Add tests for struct variant field in search

src/test/rustdoc-js/struct-like-variant.js

@@ -0,0 +1,7 @@
+const QUERY = 'name';
+
+const EXPECTED = {
+    'others': [
+        { 'path': 'struct_like_variant::Enum::Bar', 'name': 'name', 'desc': 'This is a name.' },
+    ],
+};

src/test/rustdoc-js/struct-like-variant.rs

@@ -0,0 +1,8 @@
+#![crate_name = "struct_like_variant"]
+
+pub enum Enum {
+    Bar {
+        /// This is a name.
+        name: String
+    }
+}