public function testHours() { $ci = new Interval(0, 0, 0, 0, 1); $this->assertInstanceOfInterval($ci); $this->assertInterval($ci, 0, 0, 0, 1, 0, 0); $ci = Interval::hours(2); $this->assertInstanceOfInterval($ci); $this->assertInterval($ci, 0, 0, 0, 2, 0, 0); $ci = Interval::hour(); $this->assertInstanceOfInterval($ci); $this->assertInterval($ci, 0, 0, 0, 1, 0, 0); $ci = Interval::hour(3); $this->assertInstanceOfInterval($ci); $this->assertInterval($ci, 0, 0, 0, 3, 0, 0); }