public CalculatorFeature()
{
var calculator = new Calculator();
comment = @"
as a math idiot
I want to use a calculator
so I don't make mistakes with simple arithmetic
";
Scenario["Addition"] = () =>
{
Given["I have pressed clear"] = () => calculator.Clear();
When["I key in two"] = () => calculator.Key(2);
When["I add three"] = () => calculator.Add(3);
Then["the total is five"] = () => calculator.Total.ShouldEqual(5);
Then["the equation history is:"] = () => log(calculator.Equation.ShouldEqual("2 + 3"));
};
Scenario["Division"] = () =>
{
Given["I have pressed clear"] = () => calculator.Clear();
When["I key in twelve"] = () => calculator.Key(12);
When["I divide by four"] = () => calculator.Divide(4);
Then["the total is three"] = () => calculator.Total.ShouldEqual(3);
Then["the equation history is:"] = () => log(calculator.Equation.ShouldEqual("12 / 4"));
};
}
public CalculatorSpecification()
{
var calculator = new Calculator();
before_each = () => calculator.Clear();
describe["Addition"] = () =>
{
context["adding two and three"] = () =>
{
before = () => calculator.Key(2).Add(3);
it["sets the total to five"] = () =>
{
calculator.Total.ShouldEqual(5);
};
it["sets the equation history to:"] = () =>
{
log(calculator.Equation.ShouldEqual("2 + 3"));
};
};
context["adding two, three and four"] = () =>
{
before = () => calculator.Key(2).Add(3).Add(4);
it["sets the total to nine"] = () =>
{
calculator.Total.ShouldEqual(9);
};
it["sets the equation history to:"] = () =>
{
log(calculator.Equation.ShouldEqual("2 + 3 + 4"));
};
};
};
describe["Division"] = () =>
{
context["dividing four from twelve"] = () =>
{
before = () => calculator.Key(12).Divide(4);
it["sets the total three"] = () =>
{
calculator.Total.ShouldEqual(3);
};
it["sets the equation history to:"] = () =>
{
log(calculator.Equation.ShouldEqual("12 / 4"));
};
};
context["dividing by zero"] = () =>
{
it["explodes 💣💥☠️"] = () =>
{
Catch(() => calculator.Key(2).Divide(0)).ShouldBeOfExactType<DivideByZeroException>();
};
};
};
}