public void Derived()
{
//-------------------------------------------------------------
// Verify that [BaseModel] works.
var baseModel = new BaseModel();
Assert.Null(baseModel.ParentProperty);
baseModel.ParentProperty = "Hello World!";
Assert.Equal("Hello World!", baseModel.ParentProperty);
baseModel = BaseModel.CreateFrom(baseModel.ToString());
Assert.Equal("Hello World!", baseModel.ParentProperty);
//-------------------------------------------------------------
// Verify that [DerivedModel] works too.
var derivedModel = new DerivedModel();
Assert.Null(derivedModel.ParentProperty);
Assert.Null(derivedModel.ChildProperty);
derivedModel.ParentProperty = "parent";
derivedModel.ChildProperty = "child";
derivedModel = DerivedModel.CreateFrom(derivedModel.ToString());
Assert.Equal("parent", derivedModel.ParentProperty);
Assert.Equal("child", derivedModel.ChildProperty);
//-------------------------------------------------------------
// Verify Equals():
var value1 = new DerivedModel()
{
ParentProperty = "parent", ChildProperty = "child"
};
var value2 = new DerivedModel()
{
ParentProperty = "parent", ChildProperty = "child"
};
Assert.True(value1.Equals(value1));
Assert.True(value1.Equals(value2));
Assert.True(value2.Equals(value1));
Assert.False(value1.Equals(null));
Assert.False(value1.Equals("Hello World!"));
// Verify that a change to the parent class property is detected.
value1.ParentProperty = "DIFFERENT";
Assert.True(value1.Equals(value1));
Assert.False(value1.Equals(value2));
Assert.False(value2.Equals(value1));
Assert.False(value1.Equals(null));
Assert.False(value1.Equals("Hello World!"));
// Verify that a change to the derived class property is detected.
value1.ParentProperty = "parent";
value1.ChildProperty = "DIFFERENT";
Assert.True(value1.Equals(value1));
Assert.False(value1.Equals(value2));
Assert.False(value2.Equals(value1));
Assert.False(value1.Equals(null));
Assert.False(value1.Equals("Hello World!"));
//-------------------------------------------------------------
// Verify that we can use [ToDerived<TResult>()] to create a derived instance
// from the base type. This also exercises [RoundtripDataFactory] a bit.
derivedModel = new DerivedModel()
{
ParentProperty = "parent", ChildProperty = "child"
};
baseModel = BaseModel.CreateFrom(derivedModel.ToString());
Assert.Equal("parent", baseModel.ParentProperty);
derivedModel = baseModel.ToDerived <DerivedModel>();
Assert.Equal("parent", derivedModel.ParentProperty);
Assert.Equal("child", derivedModel.ChildProperty);
}