    let data2 = "test2".data(using: String.Encoding.utf8)!
-    private var socket: SocketIOClient!
-    
-    override func setUp() {
-        super.setUp()
-        socket = SocketIOClient(socketURL: URL(string: "http://localhost/")!)
-        socket.setTestable()
-    }
-    
     func testInitialCurrentAck() {
         XCTAssertEqual(socket.currentAck, -1)
     }
@@ -165,4 +155,35 @@ class SocketSideEffectTest: XCTestCase {
         XCTAssert(manager["test"] == nil, "socket not removed")
 
     }
+
+    func testChangingStatusCallsStatusChangeHandler() {
+        let expect = expectation(description: "The client should announce when the status changes")
+        let statusChange = SocketIOClientStatus.connecting
+
+        socket.on("statusChange") {data, ack in
+            guard let status = data[0] as? SocketIOClientStatus else {
+                XCTFail("Status should be one of the defined statuses")
+
+                return
+            }
+
+            XCTAssertEqual(status, statusChange, "The status changed should be the one set")
+
+            expect.fulfill()
+        }
+
+        socket.setTestStatus(statusChange)
+
+        waitForExpectations(timeout: 0.2)
+    }
+
+    let data = "test".data(using: String.Encoding.utf8)!
+    let data2 = "test2".data(using: String.Encoding.utf8)!
+    private var socket: SocketIOClient!
+
+    override func setUp() {
+        super.setUp()
+        socket = SocketIOClient(socketURL: URL(string: "http://localhost/")!)
+        socket.setTestable()
+    }
 }

Source/SocketIOClient.swift

@@ -47,6 +47,8 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
             default:
                 break
             }
+
+            handleEvent("statusChange", data: [status], isInternalMessage: true)
         }
     }
 
@@ -551,6 +553,10 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
         status = .connected
     }
 
+    func setTestStatus(_ status: SocketIOClientStatus) {
+        self.status = status
+    }
+
     func setTestEngine(_ engine: SocketEngineSpec?) {
         self.engine = engine
     }