feature: a minimal implementation of staff management is done.

backend/src/common/permissions.spec.ts

@@ -0,0 +1,37 @@
+import { isUnlimitedSeats, normalizeTabPermissions, SEAT_UNLIMITED_THRESHOLD } from './permissions';
+
+describe('normalizeTabPermissions', () => {
+  it('adds READ when EDIT is present', () => {
+    expect(normalizeTabPermissions(['TAB_PATIENTS_EDIT'])).toEqual([
+      'TAB_PATIENTS_READ',
+      'TAB_PATIENTS_EDIT',
+    ]);
+  });
+
+  it('dedupes and sorts', () => {
+    expect(
+      normalizeTabPermissions([
+        'TAB_TODAY_READ',
+        'TAB_TODAY_EDIT',
+        'TAB_TODAY_READ',
+        'bogus',
+      ]),
+    ).toEqual(['TAB_TODAY_READ', 'TAB_TODAY_EDIT']);
+  });
+
+  it('accepts empty array', () => {
+    expect(normalizeTabPermissions([])).toEqual([]);
+  });
+});
+
+describe('isUnlimitedSeats', () => {
+  it('treats sentinel as unlimited', () => {
+    expect(isUnlimitedSeats(SEAT_UNLIMITED_THRESHOLD)).toBe(true);
+    expect(isUnlimitedSeats(SEAT_UNLIMITED_THRESHOLD + 1)).toBe(true);
+  });
+
+  it('treats normal caps as limited', () => {
+    expect(isUnlimitedSeats(5)).toBe(false);
+    expect(isUnlimitedSeats(15)).toBe(false);
+  });
+});