code coverage for visual regression tests

Author: penx

package.json

@@ -17,8 +17,9 @@
  "eject": "react-scripts eject",
  "storybook": "start-storybook -p 9009 -s public",
  "build-storybook": "build-storybook -s public",
- "coverage:cypress": "yarn cypress run",
- "coverage:unit": "cross-env CI=true react-scripts test --coverage"
+ "coverage:integration": "yarn cypress run",
+ "coverage:unit": "cross-env CI=true react-scripts test --coverage",
+ "coverage:visual-regression": "cross-env CI=true react-scripts test --coverage --testMatch=\"<rootDir>/src/storyshots/index.js\" -u"
  },
  "eslintConfig": {
  "extends": "react-app"
@@ -47,6 +48,7 @@
  "cross-env": "^7.0.2",
  "cypress": "^4.4.0",
  "istanbul-lib-coverage": "^3.0.0",
- "nyc": "^15.0.1"
+ "nyc": "^15.0.1",
+ "react-test-renderer": "^16.13.1"
  }
 }

src/storyshots/index.js

@@ -0,0 +1,3 @@
+import initStoryshots from '@storybook/addon-storyshots';
+ 
+initStoryshots();

yarn.lock

@@ -11929,7 +11929,7 @@ react-inspector@^4.0.0:
  is-dom "^1.0.9"
  prop-types "^15.6.1"
 
-react-is@^16.12.0, react-is@^16.7.0, react-is@^16.8.1, react-is@^16.8.4:
+react-is@^16.12.0, react-is@^16.7.0, react-is@^16.8.1, react-is@^16.8.4, react-is@^16.8.6:
  version "16.13.1"
  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.13.1.tgz#789729a4dc36de2999dc156dd6c1d9c18cea56a4"
  integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==
@@ -12041,6 +12041,16 @@ react-syntax-highlighter@^11.0.2:
  prismjs "^1.8.4"
  refractor "^2.4.1"
 
+react-test-renderer@^16.13.1:
+ version "16.13.1"
+ resolved "https://registry.yarnpkg.com/react-test-renderer/-/react-test-renderer-16.13.1.tgz#de25ea358d9012606de51e012d9742e7f0deabc1"
+ integrity sha512-Sn2VRyOK2YJJldOqoh8Tn/lWQ+ZiKhyZTPtaO0Q6yNj+QDbmRkVFap6pZPy3YQk8DScRDfyqm/KxKYP9gCMRiQ==
+ dependencies:
+ object-assign "^4.1.1"
+ prop-types "^15.6.2"
+ react-is "^16.8.6"
+ scheduler "^0.19.1"
+
 react-textarea-autosize@^7.1.0:
  version "7.1.2"
  resolved "https://registry.yarnpkg.com/react-textarea-autosize/-/react-textarea-autosize-7.1.2.tgz#70fdb333ef86bcca72717e25e623e90c336e2cda"