From eb969647561f46c783469469284538ed95d77076 Mon Sep 17 00:00:00 2001
From: Charles Lew <crlf0710@gmail.com>
Date: Thu, 17 Sep 2020 00:21:34 +0800
Subject: Add a test.

---
 crates/hir_ty/src/tests/method_resolution.rs | 38 ++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'crates')

diff --git a/crates/hir_ty/src/tests/method_resolution.rs b/crates/hir_ty/src/tests/method_resolution.rs
index 23b2601e6..690f9d66e 100644
--- a/crates/hir_ty/src/tests/method_resolution.rs
+++ b/crates/hir_ty/src/tests/method_resolution.rs
@@ -1051,3 +1051,41 @@ fn dyn_trait_super_trait_not_in_scope() {
         "#]],
     );
 }
+
+#[test]
+fn method_resolution_foreign_opaque_type() {
+    check_infer(
+        r#"
+        extern "C" {
+            type S;
+            fn f() -> &'static S;
+        }
+
+        impl S {
+            fn foo(&self) -> bool {
+                true
+            }
+        }
+
+        fn test() {
+            let s = unsafe { f() };
+            s.foo();
+        }
+        "#,
+        // FIXME: 's.foo()' should be `bool`.
+        expect![[r#"
+            75..79 'self': &S
+            89..109 '{     ...     }': bool
+            99..103 'true': bool
+            123..167 '{     ...o(); }': ()
+            133..134 's': &S
+            137..151 'unsafe { f() }': &S
+            144..151 '{ f() }': &S
+            146..147 'f': fn f() -> &S
+            146..149 'f()': &S
+            157..158 's': &S
+            157..164 's.foo()': {unknown}
+        "#]],
+    );
+}
+
-- 
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