public void CanExecute()
{
var fake = new FakeInpc {
Prop1 = false
};
var observable = fake.ToObservable(x => x.Prop1);
var condition = new Condition(observable, () => fake.Prop1);
var command = new ConditionRelayCommand(_ => { }, condition, false);
Assert.IsFalse(command.CanExecute(null));
fake.Prop1 = true;
Assert.IsTrue(command.CanExecute(null));
}
public void NotifiesOnConditionChanged()
{
int count = 0;
var fake = new Fake {
IsTrue = false
};
var observable = fake.ObservePropertyChanged(x => x.IsTrue);
var condition = new Condition(observable, () => fake.IsTrue);
var command = new ConditionRelayCommand(() => { }, condition);
command.CanExecuteChanged += (sender, args) => count++;
Assert.AreEqual(0, count);
Assert.IsFalse(command.CanExecute());
fake.IsTrue = true;
Assert.AreEqual(1, count);
Assert.IsTrue(command.CanExecute());
}
public async Task NotifiesOnConditionChanged()
{
var count = 0;
var fake = new Fake {
IsTrue = false
};
using var condition = new Condition(fake.ObservePropertyChangedSlim(x => x.IsTrue), () => fake.IsTrue);
using var command = new ConditionRelayCommand(() => { }, condition);
command.CanExecuteChanged += (sender, args) => count++;
Assert.AreEqual(0, count);
Assert.IsFalse(command.CanExecute());
fake.IsTrue = true;
await Application.Current.Dispatcher.SimulateYield();
Assert.AreEqual(1, count);
Assert.IsTrue(command.CanExecute());
}
public void CanExecute(bool expected)
{
var fake = new Fake {
IsTrue = false
};
using var condition = new Condition(fake.ObservePropertyChangedSlim(x => x.IsTrue), () => fake.IsTrue);
using var command = new ConditionRelayCommand(() => { }, condition);
fake.IsTrue = expected;
Assert.AreEqual(expected, command.CanExecute());
}
public void CanExecute(bool expected)
{
var fake = new Fake {
IsTrueOrNull = false
};
using (var condition = new Condition(fake.ObservePropertyChanged(x => x.IsTrueOrNull), () => fake.IsTrueOrNull))
{
using (var command = new ConditionRelayCommand <int>(x => { }, condition))
{
fake.IsTrueOrNull = expected;
Assert.AreEqual(expected, command.CanExecute(0));
}
}
}
public void CanExecute(bool expected)
{
_fake.IsTrueOrNull = expected;
Assert.AreEqual(expected, _command.CanExecute());
}