feat(WHE-18): implement money, billing period, and typed domain ids

packages/domain/src/ids.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, test } from 'bun:test'
+
+import { DOMAIN_ERROR_CODE, DomainError } from './errors'
+import { BillingCycleId, HouseholdId, MemberId, PurchaseEntryId } from './ids'
+
+describe('IDs', () => {
+  test('creates and compares typed ids', () => {
+    const left = MemberId.from('member_1')
+    const right = MemberId.from('member_1')
+
+    expect(left.equals(right)).toBe(true)
+    expect(left.toString()).toBe('member_1')
+  })
+
+  test('typed ids with same value and different type are not equal', () => {
+    const member = MemberId.from('abc')
+    const household = HouseholdId.from('abc')
+
+    expect(member.equals(household)).toBe(false)
+  })
+
+  test('rejects invalid id values', () => {
+    expect(() => BillingCycleId.from('')).toThrow(
+      new DomainError(DOMAIN_ERROR_CODE.INVALID_ENTITY_ID, 'BillingCycleId cannot be empty')
+    )
+
+    expect(() => PurchaseEntryId.from('bad value with space')).toThrow(
+      new DomainError(
+        DOMAIN_ERROR_CODE.INVALID_ENTITY_ID,
+        'PurchaseEntryId contains invalid characters: bad value with space'
+      )
+    )
+  })
+})