public void Should_Set_Simple_Property_Value()
{
var data = new Class1 { StringValue = "foo" };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(string));
target.OnNext("bar");
Assert.Equal("bar", data.StringValue);
}
public void Should_Convert_Set_String_To_Double()
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.InvariantCulture;
var data = new Class1 { StringValue = (5.6).ToString() };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(double));
target.OnNext(6.7);
Assert.Equal((6.7).ToString(), data.StringValue);
}
public void Should_Convert_Set_Double_To_String()
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.InvariantCulture;
var data = new Class1 { DoubleValue = 5.6 };
var target = new BindingExpression(new ExpressionObserver(data, "DoubleValue"), typeof(string));
target.OnNext("6.7");
Assert.Equal(6.7, data.DoubleValue);
}
public void Should_Handle_DataValidation()
{
var data = new Class1 { DoubleValue = 5.6 };
var converter = new Mock<IValueConverter>();
var target = new BindingExpression(new ExpressionObserver(data, "DoubleValue", true), typeof(string));
var result = new List<object>();
target.Subscribe(x => result.Add(x));
target.OnNext(1.2);
target.OnNext("3.4");
target.OnNext("bar");
Assert.Equal(
new[]
{
new BindingNotification("5.6"),
new BindingNotification("1.2"),
new BindingNotification("3.4"),
new BindingNotification(
new InvalidCastException("'bar' is not a valid number."),
BindingErrorType.Error)
},
result);
}
public void Should_Pass_ConverterParameter_To_ConvertBack()
{
var data = new Class1 { DoubleValue = 5.6 };
var converter = new Mock<IValueConverter>();
var target = new BindingExpression(
new ExpressionObserver(data, "DoubleValue"),
typeof(string),
converter.Object,
converterParameter: "foo");
target.OnNext("bar");
converter.Verify(x => x.ConvertBack("bar", typeof(double), "foo", CultureInfo.CurrentUICulture));
}
public void Should_Coerce_Setting_UnsetValue_Double_To_Default_Value()
{
var data = new Class1 { DoubleValue = 5.6 };
var target = new BindingExpression(new ExpressionObserver(data, "DoubleValue"), typeof(string));
target.OnNext(AvaloniaProperty.UnsetValue);
Assert.Equal(0, data.DoubleValue);
}
public void Setting_Invalid_Double_String_Should_Use_FallbackValue()
{
var data = new Class1 { DoubleValue = 5.6 };
var target = new BindingExpression(
new ExpressionObserver(data, "DoubleValue"),
typeof(string),
"9.8",
DefaultValueConverter.Instance);
target.OnNext("foo");
Assert.Equal(9.8, data.DoubleValue);
}
public void Setting_Invalid_Double_String_Should_Not_Change_Target()
{
var data = new Class1 { DoubleValue = 5.6 };
var target = new BindingExpression(new ExpressionObserver(data, "DoubleValue"), typeof(string));
target.OnNext("foo");
Assert.Equal(5.6, data.DoubleValue);
}