CodePosition.test.mjs

import { deepStrictEqual, throws } from "assert";

import CodePosition from "./CodePosition.mjs";

export default (tests) => {
  tests.add("`CodePosition` with argument 1 `line` not a number.", () => {
    throws(() => {
      new CodePosition(true);
    }, new TypeError("Argument 1 `line` must be a number."));
  });

  tests.add("`CodePosition` with argument 1 `line` < 1.", () => {
    throws(() => {
      new CodePosition(0);
    }, new RangeError("Argument 1 `line` must be >= 1."));
  });

  tests.add("`CodePosition` with argument 2 `column` not a number.", () => {
    throws(() => {
      new CodePosition(1, true);
    }, new TypeError("Argument 2 `column` must be a number."));
  });

  tests.add("`CodePosition` with argument 2 `column` < 1.", () => {
    throws(() => {
      new CodePosition(1, 0);
    }, new RangeError("Argument 2 `column` must be >= 1."));
  });

  tests.add("`CodePosition` with arguments valid.", () => {
    deepStrictEqual(Object.entries(new CodePosition(2, 3)), [
      ["line", 2],
      ["column", 3],
    ]);
  });

  tests.add("`CodePosition` instance properties are frozen.", () => {
    const codePosition = new CodePosition(1, 1);

    throws(() => {
      codePosition.line = 2;
    }, TypeError);

    throws(() => {
      codePosition.column = 2;
    }, TypeError);
  });
};