fix: unit test

Author: foryuki

tests/__snapshots__/main.test.js.snap

@@ -21,16 +21,17 @@ Array [
   "examples/package.json",
   "examples/public/.gitkeep",
   "examples/stories/index.story.tsx",
+  "examples/stories/styles.scss",
   "greenkeeper.json",
   "jest.config.js",
   "package.json",
   "readme.md",
-  "src/Hello.tsx",
-  "src/a.ts",
+  "src/Sample.tsx",
   "src/index.ts",
   "src/styles.scss",
-  "tests/Hello.test.tsx",
-  "tests/a.test.ts",
+  "tests/Sample.test.tsx",
+  "tests/__mocks__/fileMock.js",
+  "tests/__mocks__/styleMock.js",
   "tests/setup.ts",
   "tsconfig.json",
   "tslint.json",