public void CreateAndExecuteTryCommand()
{
BindingEnvironment environment = new BindingEnvironment();
ICommand body = new SetCommand("a", new ConstantExpression(1));
TryCommand command = new TryCommand(body);
command.Execute(environment);
Assert.AreEqual(1, environment.GetValue("a"));
}
public void ExecuteFinallyEvenWhenRaiseException()
{
BindingEnvironment environment = new BindingEnvironment();
ICommand body = new SetCommand("a", new NameExpression("c"));
ICommand @finally = new SetCommand("b", new ConstantExpression(2));
TryCommand command = new TryCommand(body);
command.SetFinally(@finally);
try
{
command.Execute(environment);
Assert.Fail("Exception expected");
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(NameError));
Assert.AreEqual("name 'c' is not defined", ex.Message);
}
Assert.IsNull(environment.GetValue("a"));
Assert.AreEqual(2, environment.GetValue("b"));
}
private ICommand CompileTryCommand()
{
ICommand command = this.CompileSuite();
var trycommand = new TryCommand(command);
int indent = this.lexer.NextIndent();
while (indent == this.indent)
{
if (this.TryCompile(TokenType.Name, "finally"))
{
if (trycommand.Finally != null)
throw new SyntaxError("invalid syntax");
ICommand finallycommand = this.CompileSuite();
trycommand.SetFinally(finallycommand);
}
else
break;
indent = this.lexer.NextIndent();
}
this.lexer.PushIndent(indent);
return trycommand;
}