fix: update context can be awaited before start

src/index.test.ts

@@ -815,6 +815,44 @@ test('Should note include context fields with "null" value', async () => {
     expect(url.searchParams.get('sessionId')).toBe('0');
 });
 
+test('Should update context fields with await', async () => {
+    fetchMock.mockResponses(
+        [JSON.stringify(data), { status: 200 }],
+        [JSON.stringify(data), { status: 304 }]
+    );
+    const config: IConfig = {
+        url: 'http://localhost/test',
+        clientKey: '12',
+        appName: 'web',
+        environment: 'prod',
+    };
+    const client = new UnleashClient(config);
+    await client.updateContext({
+        userId: '123',
+        sessionId: '456',
+        remoteAddress: 'address',
+        properties: {
+            property1: 'property1',
+            property2: 'property2',
+        },
+    });
+
+    await client.start();
+
+    jest.advanceTimersByTime(1001);
+
+    const url = new URL(getTypeSafeRequestUrl(fetchMock));
+
+    expect(url.searchParams.get('userId')).toEqual('123');
+    expect(url.searchParams.get('sessionId')).toEqual('456');
+    expect(url.searchParams.get('remoteAddress')).toEqual('address');
+    expect(url.searchParams.get('properties[property1]')).toEqual('property1');
+    expect(url.searchParams.get('properties[property2]')).toEqual('property2');
+    expect(url.searchParams.get('appName')).toEqual('web');
+    expect(url.searchParams.get('environment')).toEqual('prod');
+});
+
+
 test('Should update context fields on request', async () => {
     fetchMock.mockResponses(
         [JSON.stringify(data), { status: 200 }],

src/index.ts

@@ -108,6 +108,7 @@ export class UnleashClient extends TinyEmitter {
     private customHeaders: Record<string, string>;
     private readyEventEmitted = false;
     private usePOSTrequests = false;
+    private started = false;
 
     constructor({
         storageProvider,
@@ -247,7 +248,7 @@ export class UnleashClient extends TinyEmitter {
 
         if (this.timerRef) {
             await this.fetchToggles();
-        } else {
+        } else if(this.started) {
             await new Promise<void>((resolve) => {
                 const listener = () => {
                     this.fetchToggles().then(() => {
@@ -294,6 +295,7 @@ export class UnleashClient extends TinyEmitter {
     }
 
     public async start(): Promise<void> {
+        this.started = true;
         if (this.timerRef) {
             console.error(
                 'Unleash SDK has already started, if you want to restart the SDK you should call client.stop() before starting again.'