phpstreams\tests\unit\CollectorsTest::testAveraging PHP Method

    public function testAveraging()
    {
        $instance = Collectors::averaging();
        $instance->add("a", 6);
        $instance->add("b", 9);
        $instance->add("21", 4);
        $instance->add("foo", 21);
        $this->assertEquals(10, $instance->get());
    }