fix(diagnostics): emit asyncStart after promise settlement to match native tracePromise

src/diagnostics.ts

@@ -427,17 +427,18 @@ export function traceMixed<TResult, TContext extends TraceLifecycleContext>(
     }
 
     channel.end.publish(context);
-    channel.asyncStart.publish(context);
 
     return result.then(
       (value) => {
         context.result = value;
+        channel.asyncStart.publish(context);
         channel.asyncEnd.publish(context);
         return value;
       },
       (err: unknown) => {
         context.error = err;
         channel.error.publish(context);
+        channel.asyncStart.publish(context);
         channel.asyncEnd.publish(context);
         throw err;
       },

src/execution/__tests__/diagnostics-execute-test.ts

@@ -121,6 +121,7 @@ describe('execute diagnostics channel', () => {
             rawVariableValues: undefined,
             operationName: undefined,
             operationType: OperationTypeNode.QUERY,
+            result,
           },
         },
         {
@@ -201,17 +202,18 @@ describe('execute diagnostics channel', () => {
           },
         },
         {
-          channel: 'asyncStart',
+          channel: 'error',
           context: {
             schema: asyncDeferSchema,
             document,
             rawVariableValues: undefined,
             operationName: 'Deferred',
             operationType: OperationTypeNode.QUERY,
+            error,
           },
         },
         {
-          channel: 'error',
+          channel: 'asyncStart',
           context: {
             schema: asyncDeferSchema,
             document,
@@ -456,6 +458,7 @@ describe('execute root selection set diagnostics channel', () => {
             rawVariableValues: undefined,
             operationName: undefined,
             operationType: OperationTypeNode.QUERY,
+            result,
           },
         },
         {

src/execution/__tests__/diagnostics-resolve-test.ts

@@ -130,6 +130,7 @@ describe('resolve diagnostics channel', () => {
             args: {},
             isDefaultResolver: true,
             fieldPath: 'async',
+            result: 'hello-async',
           },
         },
         {
@@ -207,6 +208,7 @@ describe('resolve diagnostics channel', () => {
             args: {},
             isDefaultResolver: true,
             fieldPath: 'async',
+            result: 'hello-thenable',
           },
         },
         {
@@ -325,7 +327,7 @@ describe('resolve diagnostics channel', () => {
           },
         },
         {
-          channel: 'asyncStart',
+          channel: 'error',
           context: {
             fieldName: 'asyncFail',
             alias: 'asyncFail',
@@ -334,10 +336,11 @@ describe('resolve diagnostics channel', () => {
             args: {},
             isDefaultResolver: true,
             fieldPath: 'asyncFail',
+            error,
           },
         },
         {
-          channel: 'error',
+          channel: 'asyncStart',
           context: {
             fieldName: 'asyncFail',
             alias: 'asyncFail',

src/execution/__tests__/diagnostics-subscribe-test.ts

@@ -145,6 +145,7 @@ describe('subscribe diagnostics channel', () => {
             rawVariableValues: undefined,
             operationName: undefined,
             operationType: OperationTypeNode.SUBSCRIPTION,
+            result,
           },
         },
         {
@@ -474,6 +475,7 @@ describe('subscribe diagnostics channel', () => {
             rawVariableValues: undefined,
             operationName: 'S',
             operationType: OperationTypeNode.SUBSCRIPTION,
+            result,
           },
         },
         {