Antlr4.Test.StringTemplate.TestImports.TestPolymorphicTemplateReference C# (CSharp) Метод

        public void TestPolymorphicTemplateReference()
        {
            string dir1 = Path.Combine(tmpdir, "d1");
            string b = "b() ::= <<dir1 b>>\n";
            writeFile(dir1, "b.st", b);
            string dir2 = Path.Combine(tmpdir, "d2");
            string a = "a() ::= << <b()> >>\n";
            b = "b() ::= <<dir2 b>>\n";
            writeFile(dir2, "a.st", a);
            writeFile(dir2, "b.st", b);

            TemplateGroup group1 = new TemplateGroupDirectory(dir1);
            TemplateGroup group2 = new TemplateGroupDirectory(dir2);
            group1.ImportTemplates(group2);

            // normal lookup; a created from dir2 calls dir2.b
            Template st = group2.GetInstanceOf("a");
            string expected = " dir2 b ";
            string result = st?.Render();
            Assert.AreEqual(expected, result);

            // polymorphic lookup; a created from dir1 calls dir2.a which calls dir1.b
            st = group1.GetInstanceOf("a");
            expected = " dir1 b ";
            result = st?.Render();
            Assert.AreEqual(expected, result);
        }