test(types): add tests for `.previous` and `.set` (#13129)

types/test/define.ts

@@ -27,7 +27,7 @@ const User = sequelize.define<UserModel>(
 );
 
 async function test() {
-  expectTypeOf<UserModel>().toMatchTypeOf(new User());
+  expectTypeOf<UserModel>().toMatchTypeOf(User.build());
 
   const user = await User.findOne();
   expectTypeOf(user).toEqualTypeOf<UserModel | null>();
@@ -60,7 +60,7 @@ UntypedUser.customStaticMethod = () => {};
 async function testUntyped() {
   UntypedUser.customStaticMethod();
 
-  expectTypeOf<UntypedUserModel>().toMatchTypeOf(new UntypedUser());
+  expectTypeOf<UntypedUserModel>().toMatchTypeOf(UntypedUser.build());
 
   const user = await UntypedUser.findOne();
   expectTypeOf(user).toEqualTypeOf<UntypedUserModel | null>();

types/test/model.ts

 import { expectTypeOf } from "expect-type";
-import { Association, BelongsToManyGetAssociationsMixin, DataTypes, HasOne, Model, Sequelize } from 'sequelize';
+import { Association, BelongsToManyGetAssociationsMixin, DataTypes, HasOne, Model, Optional, Sequelize } from 'sequelize';
+import { ModelDefined } from '../lib/model';
 
 expectTypeOf<HasOne>().toMatchTypeOf<Association>();
 class MyModel extends Model {
@@ -151,3 +152,35 @@ Actor.belongsToMany(Film, {
     paranoid: true
   }
 });
+
+interface ModelAttributes {
+  id: number;
+  name: string;
+}
+
+interface CreationAttributes extends Optional<ModelAttributes, 'id'> {}
+
+const ModelWithAttributes: ModelDefined<
+  ModelAttributes,
+  CreationAttributes
+> = sequelize.define('efs', {
+  name: DataTypes.STRING
+});
+
+const modelWithAttributes = ModelWithAttributes.build();
+
+/**
+ * Tests for set() type
+ */
+expectTypeOf(modelWithAttributes.set).toBeFunction();
+expectTypeOf(modelWithAttributes.set).parameter(0).toEqualTypeOf<Partial<ModelAttributes>>();
+
+/**
+ * Tests for previous() type
+ */
+expectTypeOf(modelWithAttributes.previous).toBeFunction();
+expectTypeOf(modelWithAttributes.previous).toBeCallableWith('name');
+expectTypeOf(modelWithAttributes.previous).parameter(0).toEqualTypeOf<keyof ModelAttributes>();
+expectTypeOf(modelWithAttributes.previous).parameter(0).not.toEqualTypeOf<'unreferencedAttribute'>();
+expectTypeOf(modelWithAttributes.previous).returns.toEqualTypeOf<string | number | undefined>();
+expectTypeOf(modelWithAttributes.previous('name')).toEqualTypeOf<string | undefined>();