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

    public function testJoiningWithDelimiter()
    {
        $instance = Collectors::joining(",");
        $instance->add("a", "b");
        $instance->add("foo", "bar");
        $instance->add(1, 2);
        $this->assertEquals("b,bar,2", $instance->get());
    }