rename HTTPURLResponse backendTracingID to serverTimingTraceId (#86)

Author: Hongyan Jiang

Sources/InstanaAgent/Monitors/HTTP/HTTPMarker.swift

@@ -111,7 +111,7 @@ protocol HTTPMarkerDelegate: AnyObject {
         }
 
         let result = HTTPCaptureResult(statusCode: statusCode,
-                                       backendTracingID: tracestate ?? response?.backendTracingID,
+                                       backendTracingID: tracestate ?? response?.serverTimingTraceId,
                                        header: bothHeaders,
                                        responseSize: responseSize ?? size,
                                        error: error)

Sources/InstanaAgent/Utils/Extensions/URLResponse+URLRequest+Helper.swift

@@ -10,7 +10,7 @@ extension URLResponse {
         let value: String
     }
 
-    var backendTracingID: String? {
+    var serverTimingTraceId: String? {
         guard let httpResponse = self as? HTTPURLResponse,
             let servertiming = httpResponse.value(for: "Server-Timing")
         else { return nil }

Tests/InstanaAgentTests/Utils_Tests/Extensions/URLResponseHeaderFieldsTests.swift

@@ -16,7 +16,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         AssertEqualAndNotNil(sut, backendTracingID)
@@ -29,7 +29,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         AssertEqualAndNotNil(sut, backendTracingID)
@@ -42,7 +42,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         AssertEqualAndNotNil(sut, backendTracingID)
@@ -56,7 +56,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         AssertEqualAndNotNil(sut, backendTracingID2)
@@ -69,7 +69,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         XCTAssertNil(sut)
@@ -82,7 +82,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         XCTAssertNil(sut)
@@ -95,7 +95,7 @@ class URLResponseHeaderFieldsTests: InstanaTestCase {
         let httpResponse = HTTPURLResponse(url: URL.random, statusCode: 200, httpVersion: "1.1", headerFields: headerFields)
 
         // When
-        let sut = httpResponse?.backendTracingID
+        let sut = httpResponse?.serverTimingTraceId
 
         // Then
         XCTAssertNil(sut)