feat: drop support for ESLint v7

BREAKING CHANGE: dropped support for ESLint v7

Author: G-Rath

.github/workflows/nodejs.yml

@@ -73,15 +73,8 @@ jobs:
       fail-fast: false
       matrix:
         node-version: [18.x, 20.x, 22.x, 23.x, 24.x]
-        eslint-version: [7, 8, 9]
+        eslint-version: [8, 9]
         ts-eslint-plugin-version: [6, 7, 8]
-        exclude:
-          # ts-eslint/plugin@7 doesn't support eslint@7
-          - eslint-version: 7
-            ts-eslint-plugin-version: 7
-          # ts-eslint/plugin@8 doesn't support eslint@7
-          - eslint-version: 7
-            ts-eslint-plugin-version: 8
     runs-on: ubuntu-latest
 
     steps:

package.json

@@ -91,7 +91,7 @@
     "babel-jest": "^29.0.0",
     "babel-plugin-replace-ts-export-assignment": "^0.0.2",
     "dedent": "^1.5.0",
-    "eslint": "^7.0.0 || ^8.0.0",
+    "eslint": "^8.0.0",
     "eslint-config-prettier": "^10.0.0",
     "eslint-doc-generator": "^2.0.0",
     "eslint-plugin-eslint-plugin": "^6.0.0",
@@ -116,7 +116,7 @@
   },
   "peerDependencies": {
     "@typescript-eslint/eslint-plugin": "^6.0.0 || ^7.0.0 || ^8.0.0",
-    "eslint": "^7.0.0 || ^8.0.0 || ^9.0.0",
+    "eslint": "^8.0.0 || ^9.0.0",
     "jest": "*"
   },
   "peerDependenciesMeta": {

src/rules/__tests__/test-utils.ts

@@ -8,8 +8,7 @@ const eslintRequire = createRequire(require.resolve('eslint'));
 
 export const espreeParser = eslintRequire.resolve('espree');
 
-export const eslintMajorVersion = semver.major(eslintVersion);
-export const usingFlatConfig = eslintMajorVersion >= 9;
+export const usingFlatConfig = semver.major(eslintVersion) >= 9;
 
 export class FlatCompatRuleTester extends TSESLint.RuleTester {
   public constructor(testerConfig?: TSESLint.RuleTesterConfig) {
@@ -25,49 +24,11 @@ export class FlatCompatRuleTester extends TSESLint.RuleTester {
     tests: TSESLint.RunTests<TMessageIds, TOptions>,
   ) {
     super.run(ruleName, rule, {
-      valid: FlatCompatRuleTester._filterCases(
-        tests.valid.map(t => FlatCompatRuleTester._flatCompat(t)),
-      ),
-      invalid: FlatCompatRuleTester._filterCases(
-        tests.invalid.map(t => FlatCompatRuleTester._flatCompat(t)),
-      ),
+      valid: tests.valid.map(t => FlatCompatRuleTester._flatCompat(t)),
+      invalid: tests.invalid.map(t => FlatCompatRuleTester._flatCompat(t)),
     });
   }
 
-  /* istanbul ignore next */
-  /**
-   * Filters out test cases that are using ecma version 2022 or higher when running
-   * on ESLint v7
-   * @private
-   */
-  private static _filterCases<
-    T extends
-      | string
-      | TSESLint.ValidTestCase<unknown[]>
-      | TSESLint.InvalidTestCase<string, unknown[]>,
-  >(tests: T[]): T[] {
-    if (semver.major(eslintVersion) > 7) {
-      return tests;
-    }
-
-    const filtered = tests.filter(
-      t =>
-        typeof t === 'string' ||
-        !t.parserOptions?.ecmaVersion ||
-        t.parserOptions.ecmaVersion === 'latest' ||
-        t.parserOptions.ecmaVersion < 2022,
-    );
-
-    // print the number of tests that were filtered
-    if (filtered.length !== tests.length) {
-      console.warn(
-        `Filtered ${tests.length - filtered.length} tests due to unsupported parser options.`,
-      );
-    }
-
-    return filtered;
-  }
-
   /* istanbul ignore next */
   private static _flatCompat<
     T extends

yarn.lock

@@ -5159,7 +5159,7 @@ __metadata:
     babel-jest: ^29.0.0
     babel-plugin-replace-ts-export-assignment: ^0.0.2
     dedent: ^1.5.0
-    eslint: ^7.0.0 || ^8.0.0
+    eslint: ^8.0.0
     eslint-config-prettier: ^10.0.0
     eslint-doc-generator: ^2.0.0
     eslint-plugin-eslint-plugin: ^6.0.0
@@ -5183,7 +5183,7 @@ __metadata:
     typescript: ^5.0.4
   peerDependencies:
     "@typescript-eslint/eslint-plugin": ^6.0.0 || ^7.0.0 || ^8.0.0
-    eslint: ^7.0.0 || ^8.0.0 || ^9.0.0
+    eslint: ^8.0.0 || ^9.0.0
     jest: "*"
   peerDependenciesMeta:
     "@typescript-eslint/eslint-plugin":
@@ -5287,7 +5287,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint@npm:^7.0.0 || ^8.0.0":
+"eslint@npm:^8.0.0":
   version: 8.57.1
   resolution: "eslint@npm:8.57.1"
   dependencies: