Merge branch 'toTs' into toTypescript

jest.config.js

@@ -10,17 +10,18 @@
 module.exports = {
     displayName: 'Unit Tests',
     setupFilesAfterEnv: ['jest-extended', 'jest-chain'],
+    preset: "ts-jest",
     testMatch: [
-        '<rootDir>/test/plugin.js',
-        '<rootDir>/test/lib/rules/**/*.js',
-        '!**/test/lib/rules/shared.js'
+        '<rootDir>/test/plugin.ts',
+        '<rootDir>/test/lib/rules/**/*.ts',
+        '!**/test/lib/rules/shared.ts'
     ],
-    moduleFileExtensions: ['js', 'json'],
+    moduleFileExtensions: ['ts', 'js', 'json'],
     testResultsProcessor: 'jest-sonar-reporter',
     testPathIgnorePatterns: ['/node_modules/', '<rootDir>/lib/'],
     moduleDirectories: ['node_modules'],
     collectCoverage: true,
-    collectCoverageFrom: ['lib/**/*.js'],
+    collectCoverageFrom: ['lib/**/*.ts'],
     coverageDirectory: 'reports/coverage',
     reporters: [
         'default',

lib/rules/enforce-foo-bar.ts

@@ -0,0 +1,50 @@
+import { AST_NODE_TYPES, TSESLint } from '@typescript-eslint/utils';
+
+type MessageIds = 'messageIdForFooMustBeBar';
+
+const ruleEnforceFoorBar: TSESLint.RuleModule<MessageIds> = {
+    defaultOptions: [],
+    meta: {
+        type: 'problem',
+        messages: {
+            messageIdForFooMustBeBar: 'Value other than "bar" assigned to `const foo`. Unexpected value: {{ notBar }}.',
+        },
+        fixable: 'code',
+        schema: []
+    },
+    create: (context) => ({
+        VariableDeclarator: (node) => {
+            // Performs action in the function on every variable declarator
+            if (node.parent.type === AST_NODE_TYPES.VariableDeclaration) {
+                // Check if variable name is `foo`
+                if (node.id.type === AST_NODE_TYPES.Identifier && node.id.name === 'foo') {
+                    // Check if value of variable is "bar"
+                    if (
+                        node.init?.type === AST_NODE_TYPES.Literal &&
+                        node.init?.value !== 'bar'
+                    ) {
+                        /*
+                        * Report error to ESLint. Error message uses
+                        * a message placeholder to include the incorrect value
+                        * in the error message.
+                        * Also includes a `fix(fixer)` function that replaces
+                        * any values assigned to `const foo` with "bar".
+                        */
+                        context.report({
+                            node,
+                            messageId: 'messageIdForFooMustBeBar',
+                            data: {
+                                notBar: node.init.value
+                            },
+                            fix(fixer) {
+                                return fixer.replaceText(node.init!!, '"bar"');
+                            }
+                        });
+                    }
+                }
+            }
+        }
+    })
+}
+
+export default ruleEnforceFoorBar;