public function testSquareSquare() { $square = new Square(); if ($square instanceof ISquarable) { $square->square(); } else { $this->assertTrue(false, 'Square must have square'); } }
public function testSquareSquare() { $square = new Square(); if ($square instanceof ISquarable) { $square->square(); } else { $this->assertTrue(false, 'Square must have square'); } }