Move /src/test to /tests

tests/ui/uniform-paths/basic.rs

@@ -0,0 +1,33 @@
+// run-pass
+// edition:2018
+
+#![allow(unused_imports)]
+#![allow(non_camel_case_types)]
+
+// Test that ambiguity errors are not emitted between `self::test` and
+// `::test`, assuming the latter (crate) is not in `extern_prelude`.
+mod test {
+    pub struct Foo(pub ());
+}
+use test::Foo;
+
+// Test that qualified paths can refer to both the external crate and local item.
+mod std {
+    pub struct io(pub ());
+}
+use ::std::io as std_io;
+use self::std::io as local_io;
+
+fn main() {
+    Foo(());
+    let _ = std_io::stdout();
+    local_io(());
+
+    {
+        // Test that having `std_io` in a module scope and a non-module
+        // scope is allowed, when both resolve to the same definition.
+        use ::std::io as std_io;
+        use std_io::stdout;
+        let _ = stdout();
+    }
+}