public void ThrowsExceptionOnBadInput()
{
var setVariable = new SetVariable();
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x 2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("= 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x.y = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x,y = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x-2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x+2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x/2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x*2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("x^2 = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("e = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("pi = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("ans = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("root = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("log = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("help = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("frac = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("calc = 1"));
Assert.Throws<CalculatorException>(() => setVariable.HandleInput("set = 1"));
}
/// <summary>
/// Initializes a new instance of the <see cref="InputHandler"/> class.
/// </summary>
public InputHandler()
{
_fraction = new Fraction();
_setVariable = new SetVariable();
_unsetVariable = new UnsetVariable();
_variables = new Variables();
_calculate = new Calculate();
_help = new Help();
}