simple-review-server/src/types.ts

import { object, string, number, InferType } from "yup";

export const reviewSchema = object({
  username: string().max(30).required(),
  rating: number()
    .positive()
    .max(5)
    .test(
      "maxDigitsAfterDecimal",
      "Rating can only have at most one integer at half intervals (.0 or .5)",
      (number) => (number! * 10) % 5 === 0,
    )
    .required(),
  title: string().max(50).required(),
  content: string().max(2000).notRequired(),
});

export type Review = InferType<typeof reviewSchema>;