fixed broken validation check for non-required attribiutes

__tests__/Entity.spec.ts

@@ -48,6 +48,7 @@ type User = Entity & {
   readonly id: string
   readonly createdAt: Date
   name: string
+  empty?: string
 }
 
 const createUser = defineEntity<User>({
@@ -66,6 +67,11 @@ const createUser = defineEntity<User>({
       required: true,
       validator: value => 2 < value.length,
     },
+
+    empty: {
+      required: false,
+      validator: value => guard(value),
+    },
   },
 })
 
@@ -118,6 +124,72 @@ describe('Entity', () => {
     expect(name).not.toBe(e1.name)
   })
 
+  it('partial validator 2', () => {
+    const id = '123'
+    const createdAt = new Date()
+    const name = 'daniel'
+    const empty = 'yay'
+
+    const e1 = createUser({
+      id,
+      createdAt,
+      name: 'jonathan',
+      empty,
+    })
+
+    try {
+      e1.name = ''
+      expect(true).toBeFalsy()
+    }
+    catch (error) {
+      if (error instanceof ValueError) {
+        expect(error.name).toBe('ValueError')
+        expect(error.message).toBe('name is invalid')
+      }
+      else {
+        expect(true).toBeFalsy()
+      }
+    }
+
+    expect(e1.id).toBe(id)
+    expect(e1.createdAt).toBe(createdAt)
+    expect(name).not.toBe(e1.name)
+    expect(empty).toBe(e1.empty)
+  })
+
+  it('partial validator 3', () => {
+    const id = '123'
+    const createdAt = new Date()
+    const name = 'daniel'
+    const empty = undefined
+
+    const e1 = createUser({
+      id,
+      createdAt,
+      name: 'jonathan',
+      empty,
+    })
+
+    try {
+      e1.name = ''
+      expect(true).toBeFalsy()
+    }
+    catch (error) {
+      if (error instanceof ValueError) {
+        expect(error.name).toBe('ValueError')
+        expect(error.message).toBe('name is invalid')
+      }
+      else {
+        expect(true).toBeFalsy()
+      }
+    }
+
+    expect(e1.id).toBe(id)
+    expect(e1.createdAt).toBe(createdAt)
+    expect(name).not.toBe(e1.name)
+    expect(empty).toBe(undefined)
+  })
+
   it('EntityLifecycle', () => {
     const id = '123'
     const createdAt = new Date()

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cosmicmind/domainjs",
-  "version": "0.0.1-rc-022224-4",
+  "version": "0.0.1-rc-022224-4-a-a",
   "description": "A domain-driven design framework for scalable systems.",
   "keywords": [],
   "author": {

src/Entity.ts

@@ -112,12 +112,19 @@ function createEntity<E extends Entity>(target: E, handler: EntityLifecycle<E> =
 
         for (const key in attributes) {
           const property = attributes[key] as unknown
-          if (guard(property, 'required') && property.required && !(key in target)) {
-            throw new ValueError(`${JSON.stringify(target)} ${key} is required`)
+          if (guard(property, 'required') && property.required) {
+            if (!(key in target)) {
+              throw new ValueError(`${JSON.stringify(target)} ${key} is required`)
+            }
+
+            if (guard(property, 'validator') && false === property.validator?.(target[key], entity)) {
+              throw new ValueError(`${JSON.stringify(target)} ${key} is invalid`)
+            }
           }
-
-          if (guard(property, 'validator') && false === property.validator?.(target[key], entity)) {
-            throw new ValueError(`${JSON.stringify(target)} ${key} is invalid`)
+          else if (key in target && 'undefined' !== typeof target[key]) {
+            if (guard(property, 'validator') && false === property.validator?.(target[key], entity)) {
+              throw new ValueError(`${JSON.stringify(target)} ${key} is invalid`)
+            }
           }
         }