setup testing

.codeclimate.yml

@@ -1,5 +0,0 @@
-version: "2"
-checks:
-  method-lines:
-      config:
-        threshold: 40

.eslintrc

@@ -11,6 +11,7 @@
   "env": {
     "browser": true,
     "node": true,
-    "es6": true
+    "es6": true,
+    "jest": true
   }
 }

.gitignore

@@ -1,3 +1,4 @@
 /*.js
 node_modules
 package-lock.json
+coverage

.npmignore

@@ -4,3 +4,5 @@ src
 .editorconfig
 .eslintrc
 .travis.yml
+coverage
+__tests__

.travis.yml

@@ -1,5 +1,17 @@
 language: node_js
 node_js: node
 
+before_script:
+  - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
+  - chmod +x ./cc-test-reporter
+  - ./cc-test-reporter before-build
+
+script:
+  - npm test
+  - npm run build
+
+after_script:
+  - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+
 notifications:
-    email: false
+  email: false

README.md

@@ -5,6 +5,7 @@
 [![npm package](https://img.shields.io/npm/v/gatsby-plugin-matomo.svg)](https://www.npmjs.com/package/gatsby-plugin-matomo)
 [![Build Status](https://travis-ci.com/kremalicious/gatsby-plugin-matomo.svg?branch=master)](https://travis-ci.com/kremalicious/gatsby-plugin-matomo)
 [![Maintainability](https://api.codeclimate.com/v1/badges/067339a02f2058f5ba01/maintainability)](https://codeclimate.com/github/kremalicious/gatsby-plugin-matomo/maintainability)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/067339a02f2058f5ba01/test_coverage)](https://codeclimate.com/github/kremalicious/gatsby-plugin-matomo/test_coverage)
 [![Greenkeeper badge](https://badges.greenkeeper.io/kremalicious/gatsby-plugin-matomo.svg)](https://greenkeeper.io/)
 
 > 🥂 Gatsby plugin to add Matomo (formerly Piwik) onto a site. https://kremalicious.com/gatsby-plugin-matomo/

package.json

@@ -4,9 +4,10 @@
   "version": "0.7.2",
   "author": "Matthias Kretschmann <m@kretschmann.io>",
   "scripts": {
-    "build": "babel src --out-dir . --ignore __tests__",
-    "start": "babel -w src --out-dir . --ignore __tests__",
-    "test": "eslint ./src/**/*.js",
+    "build": "babel src --out-dir . --ignore **/__tests__",
+    "start": "babel -w src --out-dir . --ignore **/__tests__",
+    "test": "npm run lint && jest --coverage",
+    "lint": "eslint ./src/**/*.js",
     "format": "prettier --write 'src/**/*.js'",
     "release": "release-it --non-interactive",
     "changelog": "auto-changelog -p",
@@ -16,13 +17,16 @@
   "devDependencies": {
     "@babel/cli": "^7.8.4",
     "@babel/core": "^7.8.4",
+    "@babel/runtime": "^7.8.4",
     "auto-changelog": "^1.16.2",
     "babel-preset-gatsby-package": "^0.2.16",
     "cross-env": "^7.0.0",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.10.0",
     "eslint-plugin-prettier": "^3.1.2",
+    "jest": "^25.1.0",
     "prettier": "^1.19.1",
+    "react": "^16.12.0",
     "release-it": "^12.4.3"
   },
   "homepage": "https://kremalicious.com/gatsby-plugin-matomo",
@@ -30,6 +34,7 @@
     "gatsby",
     "gatsby-plugin",
     "analytics",
+    "tracking",
     "matomo",
     "piwik"
   ],

src/__tests__/gatsby-browser.js

@@ -0,0 +1,66 @@
+import { onRouteUpdate } from '../gatsby-browser'
+
+describe('gatsby-plugin-matomo', () => {
+  describe('gatsby-browser', () => {
+    beforeEach(() => {
+      jest.useFakeTimers()
+      window._paq = { push: jest.fn() }
+    })
+
+    afterEach(() => {
+      jest.resetAllMocks()
+    })
+
+    describe('onRouteUpdate', () => {
+      describe('in non-production env', () => {
+        beforeAll(() => {
+          window._paq = { push: jest.fn() }
+        })
+
+        it('does not send page view', () => {
+          onRouteUpdate({})
+          expect(window._paq.push).not.toHaveBeenCalled()
+        })
+
+        it('sends page view in dev mode', () => {
+          window.dev = true
+          onRouteUpdate({})
+          expect(window._paq.push).toHaveBeenCalledTimes(1)
+        })
+      })
+
+      describe('in production env', () => {
+        let env
+
+        beforeAll(() => {
+          env = process.env.NODE_ENV
+          process.env.NODE_ENV = 'production'
+        })
+
+        afterAll(() => {
+          process.env.NODE_ENV = env
+        })
+
+        it('does not send page view when _paq is undefined', () => {
+          delete window._paq
+          onRouteUpdate({})
+          jest.runAllTimers()
+          expect(setTimeout).not.toHaveBeenCalled()
+        })
+
+        it('sends page view', () => {
+          onRouteUpdate({})
+          jest.runAllTimers()
+          expect(window._paq.push).toHaveBeenCalledTimes(5)
+        })
+
+        it('uses setTimeout with a minimum delay of 32ms', () => {
+          onRouteUpdate({})
+          jest.runAllTimers()
+          expect(setTimeout).toHaveBeenCalledWith(expect.any(Function), 32)
+          expect(window._paq.push).toHaveBeenCalledTimes(5)
+        })
+      })
+    })
+  })
+})

