feat(packages/lint-repository-sui): Add jest adoption rule to lint

packages/lint-repository-sui/src/index.js

@@ -11,6 +11,7 @@ const TSvsJS = require('./rules/ts-vs-js-files.js')
 const Sass = require('./rules/sass-files.js')
 const Spark = require('./rules/spark-adoption.js')
 const ComponentsLocation = require('./rules/components-location.js')
+const JestAdoption = require('./rules/jest-adoption.js')
 
 // ------------------------------------------------------------------------------
 // Plugin Definition
@@ -31,6 +32,7 @@ module.exports = {
     'ts-vs-js-files': TSvsJS,
     'sass-files': Sass,
     'spark-adoption': Spark,
-    'components-location': ComponentsLocation
+    'components-location': ComponentsLocation,
+    'jest-adoption': JestAdoption
   }
 }

packages/lint-repository-sui/src/rules/jest-adoption.js

@@ -0,0 +1,45 @@
+const dedent = require('string-dedent')
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'This metric reports the number component that use Jest',
+      recommended: true,
+      url: null
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      percentage: dedent`
+        Currently, {{percentage}}% of your components use Jest. We have {{totalKarmaTests}}% tests in Karma and {{totalJestTests}}% in Jest
+      `
+    }
+  },
+
+  create: function (context) {
+    return {
+      'components/**/(test|__tests__)/*.(j|t)s(x)?': matches => {
+        const totalTests = matches.length
+        const totalJestTests = matches.filter(({fullPath}) => fullPath.includes('__tests__')).length
+        const totalKarmaTests = totalTests - totalJestTests
+        let percentage = (totalJestTests * 100) / totalTests
+        percentage = Math.round((percentage + Number.EPSILON) * 100) / 100
+
+        context.report({
+          messageId: 'percentage',
+          data: {percentage, totalKarmaTests, totalJestTests}
+        })
+        return context.monitoring(percentage)
+      },
+
+      missmatch: key => {
+        context.report({
+          messageId: 'percentage',
+          data: {percentage: 0}
+        })
+        context.monitoring(0)
+      }
+    }
+  }
+}