public void WHEN_ViewModel_Is_Null_SHOULD_Throw_ArgumentNullException()
{
// Arrange
var propertyInfo = typeof(TestViewModel).GetProperty("StringProperty");
var sut = new InstancePropertyMetadata(propertyInfo);
// Act
Action action = () => sut.SetValue(null, "test");
// Assert
action.ShouldThrow <ArgumentNullException>();
}
public void WHEN_Value_Is_Null_And_Property_Is_Value_Type_SHOULD_Skip()
{
// Arrange
var propertyInfo = typeof(TestViewModel).GetProperty("IntProperty");
var sut = new InstancePropertyMetadata(propertyInfo);
var viewModel = new TestViewModel();
// Act
sut.SetValue(viewModel, null);
// Assert
viewModel.IntProperty.Should().Be(default(int));
}
public void WHEN_Value_Is_Null_And_Property_Is_Reference_Type_SHOULD_Pass()
{
// Arrange
var propertyInfo = typeof(TestViewModel).GetProperty("StringProperty");
var sut = new InstancePropertyMetadata(propertyInfo);
var viewModel = new TestViewModel();
// Act
sut.SetValue(viewModel, null);
// Assert
viewModel.StringProperty.Should().Be(null);
}
public void WHEN_ViewModel_And_Value_Are_Valid_SHOULD_Pass()
{
// Arrange
var expectedPropertyValue = GetRandom.String(20);
var propertyInfo = typeof(TestViewModel).GetProperty("StringProperty");
var sut = new InstancePropertyMetadata(propertyInfo);
var viewModel = new TestViewModel();
// Act
sut.SetValue(viewModel, expectedPropertyValue);
// Assert
viewModel.StringProperty.Should().Be(expectedPropertyValue);
}