src/__tests__/gatsby-ssr.js

@@ -0,0 +1,74 @@
+import { onRenderBody } from '../gatsby-ssr'
+
+describe('gatsby-plugin-google-analytics', () => {
+  describe('gatsby-ssr', () => {
+    describe('onRenderBody', () => {
+      describe('in non-production env', () => {
+        it('does not set tracking script', () => {
+          const setHeadComponents = jest.fn()
+          onRenderBody({ setHeadComponents })
+          expect(setHeadComponents).not.toHaveBeenCalled()
+        })
+      })
+
+      describe('in production env', () => {
+        let env
+
+        beforeAll(() => {
+          env = process.env.NODE_ENV
+          process.env.NODE_ENV = 'production'
+        })
+
+        afterAll(() => {
+          process.env.NODE_ENV = env
+        })
+
+        const setup = options => {
+          const setHeadComponents = jest.fn()
+          const setPostBodyComponents = jest.fn()
+
+          options = Object.assign(
+            {
+              siteId: 'TEST_SITE_ID',
+              matomoUrl: 'TEST_MATOMO_URL',
+              siteUrl: 'TEST_SITE_URL'
+            },
+            options
+          )
+
+          onRenderBody({ setHeadComponents, setPostBodyComponents }, options)
+
+          return {
+            setHeadComponents,
+            setPostBodyComponents
+          }
+        }
+
+        it('sets tracking script', () => {
+          const { setHeadComponents, setPostBodyComponents } = setup()
+
+          expect(setHeadComponents).toHaveBeenCalledTimes(1)
+          expect(setPostBodyComponents).toHaveBeenCalledTimes(1)
+        })
+
+        it('sets siteId', () => {
+          const { setPostBodyComponents } = setup()
+          const result = JSON.stringify(setPostBodyComponents.mock.calls[0][0])
+          expect(result).toMatch(/TEST_SITE_ID/)
+        })
+
+        it('sets matomoUrl', () => {
+          const { setPostBodyComponents } = setup()
+          const result = JSON.stringify(setPostBodyComponents.mock.calls[0][0])
+          expect(result).toMatch(/TEST_MATOMO_URL/)
+        })
+
+        it('sets siteUrl', () => {
+          const { setPostBodyComponents } = setup()
+          const result = JSON.stringify(setPostBodyComponents.mock.calls[0][0])
+          expect(result).toMatch(/TEST_SITE_URL/)
+        })
+      })
+    })
+  })
+})

src/gatsby-browser.js

@@ -13,14 +13,11 @@ function getDuration() {
 }
 
 export const onRouteUpdate = ({ location, prevLocation }) => {
-  if (
-    (process.env.NODE_ENV === 'production' && typeof _paq !== 'undefined') ||
-    window.dev === true
-  ) {
-    const _paq = window._paq || []
-    const dev = window.dev || null
+  if (process.env.NODE_ENV === 'production' || window.dev === true) {
+    if (!window._paq) return
 
-    const url = location.pathname + location.search + location.hash
+    const { _paq, dev } = window
+    const url = location && location.pathname + location.search + location.hash
     const prevUrl =
       prevLocation &&
       prevLocation.pathname + prevLocation.search + prevLocation.hash
@@ -42,14 +39,9 @@ export const onRouteUpdate = ({ location, prevLocation }) => {
       }
     }
 
-    if ('requestAnimationFrame' in window) {
-      requestAnimationFrame(() => {
-        requestAnimationFrame(sendPageView)
-      })
-    } else {
-      // simulate 2 rAF calls
-      setTimeout(sendPageView, 32)
-    }
+    // Minimum delay for reactHelmet's requestAnimationFrame
+    const delay = Math.max(32, 0)
+    setTimeout(sendPageView, delay)
 
     if (first) {
       first = false

src/gatsby-ssr.js

@@ -71,19 +71,21 @@ export const onRenderBody = (
   { setHeadComponents, setPostBodyComponents, pathname },
   pluginOptions
 ) => {
-  const { exclude, dev } = pluginOptions
   const isProduction = process.env.NODE_ENV === 'production'
   let excludePaths = ['/offline-plugin-app-shell-fallback/']
 
-  if (typeof exclude !== 'undefined') {
-    exclude.map(exclude => {
+  if (pluginOptions && typeof pluginOptions.exclude !== 'undefined') {
+    pluginOptions.exclude.map(exclude => {
       excludePaths.push(exclude)
     })
   }
 
   const isPathExcluded = excludePaths.some(path => pathname === path)
 
-  if ((isProduction || dev === true) && !isPathExcluded) {
+  if (
+    (isProduction || (pluginOptions && pluginOptions.dev === true)) &&
+    !isPathExcluded
+  ) {
     setHeadComponents([buildHead(pluginOptions)])
     setPostBodyComponents([
       buildTrackingCode(pluginOptions),