iter\IterTest::testIsIterable PHP Method

    public function testIsIterable()
    {
        $this->assertTrue(isIterable([]));
        $this->assertTrue(isIterable([1, 2, 3]));
        $this->assertTrue(isIterable(new \ArrayIterator([1, 2, 3])));
        $gen = function () {
            yield;
        };
        $this->assertTrue(isIterable($gen()));
        $this->assertFalse(isIterable(new \stdClass()));
        $this->assertFalse(isIterable("foobar"));
        $this->assertFalse(isIterable(123));
    }