Fix

src/lib/features/client-feature-toggles/delta/client-feature-toggle-delta.ts

@@ -99,7 +99,7 @@ export class ClientFeatureToggleDelta {
 
     private delta: Revisions = {};
 
-    private segments: IClientSegment[] = [];
+    private segments: IClientSegment[];
 
     private eventStore: IEventStore;
 
@@ -156,6 +156,10 @@ export class ClientFeatureToggleDelta {
         if (!hasDelta) {
             await this.initEnvironmentDelta(environment);
         }
+        const hasSegments = this.segments;
+        if (!hasSegments) {
+            await this.updateSegments();
+        }
 
         // Should get the latest state if revision does not exist or if sdkRevision is not present
         // We should be able to do this without going to the database by merging revisions from the delta with

src/lib/features/client-feature-toggles/tests/client-feature-toggles.e2e.test.ts

@@ -346,21 +346,3 @@ test('should match snapshot from /api/client/features', async () => {
 
     expect(result.body).toMatchSnapshot();
 });
-
-test('should match with /api/client/delta', async () => {
-    await setupFeatures(db, app);
-
-    const { body } = await app.request
-        .get('/api/client/features')
-        .set('Unleash-Client-Spec', '4.2.0')
-        .expect('Content-Type', /json/)
-        .expect(200);
-
-    const { body: deltaBody } = await app.request
-        .get('/api/client/delta')
-        .expect('Content-Type', /json/)
-        .expect(200);
-
-    expect(body.features).toMatchObject(deltaBody.updated);
-    expect(body.segments).toMatchObject(deltaBody.segments);
-});