test: Add unit test (#20)

test/unit/mocks/index.js

@@ -0,0 +1,24 @@
+const mockCourse = {
+  sys: { id: 'courseId' },
+  fields: {
+    title: 'Course title',
+    lessons: [
+      { sys: {id: 'lessonId'}, fields: { slug: 'lessonSlug', title: 'Lesson title' } }
+    ]
+  }
+}
+
+const mockCategory = {
+  sys: {
+    id: 'categoryId'
+  },
+  fields: {
+    slug: 'categorySlug',
+    title: 'categoryTitle'
+  }
+}
+
+module.exports = {
+  mockCourse,
+  mockCategory
+}