Move /src/test to /tests

tests/rustdoc-ui/display-output.rs

@@ -0,0 +1,15 @@
+// Test that `--show-output` has an effect and `allow(unused)` can be overridden.
+
+// check-pass
+// edition:2018
+// compile-flags:--test --test-args=--show-output
+// normalize-stdout-test: "src/test/rustdoc-ui" -> "$$DIR"
+// normalize-stdout-test "finished in \d+\.\d+s" -> "finished in $$TIME"
+
+/// ```
+/// #![warn(unused)]
+/// let x = 12;
+///
+/// fn foo(x: &dyn std::fmt::Display) {}
+/// ```
+pub fn foo() {}