window(every: 20s) '; $this->assertEquals($query, $expression->__toString()); } public function testAllParameters() { $expression = new Window('20s', 'every', '0s', 'location', '_time', '_start', '_stop', true); $query = '|> window(every: 20s, period: every, offset: 0s, location: "location", ' . 'timeColumn: "_time", startColumn: "_start", stopColumn: "_stop", createEmpty: true) '; $this->assertEquals($query, $expression->__toString()); } }