claude-code/src/utils/__tests__/semanticNumber.test.ts

import { describe, expect, test } from "bun:test";
import { z } from "zod/v4";
import { semanticNumber } from "../semanticNumber";

describe("semanticNumber", () => {
  test("parses number 42", () => {
    expect(semanticNumber().parse(42)).toBe(42);
  });

  test("parses number 0", () => {
    expect(semanticNumber().parse(0)).toBe(0);
  });

  test("parses negative number -5", () => {
    expect(semanticNumber().parse(-5)).toBe(-5);
  });

  test("parses float 3.14", () => {
    expect(semanticNumber().parse(3.14)).toBeCloseTo(3.14);
  });

  test("parses string '42' to 42", () => {
    expect(semanticNumber().parse("42")).toBe(42);
  });

  test("parses string '-7.5' to -7.5", () => {
    expect(semanticNumber().parse("-7.5")).toBe(-7.5);
  });

  test("rejects string 'abc'", () => {
    expect(() => semanticNumber().parse("abc")).toThrow();
  });

  test("rejects empty string ''", () => {
    expect(() => semanticNumber().parse("")).toThrow();
  });

  test("rejects null", () => {
    expect(() => semanticNumber().parse(null)).toThrow();
  });

  test("rejects boolean true", () => {
    expect(() => semanticNumber().parse(true)).toThrow();
  });

  test("works with custom inner schema (z.number().int().min(0))", () => {
    const schema = semanticNumber(z.number().int().min(0));
    expect(schema.parse(5)).toBe(5);
    expect(schema.parse("10")).toBe(10);
    expect(() => schema.parse(-1)).toThrow();
  });
});