feat(tests): more tests for comments

Author: littledivy

testing/fixtures.js

@@ -1,4 +1,5 @@
 export const comment = [
+  // Test with comments
   {
     css: "/* body { color: black; } */",
     ast: {
@@ -11,4 +12,23 @@ export const comment = [
       },
     },
   },
+  // Test with no comments
+  {
+    css: "body { color: black; }",
+    ast: {
+      type: "stylesheet",
+      stylesheet: {
+        rules: [{
+          type: "rule",
+          selectors: ["body"],
+          declarations: [
+            {
+              name: "color",
+              type: "property",
+            },
+          ],
+        }],
+      },
+    },
+  },
 ];