Move /src/test to /tests

tests/ui/lint/lint-unknown-lint.rs

@@ -0,0 +1,13 @@
+#![deny(unknown_lints)]
+
+#![allow(not_a_real_lint)] //~ ERROR unknown lint
+
+#![deny(dead_cod)] //~ ERROR unknown lint
+                   //~| HELP did you mean
+                   //~| SUGGESTION dead_code
+
+#![deny(rust_2018_idiots)] //~ ERROR unknown lint
+                           //~| HELP did you mean
+                           //~| SUGGESTION rust_2018_idioms
+
+fn main() {}