import assert from 'assert';
import lodashStable from 'lodash';
import { falsey, args, slice, symbol, realm } from './utils.js';
import isBoolean from '../isBoolean.js';

describe('isBoolean', function() {
  it('should return `true` for booleans', function() {
    assert.strictEqual(isBoolean(true), true);
    assert.strictEqual(isBoolean(false), true);
    assert.strictEqual(isBoolean(Object(true)), true);
    assert.strictEqual(isBoolean(Object(false)), true);
  });

  it('should return `false` for non-booleans', function() {
    var expected = lodashStable.map(falsey, function(value) {
      return value === false;
    });

    var actual = lodashStable.map(falsey, function(value, index) {
      return index ? isBoolean(value) : isBoolean();
    });

    assert.deepStrictEqual(actual, expected);

    assert.strictEqual(isBoolean(args), false);
    assert.strictEqual(isBoolean([1, 2, 3]), false);
    assert.strictEqual(isBoolean(new Date), false);
    assert.strictEqual(isBoolean(new Error), false);
    assert.strictEqual(isBoolean(_), false);
    assert.strictEqual(isBoolean(slice), false);
    assert.strictEqual(isBoolean({ 'a': 1 }), false);
    assert.strictEqual(isBoolean(1), false);
    assert.strictEqual(isBoolean(/x/), false);
    assert.strictEqual(isBoolean('a'), false);
    assert.strictEqual(isBoolean(symbol), false);
  });

  it('should work with a boolean from another realm', function() {
    if (realm.boolean) {
      assert.strictEqual(isBoolean(realm.boolean), true);
    }
  });
});