Use updated Span API for TestSpan

Author: slashmo

Sources/AsyncHTTPClient/HTTPClient.swift

@@ -515,7 +515,7 @@ public class HTTPClient {
             switch result {
             case .success(let (_, response)):
                 guard let httpResponse = response as? HTTPClient.Response else { return }
-                span.status = .init(httpResponse.status)
+                span.setStatus(.init(httpResponse.status))
                 span.attributes.http.statusCode = Int(httpResponse.status.code)
                 span.attributes.http.statusText = httpResponse.status.reasonPhrase
                 span.attributes.http.responseContentLength = httpResponse.body?.readableBytes ?? 0

Tests/AsyncHTTPClientTests/HTTPClientTests.swift

@@ -2746,10 +2746,11 @@ private final class TestTracer: TracingInstrument {
     Injector: InjectorProtocol {}
 
     final class TestSpan: Span {
-        let operationName: String
-        let kind: SpanKind
-        var status: SpanStatus?
-        let context: BaggageContext
+        private let operationName: String
+        private let kind: SpanKind
+        var context: BaggageContext
+
+        private(set) var status: SpanStatus?
         private(set) var isRecording = false
 
         var attributes: SpanAttributes = [:]
@@ -2767,6 +2768,10 @@ private final class TestTracer: TracingInstrument {
             self.endTimestamp = timestamp
         }
 
+        func setStatus(_ status: SpanStatus) {
+            self.status = status
+        }
+
         init(operationName: String, kind: SpanKind, startTimestamp: Timestamp, context: BaggageContext) {
             self.operationName = operationName
             self.kind = kind