public async void Should_Coerce_Get_Null_Double_String_To_UnsetValue()
{
var data = new Class1 { StringValue = null };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(double));
var result = await target.Take(1);
Assert.Equal(AvaloniaProperty.UnsetValue, result);
}
public async void Getting_Invalid_Double_String_Should_Return_BindingError()
{
var data = new Class1 { StringValue = "foo" };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(double));
var result = await target.Take(1);
Assert.IsType<BindingNotification>(result);
}
public async void Should_Get_Simple_Property_Value()
{
var data = new Class1 { StringValue = "foo" };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(string));
var result = await target.Take(1);
Assert.Equal("foo", result);
}
public async void Should_Convert_Get_String_To_Double()
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.InvariantCulture;
var data = new Class1 { StringValue = "5.6" };
var target = new BindingExpression(new ExpressionObserver(data, "StringValue"), typeof(double));
var result = await target.Take(1);
Assert.Equal(5.6, result);
}
public async void Should_Convert_Get_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));
var result = await target.Take(1);
Assert.Equal((5.6).ToString(), result);
}
public async void Should_Return_BindingNotification_For_Invalid_FallbackValue_With_Data_Validation()
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.InvariantCulture;
var data = new Class1 { StringValue = "foo" };
var target = new BindingExpression(
new ExpressionObserver(data, "StringValue", true),
typeof(int),
"bar",
DefaultValueConverter.Instance);
var result = await target.Take(1);
Assert.Equal(
new BindingNotification(
new AggregateException(
new InvalidCastException("Could not convert 'foo' to 'System.Int32'"),
new InvalidCastException("Could not convert FallbackValue 'bar' to 'System.Int32'")),
BindingErrorType.Error),
result);
}
public async void Should_Return_BindingNotification_With_FallbackValue_For_NonConvertibe_Target_Value_With_Data_Validation()
{
Thread.CurrentThread.CurrentUICulture = CultureInfo.InvariantCulture;
var data = new Class1 { StringValue = "foo" };
var target = new BindingExpression(
new ExpressionObserver(data, "StringValue", true),
typeof(int),
42,
DefaultValueConverter.Instance);
var result = await target.Take(1);
Assert.Equal(
new BindingNotification(
new InvalidCastException("'foo' is not a valid number."),
BindingErrorType.Error,
42),
result);
}