From ed65e2619a42aea7c375d0cbf81d337fffb11a46 Mon Sep 17 00:00:00 2001
From: Ville Penttinen <villem.penttinen@gmail.com>
Date: Thu, 4 Apr 2019 19:43:32 +0300
Subject: Add no parameter test to call_info

---
 crates/ra_ide_api/src/call_info.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'crates/ra_ide_api')

diff --git a/crates/ra_ide_api/src/call_info.rs b/crates/ra_ide_api/src/call_info.rs
index 3c53bd11a..1885d3da8 100644
--- a/crates/ra_ide_api/src/call_info.rs
+++ b/crates/ra_ide_api/src/call_info.rs
@@ -197,6 +197,25 @@ where T: Copy + Display,
         assert_eq!(info.active_parameter, Some(0));
     }
 
+    #[test]
+    fn test_fn_signature_no_params() {
+        let info = call_info(
+            r#"fn foo<T>() -> T where T: Copy + Display {}
+fn bar() { foo(<|>); }"#,
+        );
+
+        assert!(info.parameters().is_empty());
+        assert_eq!(
+            info.label(),
+            r#"
+fn foo<T>() -> T
+where T: Copy + Display
+    "#
+            .trim()
+        );
+        assert!(info.active_parameter.is_none());
+    }
+
     #[test]
     fn test_fn_signature_for_impl() {
         let info = call_info(
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