public void TestOneTimeBinding()
{
var model = new ModelTestClass
{
Number = 1,
Text = "First"
};
var control = new ControlTestClass
{
Text = "Wrong",
Number = -1
};
var propInfo = typeof(ModelTestClass).GetProperty("Text");
var textProp = new BindableProperty<ControlTestClass, string>(control, o => o.Text, (o, action) => o.TextChanged += (sender, args) => action());
int controlCount = 0;
textProp.PropertyChanged += (sender, args) => controlCount++;
int modelCount = 0;
model.PropertyChanged += (sender, args) => modelCount ++;
Assert.Equal("Wrong", control.Text);
Assert.Equal("First", model.Text);
var binding = new BindingOneTime<ModelTestClass, ControlTestClass, string, string>(model, propInfo, o => o.Text, textProp, DataConverter<string>.EmptyConverter);
TestOneTimeBindingInfo(binding, model, control, ref modelCount, ref controlCount);
}
public void TestBinder()
{
var model = new ModelTestClass
{
Number = 1,
Text = "First"
};
var control = new ControlTestClass
{
Text = "Wrong",
Number = -1
};
var textProp = new BindableProperty<ControlTestClass, string>(control, o => o.Text, (o, action) => o.TextChanged += (sender, args) => action());
int[] controlCounts = { 0 };
textProp.PropertyChanged += (sender, args) => controlCounts[0]++;
int[] modelCounts = { 0 };
model.PropertyChanged += (sender, args) => modelCounts[0]++;
var binder = new Binder<ModelTestClass, ControlTestClass, string, string>(m => m.Text, () => DataConverter<string>.EmptyConverter);
var bInfo = binder.Bind(model, textProp, BindingMode.OneTime);
TestOneTimeBindingInfo(bInfo, model, control, ref modelCounts[0], ref controlCounts[0]);
bInfo.Unbind();
model.Text = "First";
modelCounts[0] = 0;
control.Text = "Wrong";
controlCounts[0] = 0;
textProp = new BindableProperty<ControlTestClass, string>(control, o => o.Text, (o, action) => o.TextChanged += (sender, args) => action());
bInfo = binder.Bind(model, textProp, BindingMode.OneWay);
TestOneWayBindingInfo(bInfo, model, control, ref modelCounts[0], ref controlCounts[0]);
bInfo.Unbind();
model.Text = "Wrong";
control.Text = "First";
modelCounts[0] = 0;
controlCounts[0] = 0;
textProp = new BindableProperty<ControlTestClass, string>(control, o => o.Text, (o, action) => o.TextChanged += (sender, args) => action());
bInfo = binder.Bind(model, textProp, BindingMode.OneWayToSource);
TestOneWayToSourceBindingInfo(bInfo, model, control, modelCounts, controlCounts);
bInfo.Unbind();
model.Text = "First";
modelCounts[0] = 0;
control.Text = "Wrong";
controlCounts[0] = 0;
textProp = new BindableProperty<ControlTestClass, string>(control, o => o.Text, (o, action) => o.TextChanged += (sender, args) => action());
bInfo = binder.Bind(model, textProp, BindingMode.TwoWay);
TestTwoWayBindingInfo(bInfo, model, control, ref modelCounts[0], ref controlCounts[0]);
bInfo.Unbind();
}
public void TestBindTo()
{
IPropertyBinder<ControlTestClass, string> binder = new PropertyBinder<ControlTestClass, string>(
z => z.Text,
(cls, action) => cls.TextChanged += (sender, args) => action());
var instance = new ControlTestClass { Text = "First" };
TestBindableProperty(instance, binder.BindTo(instance));
binder = new PropertyBinder<ControlTestClass, int, string>(
z => z.Number,
(cls, action) => cls.NumberChanged += (sender, args) => action(),
new DataConverter<int, string>(Helper.ToText, Helper.ToInt32));
instance = new ControlTestClass { Number = 1 };
var property = binder.BindTo(instance);
Assert.Equal("First", property.Value);
Assert.Equal(instance.Number.ToText(), property.Value);
instance.Number = 2;
Assert.Equal("Second", property.Value);
property.Value = "Third";
Assert.Equal("Third", instance.Number.ToText());
int numberChangedCount = 0;
int propertyChangedCount = 0;
instance.NumberChanged += (sender, args) => numberChangedCount++;
property.PropertyChanged += (sender, args) =>
{
Assert.Equal("Number", args.PropertyName);
propertyChangedCount++;
};
instance.Number = 4;
Assert.Equal(1, numberChangedCount);
Assert.Equal(1, propertyChangedCount);
property.Value = "Fifth";
Assert.Equal(2, numberChangedCount);
Assert.Equal(2, propertyChangedCount);
}
