public void CanExecute()
{
var canExecuteRan = false;
var cmd = new DarkCommand(() => { }, () =>
{
canExecuteRan = true;
return(true);
});
Assert.True(cmd.CanExecute(null));
Assert.True(canExecuteRan);
}
public void GenericCanExecute()
{
string result = null;
var cmd = new DarkCommand <string>(s => { }, s =>
{
result = s;
return(true);
});
Assert.True(cmd.CanExecute("Foo"));
Assert.Equal("Foo", result);
}
public void CanExecuteIgnoresParameterIfValueTypeAndSetToNull()
{
var command = new DarkCommand <int>(context => { }, context => true);
Assert.Throws <InvalidCommandParameterException>(() => command.CanExecute(null));
}
public void CanExecuteUsesParameterIfNullableAndSetToNull()
{
var command = new DarkCommand <int?>(context => { }, context => true);
Assert.True(command.CanExecute(null), "null is a valid value for a Nullable<int> type");
}
public void CanExecuteUsesParameterIfReferenceTypeAndSetToNull()
{
var command = new DarkCommand <FakeChildContext>(context => { }, context => true);
Assert.True(command.CanExecute(null), "null is a valid value for a reference type");
}
public void CanExecuteReturnsFalseIfParameterIsWrongValueType()
{
var command = new DarkCommand <int>(context => { }, context => true);
Assert.Throws <InvalidCommandParameterException>(() => command.CanExecute(10.5));
}
public void CanExecuteReturnsFalseIfParameterIsWrongReferenceType()
{
var command = new DarkCommand <FakeChildContext>(context => { }, context => true);
Assert.Throws <InvalidCommandParameterException>(() => command.CanExecute(new FakeParentContext()));
}
public void Constructor()
{
var cmd = new DarkCommand(() => { });
Assert.True(cmd.CanExecute(null));
}
