infer bigint data type

Author: Tobin Brown

src/sequelize/data-type/data-type-service.ts

@@ -18,6 +18,8 @@ export function inferDataType(designType: any): DataTypeAbstract | undefined {
   switch (designType) {
     case String:
       return DataTypes.STRING;
+    case BigInt:
+      return DataTypes.BIGINT;
     case Number:
       return DataTypes.INTEGER;
     case Boolean:

test/specs/data-type-service.spec.ts

@@ -0,0 +1,14 @@
+import {expect} from 'chai';
+import {DataType, DataTypes} from 'sequelize';
+import {inferDataType} from '../../src/sequelize/data-type/data-type-service';
+
+describe('data type service', () => {
+  describe('inferDataTypes',  () => {
+    it('correctly infers bigint data type', () => {
+      const test: bigint = BigInt(100);
+      const result: DataType = inferDataType(typeof test);
+
+      expect(result).to.equal(DataTypes.BIGINT);
+    });
+  });
+});