public void Test_AddDirective()
{
var x = _basic.AddDirective("System");
var locs = _basic.EmitLines();
Assert.AreEqual(_basic, x);
Assert.AreEqual(5, locs.Count);
Assert.AreEqual("using System;", locs[0]);
// add another of the same directive
_basic.AddDirective("System");
locs = _basic.EmitLines();
Assert.AreEqual(5, locs.Count, "Count has not increased...");
Assert.AreEqual("using System;", locs[0], "Only one directive is present");
}
