public void ReadOnlyIsCached()
{
var features1 = new FeatureCollection();
var features2 = features1.AsReadOnly();
var features3 = features1.AsReadOnly();
Assert.False(features1.IsReadOnly);
Assert.NotSame(features1, features2);
Assert.Same(features2, features3);
Assert.True(features2.IsReadOnly);
}
public void ReadOnlyConversion()
{
var features1 = new FeatureCollection();
var feature1 = new Feature();
features1.Set(feature1);
var features2 = features1.AsReadOnly();
Assert.Throws <NotSupportedException>(() => features2.Set(feature1));
Assert.Same(feature1, features2.Get <Feature>());
}