Add test for fn-like search

Author: GuillaumeGomez

src/test/rustdoc-js/primitive-fn-like-search.js

@@ -0,0 +1,13 @@
+// exact-check
+const QUERY = 'u32 -> u32';
+
+const EXPECTED = {
+    'others': [
+    ],
+    'returned': [
+        { 'path': 'primitive_fn_like_search', 'name': 'foo' },
+    ],
+    'in_args': [
+        { 'path': 'primitive_fn_like_search', 'name': 'foo' },
+    ],
+};

src/test/rustdoc-js/primitive-fn-like-search.rs

@@ -0,0 +1,5 @@
+pub struct Foo;
+
+pub trait Bar {}
+
+pub fn foo<T: Bar, D: ::std::fmt::Debug>(a: Foo, b: u32, c: T, d: D) -> u32 {0}