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

test("comments delegate checking to their wrapped values", () => {
  const commentedNumber = t.num.comment("A number");
  const num = commentedNumber.assert(5);
  expect(num + 1).toEqual(6);
});

test("comments delegate one-pass slicing to their wrapped values", () => {
  const check = t.subtype({ id: t.str }).comment("An object");
  let reads = 0;
  const input = Object.defineProperty({}, "id", {
    enumerable: true,
    get() {
      reads += 1;
      return reads === 1 ? "valid" : 5;
    },
  });

  expect(check.slice(input)).toEqual({ id: "valid" });
  expect(reads).toBe(1);
});

test("multiline comments don't generate extra lines for pure whitespace", () => {
  const commented = t.num.comment(`
    A test multiline comment.
    The preceding and trailing newlines should be ignored.
  `);
  expect(t.toTypescript(commented)).toEqual(
    "/*\n * A test multiline comment.\n * The preceding and trailing newlines should be ignored.\n */\nnumber"
  );
});

test("converts to JSON Schema description by default", () => {
  const comment = t.num.comment("A number");
  expect(t.toJSONSchema("num", comment)).toEqual({
    $schema: t.JSON_SCHEMA_VERSION,
    title: "num",
    description: "A number",
    type: "number",
  });
});

test("Strips whitespace when converting to JSON Schema multiline", () => {
  const comment = t.num.comment(`
    A test multiline comment.
    Indents should be ignored.
  `);
  expect(t.toJSONSchema("multiline", comment)).toEqual({
    $schema: t.JSON_SCHEMA_VERSION,
    title: "multiline",
    description: "A test multiline comment.\nIndents should be ignored.",
    type: "number",
  });
});