feat: add jest mutation to eslint

Author: allohamora

src/categories/js/eslint/config/default.config.ts

@@ -1,4 +1,4 @@
-import { prettierMutation } from '../eslint.utils';
+import { jestMutation, prettierMutation } from '../eslint.utils';
 import { Config } from './config.interface';
 
 export const defaultConfig: Config = {
@@ -12,7 +12,6 @@ export const defaultConfig: Config = {
       es6: true,
       node: true,
       browser: true,
-      jest: true,
     },
     root: true,
     extends: ['eslint:recommended'],
@@ -21,5 +20,5 @@ export const defaultConfig: Config = {
     { name: 'lint', script: 'eslint "src/**/*.js"' },
     { name: 'lint:fix', script: 'eslint "src/**/*.js" --fix' },
   ],
-  mutations: [prettierMutation],
+  mutations: [prettierMutation, jestMutation],
 };

src/categories/js/eslint/config/node:ts.config.ts

@@ -1,4 +1,4 @@
-import { prettierMutation } from '../eslint.utils';
+import { jestMutation, prettierMutation } from '../eslint.utils';
 import { Config } from './config.interface';
 
 export const nodeTsConfig: Config = {
@@ -14,7 +14,6 @@ export const nodeTsConfig: Config = {
     root: true,
     env: {
       node: true,
-      jest: true,
     },
     ignorePatterns: ['.eslintrc.js'],
     rules: {
@@ -37,5 +36,5 @@ export const nodeTsConfig: Config = {
     { name: 'lint', script: 'eslint "src/**/*.ts"' },
     { name: 'lint:fix', script: 'eslint "src/**/*.ts" --fix' },
   ],
-  mutations: [prettierMutation],
+  mutations: [prettierMutation, jestMutation],
 };

src/categories/js/eslint/eslint.utils.ts

@@ -1,4 +1,5 @@
 import { isInstalledAndInRootCheck } from 'src/utils/installed';
+import { isJestInstalled } from '../jest/jest.utils';
 import { isPrettierInstalled } from '../prettier/prettier.utils';
 import { Config } from './config/config.interface';
 import { CONFIG_FILE_NAME, SCRIPT_NAME } from './eslint.const';
@@ -9,6 +10,12 @@ export const prettierMutation = async (config: Config) => {
   }
 };
 
+export const jestMutation = async (config: Config) => {
+  if (await isJestInstalled()) {
+    config.eslintConfig.env = { ...config.eslintConfig.env, jest: true };
+  }
+};
+
 const addPrettierToConfig = (config: Config) => {
   const dependenciesSet = new Set([...config.dependencies, 'eslint-plugin-prettier', 'eslint-config-prettier']);
   const dependencies = Array.from(dependenciesSet);