feat(eslint-config): move jest-dom rules to separate entry

Author: dangreen

packages/eslint-config/README.md

@@ -50,6 +50,7 @@ There are additional configs for specific language features:
 | @trigen/eslint-config/tsm | Rules for TS modules. |
 | @trigen/eslint-config/react | Rules for ReactJS code. |
 | @trigen/eslint-config/jest | Rules for Jest tests. |
+| @trigen/eslint-config/jest-dom | Rules for Jest DOM tests. |
 | @trigen/eslint-config/storybook | Rules for Storybook's stories. |
 | @trigen/eslint-config/typescript | Rules for TypeScript code. |
 | @trigen/eslint-config/typescript-requiring-type-checking | Rules for TypeScript code with type checking. |

packages/eslint-config/package.json

@@ -33,6 +33,7 @@
     "postpublish": "del ./package"
   },
   "peerDependencies": {
+    "@testing-library/dom": ">=8.0.0",
     "eslint": ">=7.0.0"
   },
   "dependencies": {

packages/eslint-config/src/jest-dom.js

@@ -0,0 +1,22 @@
+/**
+ * Jest DOM override
+ */
+const { makePatterns } = require('./utils')
+
+const postfixes = ['spec', 'mock']
+const extensions = [
+  'js',
+  'jsx',
+  'ts',
+  'tsx'
+]
+
+module.exports = {
+  overrides: [
+    {
+      files: makePatterns(postfixes, extensions),
+      plugins: ['jest-dom'],
+      extends: ['plugin:jest-dom/recommended']
+    }
+  ]
+}

packages/eslint-config/src/jest.js

@@ -15,12 +15,8 @@ module.exports = {
   overrides: [
     {
       files: makePatterns(postfixes, extensions),
-      plugins: [
-        'jest',
-        'testing-library',
-        'jest-dom'
-      ],
-      extends: ['plugin:testing-library/react', 'plugin:jest-dom/recommended'],
+      plugins: ['jest', 'testing-library'],
+      extends: ['plugin:testing-library/react'],
       env: {
         'jest/globals': true
       },

packages/eslint-config/src/rules/es6.js

@@ -93,7 +93,7 @@ module.exports = {
         allowParens: true
       }
     ],
-    'no-duplicate-imports': 'error',
+    'no-duplicate-imports': 'off', // in favor of import/no-duplicates
     'no-useless-computed-key': 'error',
     'no-useless-constructor': 'error',
     'no-useless-rename': 'error',