more tests for type-of

tests/meta.rs

@@ -167,6 +167,21 @@ test!(
     "a {\n  color: type-of(hi + bye)\n}\n",
     "a {\n  color: string;\n}\n"
 );
+test!(
+    type_of_map,
+    "a {\n  color: type-of((a: b, c: d))\n}\n",
+    "a {\n  color: map;\n}\n"
+);
+test!(
+    type_of_parens,
+    "a {\n  color: type-of(((a)))\n}\n",
+    "a {\n  color: string;\n}\n"
+);
+test!(
+    type_of_unary_op,
+    "a {\n  color: type-of(- 2)\n}\n",
+    "a {\n  color: number;\n}\n"
+);
 test!(
     type_of_arglist,
     "@mixin foo($a...) {color: type-of($a);}\na {@include foo(1, 2, 3, 4, 5);}",