zod/src/v4/mini/tests/checks.test.ts

TypeScript-first schema declaration and validation library with static type inference

import { expect, test } from "vitest";
import * as z from "../index.js";

// lt;
test("z.lt", () => {
  const a = z.number().check(z.lt(10));
  expect(z.safeParse(a, 9).success).toEqual(true);
  expect(z.safeParse(a, 9).data).toEqual(9);
  expect(z.safeParse(a, 10).success).toEqual(false);
});

// lte;
test("z.lte", () => {
  const a = z.number().check(z.lte(10));
  expect(z.safeParse(a, 10).success).toEqual(true);
  expect(z.safeParse(a, 10).data).toEqual(10);
  expect(z.safeParse(a, 11).success).toEqual(false);
});

// min;
test("z.max", () => {
  const a = z.number().check(z.maximum(10));
  expect(z.safeParse(a, 10).success).toEqual(true);
  expect(z.safeParse(a, 10).data).toEqual(10);
  expect(z.safeParse(a, 11).success).toEqual(false);
});

// gt;
test("z.gt", () => {
  const a = z.number().check(z.gt(10));
  expect(z.safeParse(a, 11).success).toEqual(true);
  expect(z.safeParse(a, 11).data).toEqual(11);
  expect(z.safeParse(a, 10).success).toEqual(false);
});

// gte;
test("z.gte", () => {
  const a = z.number().check(z.gte(10));
  expect(z.safeParse(a, 10).success).toEqual(true);
  expect(z.safeParse(a, 10).data).toEqual(10);
  expect(z.safeParse(a, 9).success).toEqual(false);
});

// min;
test("z.min", () => {
  const a = z.number().check(z.minimum(10));
  expect(z.safeParse(a, 10).success).toEqual(true);
  expect(z.safeParse(a, 10).data).toEqual(10);
  expect(z.safeParse(a, 9).success).toEqual(false);
});

// maxSize;
test("z.maxLength", () => {
  const a = z.array(z.string()).check(z.maxLength(3));
  expect(z.safeParse(a, ["a", "b", "c"]).success).toEqual(true);
  expect(z.safeParse(a, ["a", "b", "c", "d"]).success).toEqual(false);
});

// minSize;
test("z.minLength", () => {
  const a = z.array(z.string()).check(z.minLength(3));
  expect(z.safeParse(a, ["a", "b"]).success).toEqual(false);
  expect(z.safeParse(a, ["a", "b", "c"]).success).toEqual(true);
});

// size;
test("z.length", () => {
  const a = z.array(z.string()).check(z.length(3));
  expect(z.safeParse(a, ["a", "b"]).success).toEqual(false);
  expect(z.safeParse(a, ["a", "b", "c"]).success).toEqual(true);
  expect(z.safeParse(a, ["a", "b", "c", "d"]).success).toEqual(false);
});

// regex;
test("z.regex", () => {
  const a = z.string().check(z.regex(/^aaa$/));
  expect(z.safeParse(a, "aaa")).toMatchObject({ success: true, data: "aaa" });
  expect(z.safeParse(a, "aa")).toMatchObject({ success: false });
});

// includes;
test("z.includes", () => {
  const a = z.string().check(z.includes("asdf"));
  z.parse(a, "qqqasdfqqq");
  z.parse(a, "asdf");
  z.parse(a, "qqqasdf");
  z.parse(a, "asdfqqq");
  expect(z.safeParse(a, "qqq")).toMatchObject({ success: false });
});

// startsWith;
test("z.startsWith", () => {
  const a = z.string().check(z.startsWith("asdf"));
  z.parse(a, "asdf");
  z.parse(a, "asdfqqq");
  expect(z.safeParse(a, "qqq")).toMatchObject({ success: false });
});

// endsWith;
test("z.endsWith", () => {
  const a = z.string().check(z.endsWith("asdf"));
  z.parse(a, "asdf");
  z.parse(a, "qqqasdf");
  expect(z.safeParse(a, "asdfqqq")).toMatchObject({ success: false });
});

// lowercase;
test("z.lowercase", () => {
  const a = z.string().check(z.lowercase());
  z.parse(a, "asdf");
  expect(z.safeParse(a, "ASDF")).toMatchObject({ success: false });
});

// uppercase;
test("z.uppercase", () => {
  const a = z.string().check(z.uppercase());
  z.parse(a, "ASDF");
  expect(z.safeParse(a, "asdf")).toMatchObject({ success: false });
});

// filename;
// fileType;
// overwrite;
test("z.overwrite", () => {
  const a = z.string().check(z.overwrite((val) => val.toUpperCase()));
  expect(z.safeParse(a, "asdf")).toMatchObject({ data: "ASDF" });
});

// normalize;
// trim;
// toLowerCase;
// toUpperCase;
// property

test("abort early", () => {
  const schema = z.string().check(
    z.refine((val) => val.length > 1),
    z.refine((val) => val.length > 2, { abort: true }),
    z.refine((val) => val.length > 3)
  );
  const data = "";
  const result = z.safeParse(schema, data);
  expect(result.error!.issues.length).toEqual(2);
});