trying to internalize mib codegen

satrs-mib/codegen/tests/tests.rs

@@ -0,0 +1,7 @@
+#[test]
+fn tests() {
+    let t = trybuild::TestCases::new();
+    t.pass("tests/basic.rs");
+    t.pass("tests/verify_gen_struct.rs");
+    //t.pass("tests/group_in_enum.rs");
+}