count.ts

import { expectTypeOf } from "expect-type";
import { Model, Op } from 'sequelize';

class MyModel extends Model {}

expectTypeOf(MyModel.count()).toEqualTypeOf<Promise<number>>();
expectTypeOf(MyModel.count({ group: 'tag' })).toEqualTypeOf<Promise<{ [key: string]: number }>>();
expectTypeOf(MyModel.count({ col: 'tag', distinct: true })).toEqualTypeOf<Promise<number>>();
expectTypeOf(MyModel.count({
  where: {
    updatedAt: {
      [Op.gte]: new Date()
    }
  },
  useMaster: false
})).toEqualTypeOf<Promise<number>>();