public function testSubtractsNumbers()
{
$subtraction = new Subtraction();
$result = $subtraction->run(5, 10);
$this->assertSame(5, $result);
}
public function testFindsTheDifferenceOfNumbers()
{
$subtraction = new Subtraction();
$difference = $subtraction->run(5, 0);
$this->assertEquals(-5, $difference);
}
public function testCalculate()
{
$sub = new Subtraction();
$this->assertEquals(3, $sub->calculate(4, 1));
$this->assertEquals(-1, $sub->calculate(4, 5));
}
