public function testItCanCalculateVolume()
{
$square = new Cube(0);
$this->assertEquals(0, $square->volume());
$square = new Cube(2);
$this->assertEquals(8, $square->volume());
$square = new Cube(3.14);
$this->assertEquals(30.959144, $square->volume());
}
/**
* Input a value that serves as the length of 1 side
* of a cube and returns the volume.
*
* @covers Cube::volume
*/
public function testCubeVolumeComputationIsCorrect()
{
//Set a mock value for the cube's length of side.
//and compute the volume based on the
//volume math formula for a cube.
$length_of_side = 20;
$volume = pow($length_of_side, 3);
$this->assertEquals($this->cube->volume(), $volume);
}
