public void Execute_NotBoolExpr_ThrowsSyntaxExpression()
{
var context = new Mock <IContext>();
var expr = new Mock <IExpression>();
var stmt = new Mock <IStatement>();
expr.Setup(e => e.Interpret(It.IsAny <IContext>()))
.Returns(new Value(ValueTypes.Int, 12));
var subject = new While(expr.Object, stmt.Object);
Assert.That(() => subject.Execute(context.Object),
Throws.InstanceOf <SyntaxException>());
}
public void CalculateWhileTest()
{
var parameters = new ExpressionParameters();
parameters.Variables.Add(new Parameter("x", 0));
var body = new Define(Variable.X, new Add(Variable.X, new Number(2)));
var cond = new LessThan(Variable.X, new Number(10));
var @while = new While(body, cond);
@while.Execute(parameters);
Assert.Equal(10.0, parameters.Variables["x"]);
}
public void Execute_FalseExpr_ExecutesZeroTimes()
{
int wasCalled = 0;
var context = new Mock <IContext>();
var expr = new Mock <IExpression>();
var stmt = new Mock <IStatement>();
expr.Setup(e => e.Interpret(It.IsAny <IContext>()))
.Returns(new Value(ValueTypes.Bool, false));
stmt.Setup(s => s.Execute(It.IsAny <IContext>())).Callback(() => wasCalled++);
var subject = new While(expr.Object, stmt.Object);
subject.Execute(context.Object);
Assert.That(wasCalled, Is.EqualTo(0));
}