feat: add tests for filterEventsByQuery (#9338)

Author: sjaanus

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

@@ -0,0 +1,109 @@
+import type { DeltaEvent } from './client-feature-toggle-delta-types';
+import { filterEventsByQuery } from './client-feature-toggle-delta';
+
+describe('filterEventsByQuery', () => {
+    const mockEvents: DeltaEvent[] = [
+        {
+            eventId: 1,
+            type: 'feature-updated',
+            feature: {
+                name: 'test-feature',
+                project: 'project1',
+                enabled: true,
+            },
+        },
+        {
+            eventId: 2,
+            type: 'feature-updated',
+            feature: {
+                name: 'alpha-feature',
+                project: 'project2',
+                enabled: true,
+            },
+        },
+        {
+            eventId: 3,
+            type: 'feature-removed',
+            featureName: 'beta-feature',
+            project: 'project3',
+        },
+        {
+            eventId: 4,
+            type: 'segment-updated',
+            segment: { id: 1, name: 'my-segment', constraints: [] },
+        },
+        { eventId: 5, type: 'segment-removed', segmentId: 2 },
+    ];
+    test('filters events based on eventId', () => {
+        const requiredRevisionId = 2;
+        const result = filterEventsByQuery(
+            mockEvents,
+            requiredRevisionId,
+            ['project3'],
+            '',
+        );
+        expect(result).toEqual([
+            {
+                eventId: 3,
+                type: 'feature-removed',
+                featureName: 'beta-feature',
+                project: 'project3',
+            },
+            {
+                eventId: 4,
+                type: 'segment-updated',
+                segment: { id: 1, name: 'my-segment', constraints: [] },
+            },
+            { eventId: 5, type: 'segment-removed', segmentId: 2 },
+        ]);
+    });
+
+    test('returns all projects', () => {
+        const result = filterEventsByQuery(mockEvents, 0, ['*'], '');
+        expect(result).toEqual(mockEvents);
+    });
+
+    test('filters by name prefix', () => {
+        const result = filterEventsByQuery(
+            mockEvents,
+            0,
+            ['project1', 'project2'],
+            'alpha',
+        );
+        expect(result).toEqual([
+            {
+                eventId: 2,
+                type: 'feature-updated',
+                feature: {
+                    name: 'alpha-feature',
+                    project: 'project2',
+                    enabled: true,
+                },
+            },
+            {
+                eventId: 4,
+                type: 'segment-updated',
+                segment: { id: 1, name: 'my-segment', constraints: [] },
+            },
+            { eventId: 5, type: 'segment-removed', segmentId: 2 },
+        ]);
+    });
+
+    test('filters by project list', () => {
+        const result = filterEventsByQuery(mockEvents, 0, ['project3'], 'beta');
+        expect(result).toEqual([
+            {
+                eventId: 3,
+                type: 'feature-removed',
+                featureName: 'beta-feature',
+                project: 'project3',
+            },
+            {
+                eventId: 4,
+                type: 'segment-updated',
+                segment: { id: 1, name: 'my-segment', constraints: [] },
+            },
+            { eventId: 5, type: 'segment-removed', segmentId: 2 },
+        ]);
+    });
+});