// =============================================================================
// Boost.js | Expression Parsing Tests
// (c) Mathigon
// =============================================================================


import tape from 'tape';
import {compile} from '../src/eval';


tape('simple expressions', (test) => {
  test.equal(compile('1+2')(), 3);
  test.equal(compile('2*(1+2)')(), 6);

  // eslint-disable-next-line no-tabs
  test.equal(compile('1 + 2  -3*	4 / 2')(), -3);

  test.equal(compile('"abc"')(), 'abc');
  test.equal(compile('a')({a: 5}), 5);
  test.equal(compile('abc')({abc: 5}), 5);

  test.equal(compile('(p+0.25)*2')({p: 0.25}), 1);
  test.equal(compile('20.574  -0.574')(), 20);

  test.end();
});

tape('scientific notation', (test) => {
  test.equal(compile('1 + 1e1 + 1')(), 12);
  test.equal(compile('1 + .72e+2 + 1')(), 74);
  test.equal(compile('1 + 11.78E-1 + 1')(), 3.178);

  test.equal(compile('1+e1')({e1: 2}), 3);

  test.end();
});

tape('arrays and properties', (test) => {
  test.equal(compile('a[1]')({a: [2, 3, 4]}), 3);
  // test.equal(compile('([2,,4])[x]')({x: 2}), 4);
  // test.equal(compile('([1,2,3])[1]')(), 2);

  test.equal(compile('x.aa')({x: {aa: 9}}), 9);
  test.equal(compile('x.a.b')({x: {a: {b: 4}}}), 4);

  test.equal(compile('fn(1)')({fn: (x: number) => x + 7}), 8);
  test.equal(compile('a.x(2)')({a: {x: (y: number) => y - 4}}), -2);

  test.end();
});


tape('this reference', (test) => {
  class Foo {
    constructor(readonly bar = 10) {}
    getBar() {
      return this.bar;
    }
  }

  const foo = new Foo();
  test.equal(compile('foo.getBar()')({foo}), 10);

  test.end();
});


tape('undefined keys', (test) => {
  test.equal(compile('x + y')({x: 1}), undefined);
  test.equal(compile('x')({}), undefined);
  test.equal(compile('!x')({}), true);
  test.end();
});


tape('xss', (test) => {

  // No eval
  test.equal(compile('x[\'__proto__\'][\'constructor\'](\'return 10\')()')({x: () => {}}), undefined);
  test.equal(compile(`x('1')`)({x: eval}), undefined);
  test.equal(compile(`x('1')`)({x: Function}), undefined);

  // No constructor or prototype
  test.equal(compile(`x['constructor']`)({x: () => {}}), undefined);
  test.equal(compile(`x['__proto__']`)({x: () => {}}), undefined);

  test.end();
});