import assert from 'assert';
import { MAX_SAFE_INTEGER } from './utils.js';
import _isIterateeCall from '../.internal/isIterateeCall.js';

describe('isIterateeCall', function() {
  var array = [1],
      func = _isIterateeCall,
      object =  { 'a': 1 };

  it('should return `true` for iteratee calls', function() {
    function Foo() {}
    Foo.prototype.a = 1;

    if (func) {
      assert.strictEqual(func(1, 0, array), true);
      assert.strictEqual(func(1, 'a', object), true);
      assert.strictEqual(func(1, 'a', new Foo), true);
    }
  });

  it('should return `false` for non-iteratee calls', function() {
    if (func) {
      assert.strictEqual(func(2, 0, array), false);
      assert.strictEqual(func(1, 1.1, array), false);
      assert.strictEqual(func(1, 0, { 'length': MAX_SAFE_INTEGER + 1 }), false);
      assert.strictEqual(func(1, 'b', object), false);
    }
  });

  it('should work with `NaN` values', function() {
    if (func) {
      assert.strictEqual(func(NaN, 0, [NaN]), true);
      assert.strictEqual(func(NaN, 'a', { 'a': NaN }), true);
    }
  });

  it('should not error when `index` is an object without a `toString` method', function() {
    if (func) {
      try {
        var actual = func(1, { 'toString': null }, [1]);
      } catch (e) {
        var message = e.message;
      }
      assert.strictEqual(actual, false, message || '');
    }
  });
});