add test for fake self

Author: csmoe

src/test/ui/self/suggest-self.rs

@@ -0,0 +1,38 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct Foo {
+    x: i32,
+}
+
+impl Foo {
+    fn foo(&self) -> i32 {
+        this.x
+        //~^ ERROR cannot find value `this` in this scope
+    }
+
+    fn bar(&self) -> i32 {
+        this.foo()
+        //~^ ERROR cannot find value `this` in this scope
+    }
+
+    fn baz(&self) -> i32 {
+        my.bar()
+        //~^ ERROR cannot find value `this` in this scope
+    }
+}
+
+fn main() {
+    let this = vec![1, 2, 3];
+    let my = vec![1, 2, 3];
+    let len = this.len();
+    let len = my.len();
+}
+