add tests

apps/api/src/domain/policy/RequireCapability.test.ts

@@ -0,0 +1,68 @@
+import { SetMetadata } from '@nestjs/common';
+import { RequireCapability, FEATURE_AVAILABILITY_METADATA_KEY, FeatureAvailabilityMetadata } from './RequireCapability';
+import { ActionType } from './PolicyService';
+
+// Mock SetMetadata
+vi.mock('@nestjs/common', () => ({
+  SetMetadata: vi.fn(),
+}));
+
+describe('RequireCapability', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should call SetMetadata with correct key and metadata', () => {
+    const capabilityKey = 'test-feature';
+    const actionType: ActionType = 'view';
+
+    RequireCapability(capabilityKey, actionType);
+
+    expect(SetMetadata).toHaveBeenCalledWith(
+      FEATURE_AVAILABILITY_METADATA_KEY,
+      {
+        capabilityKey,
+        actionType,
+      } satisfies FeatureAvailabilityMetadata
+    );
+  });
+
+  it('should work with mutate action type', () => {
+    const capabilityKey = 'test-feature';
+    const actionType: ActionType = 'mutate';
+
+    RequireCapability(capabilityKey, actionType);
+
+    expect(SetMetadata).toHaveBeenCalledWith(
+      FEATURE_AVAILABILITY_METADATA_KEY,
+      {
+        capabilityKey,
+        actionType,
+      } satisfies FeatureAvailabilityMetadata
+    );
+  });
+
+  it('should work with different capability keys', () => {
+    const capabilityKey = 'another-feature';
+    const actionType: ActionType = 'view';
+
+    RequireCapability(capabilityKey, actionType);
+
+    expect(SetMetadata).toHaveBeenCalledWith(
+      FEATURE_AVAILABILITY_METADATA_KEY,
+      {
+        capabilityKey,
+        actionType,
+      } satisfies FeatureAvailabilityMetadata
+    );
+  });
+
+  it('should return a decorator function', () => {
+    const capabilityKey = 'test-feature';
+    const actionType: ActionType = 'view';
+
+    const decorator = RequireCapability(capabilityKey, actionType);
+
+    expect(typeof decorator).toBe('function');
+  });
+});