public function testPoint1DEquals() { $point1D = new Point1D(1); $this->assertTrue($point1D->equals($point1D)); $this->assertFalse($point1D->equals(new Point1D(1))); $this->assertFalse($point1D->equals(new Point1D(80))); $this->assertTrue($point1D->equals($point1D->move(-30))); }