Add test for primitive search

Author: GuillaumeGomez

src/test/rustdoc-js/primitive.js

@@ -0,0 +1,25 @@
+// exact-check
+
+const QUERY = [
+    "i32",
+    "str",
+    "TotoIsSomewhere",
+];
+
+const EXPECTED = [
+    {
+        'in_args': [
+            { 'path': 'primitive', 'name': 'foo' },
+        ],
+    },
+    {
+        'returned': [
+            { 'path': 'primitive', 'name': 'foo' },
+        ],
+    },
+    {
+        'others': [],
+        'in_args': [],
+        'returned': [],
+    },
+];

src/test/rustdoc-js/primitive.rs

@@ -0,0 +1,5 @@
+pub fn foo(i: i32) -> &'static str {
+    "hello"
+}
+
+pub fn foo2<TotoIsSomewhere>(i: &TotoIsSomewhere, j: TotoIsSomewhere) {}