private static void TestTwoWayBindingInfo(IBindingInfo<ModelTestClass, ControlTestClass, string, string> binding, ModelTestClass model, ControlTestClass control, ref int modelCount, ref int controlCount)
{
Assert.Equal(BindingMode.TwoWay, binding.Direction);
Assert.Equal("First", control.Text);
Assert.Equal(1, controlCount);
Assert.Equal(0, modelCount);
model.Text = 2.ToText();
Assert.Equal(1, modelCount);
Assert.Equal(2, controlCount);
Assert.Equal("Second", control.Text);
binding.Model = null;
model.Text = 3.ToText();
Assert.Equal(2, modelCount);
binding.Model = model;
Assert.Equal("Third", control.Text);
Assert.Equal(3, controlCount);
control.Text = "Forth";
Assert.Equal(4, controlCount);
Assert.Equal(3, modelCount);
Assert.Equal("Forth", model.Text);
}
private static void TestOneWayToSourceBindingInfo(IBindingInfo<ModelTestClass, ControlTestClass, string, string> binding, ModelTestClass model, ControlTestClass control, int[] modelCounts, int[] controlCounts)
{
Assert.Equal(BindingMode.OneWayToSource, binding.Direction);
Assert.Equal("First", model.Text);
Assert.Equal(0, controlCounts[0]);
Assert.Equal(1, modelCounts[0]);
control.Text = 2.ToText();
Assert.Equal(2, modelCounts[0]);
Assert.Equal(1, controlCounts[0]);
Assert.Equal("Second", model.Text);
binding.Model = null;
control.Text = 3.ToText();
Assert.Equal(2, controlCounts[0]);
binding.Model = model;
Assert.Equal("Third", model.Text);
Assert.Equal(3, modelCounts[0]);
Assert.Equal(2, controlCounts[0]);
model.Text = "Forth";
Assert.Equal(4, modelCounts[0]);
Assert.Equal(2, controlCounts[0]);
}
public void TestCreate()
{
var instance = new ControlTestClass { Text = "First" };
var property = new BindableProperty<ControlTestClass, string>(
instance,
o => o.Text,
(o, action) => o.TextChanged += (sender, args) => action());
Assert.Equal("First", property.Value);
Assert.Equal(instance.Text, property.Value);
instance.Text = "Second";
Assert.Equal("Second", property.Value);
property.Value = "Third";
Assert.Equal("Third", instance.Text);
int textChangedCount = 0;
int propertyChangedCount = 0;
instance.TextChanged += (sender, args) => textChangedCount++;
property.PropertyChanged += (sender, args) =>
{
Assert.Equal("Text", args.PropertyName);
propertyChangedCount++;
};
instance.Text = "Forth";
Assert.Equal(1, textChangedCount);
Assert.Equal(1, propertyChangedCount);
property.Value = "Fifth";
Assert.Equal(2, textChangedCount);
Assert.Equal(2, propertyChangedCount);
instance = new ControlTestClass { Number = 1 };
property = new BindableProperty<ControlTestClass, string>(
instance,
"Text",
o => o.Number.ToText(),
(o, s) => o.Number = s.ToInt32(),
(o, action) => o.NumberChanged += (sender, args) => action());
Assert.Equal("First", property.Value);
Assert.Equal(instance.Number, property.Value.ToInt32());
instance.Number = 2;
Assert.Equal("Second", property.Value);
property.Value = "Third";
Assert.Equal("Third", instance.Number.ToText());
textChangedCount = 0;
propertyChangedCount = 0;
instance.NumberChanged += (sender, args) => textChangedCount++;
property.PropertyChanged += (sender, args) =>
{
Assert.Equal("Text", args.PropertyName);
propertyChangedCount++;
};
instance.Number = 4;
Assert.Equal(1, textChangedCount);
Assert.Equal(1, propertyChangedCount);
property.Value = "Fifth";
Assert.Equal(2, textChangedCount);
Assert.Equal(2, propertyChangedCount);
}
internal static void TestBindableProperty(ControlTestClass instance, IBindableProperty<ControlTestClass, string> property)
{
Assert.Equal("First", property.Value);
Assert.Equal(instance.Text, property.Value);
instance.Text = "Second";
Assert.Equal("Second", property.Value);
property.Value = "Third";
Assert.Equal( "Third", instance.Text);
int textChangedCount = 0;
int propertyChangedCount = 0;
instance.TextChanged += (sender, args) => textChangedCount++;
property.PropertyChanged += (sender, args) =>
{
Assert.Equal("Text", args.PropertyName);
propertyChangedCount++;
};
instance.Text = "Forth";
Assert.Equal(1, textChangedCount);
Assert.Equal(1, propertyChangedCount);
property.Value = "Fifth";
Assert.Equal(2, textChangedCount);
Assert.Equal(2, propertyChangedCount);
}