🎨 ✅ add tests & refactor

- add test for getting all tags
- add test for transforming resources
- output.json -> mockOutput.json

test/mockOutput.json

@@ -0,0 +1,86 @@
+[
+  {
+    "title": "CSS",
+    "slug": "/css",
+    "resources": [
+      {
+        "title": "CSS Grid Generator",
+        "desc": "Visually create your css grid and export the code.",
+        "url": "https://cssgrid-generator.netlify.com/",
+        "tags": [
+          "generator",
+          "grid",
+          "layout",
+          "visual tool"
+        ],
+        "cleanTitle": "cssgridgenerator",
+        "path": "/css?card=cssgridgenerator"
+      },
+      {
+        "title": "Keyframes Editor",
+        "desc": "An insanely simple way to create CSS animations",
+        "url": "https://keyframes.app/editor/",
+        "tags": [
+          "generator",
+          "animation",
+          "visual tool"
+        ],
+        "cleanTitle": "keyframeseditor",
+        "path": "/css?card=keyframeseditor"
+      },
+      {
+        "title": "Flexbox Froggy",
+        "desc": "A game to learn Flexbox",
+        "url": "https://flexboxfroggy.com",
+        "tags": [
+          "educational",
+          "beginner"
+        ],
+        "cleanTitle": "flexboxfroggy",
+        "path": "/css?card=flexboxfroggy"
+      }
+    ]
+  },
+  {
+    "title": "Design",
+    "slug": "/design",
+    "resources": [
+      {
+        "title": "UX/UI Designer Roadmap 2017",
+        "desc": "Roadmap to becoming a UI/UX Designer in 2017",
+        "url": "https://github.com/togiberlin/ui-ux-designer-roadmap",
+        "tags": [
+          "career",
+          "ui",
+          "ux"
+        ],
+        "cleanTitle": "ux/uidesignerroadmap2017",
+        "path": "/design?card=ux/uidesignerroadmap2017"
+      },
+      {
+        "title": "Undraw",
+        "desc": "Free vector illustrations for your website.",
+        "url": "https://undraw.co",
+        "tags": [
+          "illustration",
+          "svg",
+          "ui"
+        ],
+        "cleanTitle": "undraw",
+        "path": "/design?card=undraw"
+      },
+      {
+        "title": "Practical UI tips",
+        "desc": "7 Tips to boost your UI design.",
+        "url": "https://medium.com/refactoring-ui/7-practical-tips-for-cheating-at-design-40c736799886",
+        "tags": [
+          "ui",
+          "tips",
+          "tricks"
+        ],
+        "cleanTitle": "practicaluitips",
+        "path": "/design?card=practicaluitips"
+      }
+    ]
+  }
+]