public void Get_WhenValuePresent_CanReturnValue()
{
IObject obj = new IntegerObject(5);
var subject = new RuntimeEnvironment();
subject.Set("a", obj);
Assert.Equal(obj, subject.Get("a"));
}
public void Get_WhenValueNotPresent_ReturnsNull()
{
var subject = new RuntimeEnvironment();
subject = subject.Extend();
subject = subject.Extend();
Assert.Null(subject.Get("a"));
}
public void Get_WhenValueIsNotPresent_SearchesParents()
{
IObject obj = new IntegerObject(5);
var subject = new RuntimeEnvironment();
subject.Set("a", obj);
subject = subject.Extend();
subject = subject.Extend();
Assert.Equal(obj, subject.Get("a"));
}
public void Get_WhenShadowingOuterValue_ReturnsCorrectValue()
{
IObject obj = new IntegerObject(10);
var subject = new RuntimeEnvironment();
subject.Set("a", new IntegerObject(5));
subject = subject.Extend();
subject = subject.Extend();
subject.Set("a", obj);
Assert.Equal(obj, subject.Get("a"));
}