public static void TestSetPropertyValueChanged()
{
bool changed = false;
string value = null;
TestViewModel tvm = new TestViewModel();
tvm.BindPropertyChanged <string>("StringProperty", (v) => { value = v; changed = true; });
Assert.That(tvm.StringProperty, Is.Null);
tvm.StringProperty = "A string value";
Assert.That(tvm.StringProperty, Is.EqualTo("A string value"));
Assert.That(changed, Is.True);
Assert.That(value, Is.EqualTo("A string value"));
value = null;
changed = false;
tvm.StringProperty = "A string value";
Assert.That(tvm.StringProperty, Is.EqualTo("A string value"));
Assert.That(changed, Is.False);
Assert.That(value, Is.Null);
tvm.StringProperty = "Another string value";
Assert.That(tvm.StringProperty, Is.EqualTo("Another string value"));
Assert.That(changed, Is.True);
Assert.That(value, Is.EqualTo("Another string value"));
}
public static void TestValidationError()
{
TestViewModel tvm = new TestViewModel();
TestValidationErrorCode errorCode = TestValidationErrorCode.Unknown;
tvm.BindPropertyChanged <int>("ValidationError", (n) => { errorCode = (TestValidationErrorCode)n; });
tvm.StringProperty = "Error";
Assert.That(tvm.Error.Length, Is.GreaterThan(0));
Assert.That(errorCode, Is.EqualTo(TestValidationErrorCode.BadString));
Assert.That(tvm.ValidationError, Is.EqualTo((int)TestValidationErrorCode.BadString));
tvm.IntProperty = -100;
Assert.That(tvm.Error.Length, Is.GreaterThan(0));
Assert.That(errorCode, Is.EqualTo(TestValidationErrorCode.BadInt));
Assert.That(tvm.ValidationError, Is.EqualTo((int)TestValidationErrorCode.BadInt));
tvm.StringProperty = "";
tvm.IntProperty = 100;
Assert.That(tvm.Error.Length, Is.EqualTo(0));
}
