public void set_if_none_will_write_if_no_previous_value()
{
var substitutions = new Substitutions();
substitutions.SetIfNone("key", "different");
substitutions.ValueFor("key").ShouldEqual("different");
}
public void set_if_none_will_not_override_if_it_exists()
{
var substitutions = new Substitutions();
substitutions.Set("key", "something");
substitutions.SetIfNone("key", "different");
substitutions.ValueFor("key").ShouldEqual("something");
}