chore: lint tool files, add editorconfig, update devDeps.

.editorconfig

@@ -0,0 +1,15 @@
+; EditorConfig file: https://EditorConfig.org
+; Install the "EditorConfig" plugin into your editor to use
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.{json,md}]
+indent_size = 2

.eslintignore

@@ -1,5 +1,4 @@
 /node_modules
 /tests/fixtures
-/tools/*
-!/tools/update-ecma-version-tests.js
 /dist
+tools/create-test-example.js

.eslintrc.cjs

@@ -6,6 +6,11 @@ module.exports = {
     env: {
         es2020: true
     },
+    settings: {
+        jsdoc: {
+            mode: "typescript"
+        }
+    },
     parserOptions: {
         ecmaVersion: 2020,
         sourceType: "module"

.gitignore

@@ -9,4 +9,4 @@ _test.js
 .nyc_output
 .eslint-release-info.json
 yarn.lock
-package-lock.json
+package-lock.json

package.json

@@ -40,16 +40,14 @@
     "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^11.2.0",
     "c8": "^7.11.0",
-    "chai": "^4.3.4",
-    "eslint": "^7.22.0",
+    "chai": "^4.3.6",
+    "eslint": "^8.13.0",
     "eslint-config-eslint": "^7.0.0",
-    "eslint-plugin-jsdoc": "^32.2.0",
+    "eslint-plugin-jsdoc": "^39.2.4",
     "eslint-plugin-node": "^11.1.0",
     "eslint-release": "^3.2.0",
-    "esprima": "latest",
     "esprima-fb": "^8001.2001.0-dev-harmony-fb",
-    "json-diff": "^0.5.4",
-    "mocha": "^8.3.1",
+    "mocha": "^9.2.2",
     "npm-run-all": "^4.1.5",
     "rollup": "^2.41.2",
     "shelljs": "^0.3.0"
@@ -67,7 +65,7 @@
     "unit:esm": "c8 mocha --color --reporter progress --timeout 30000 'tests/lib/**/*.js'",
     "unit:cjs": "mocha --color --reporter progress --timeout 30000 tests/lib/commonjs.cjs",
     "test": "npm-run-all -p unit lint",
-    "lint": "eslint \"*.?(c)js\" lib/ tests/lib/",
+    "lint": "eslint .",
     "fixlint": "npm run lint -- --fix",
     "build": "rollup -c rollup.config.js",
     "update-version": "node tools/update-version.js",

tools/create-test.js

@@ -1,3 +1,4 @@
+/* eslint-disable node/no-process-exit */
 /**
  * @fileoverview A simple script to help generate test cases
  * @author Nicholas C. Zakas
@@ -15,20 +16,46 @@
 //------------------------------------------------------------------------------
 
 import shelljs from "shelljs";
-import { parse } from "../espree.js"
+import { parse } from "../espree.js";
 import path from "path";
 import { fileURLToPath } from "url";
 
 //------------------------------------------------------------------------------
 // Initialization
 //------------------------------------------------------------------------------
 
+// eslint-disable-next-line no-underscore-dangle -- Conventional
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
-var PATTERN = /\/\*!espree\-section:\s*[a-z\d\-]+\*\//gi;
+const PATTERN = /\/\*!espree-section:\s*[a-z\d-]+\*\//giu;
 
-var filename = process.argv[2],
+const filename = process.argv[2],
     codeFilename = process.argv[3];
 
+/**
+ * @typedef {{start: number, end: number}} StartEnd
+ */
+
+/**
+ * acorn adds these "start" and "end" properties
+ * which we don't officially support, we remove
+ * them before creating our test fixtures
+ * @param {StartEnd[]} o The array or object to modify
+ * @returns {void}
+ */
+function recursivelyRemoveStartAndEnd(o) {
+    if (Array.isArray(o)) {
+        o.forEach(recursivelyRemoveStartAndEnd);
+        return;
+    }
+    if (o && typeof o === "object") {
+        delete o.start;
+        delete o.end;
+        Object.keys(o).filter(key => key !== "loc").forEach(key => {
+            recursivelyRemoveStartAndEnd(o[key]);
+        });
+    }
+}
+
 if (!codeFilename) {
     console.error("Missing code to generate tests for");
     console.error("Usage: node create-test.js ecma-features/binaryLiterals/ file_with_code.js");
@@ -41,7 +68,7 @@ if (!filename) {
     process.exit(1);
 }
 
-var rawCode = shelljs.cat(codeFilename),
+const rawCode = shelljs.cat(codeFilename),
     code = rawCode.split(PATTERN),
     sections = rawCode.match(PATTERN);
 
@@ -53,13 +80,13 @@ if (!sections || sections.length !== code.length) {
     process.exit(1);
 }
 
-code.forEach(function(source, index) {
+code.forEach((source, index) => {
 
-    var fullFilename = filename + "/" + (sections[index].substring(18, sections[index].length - 2).trim()),
-        testSourceFilename = path.resolve(__dirname, "../tests/fixtures/" + fullFilename + ".src.js"),
-        testResultFilename = path.resolve(__dirname, "../tests/fixtures/" + fullFilename + ".result.js");
+    const fullFilename = `${filename}/${sections[index].slice(18, sections[index].length - 2).trim()}`,
+        testSourceFilename = path.resolve(__dirname, `../tests/fixtures/${fullFilename}.src.js`),
+        testResultFilename = path.resolve(__dirname, `../tests/fixtures/${fullFilename}.result.js`);
 
-    var result,
+    let result,
         sourceCode = source.trim();
 
     // add an extra semicolon if there's not already one at the end - helps normalize empty lines at end of input
@@ -77,7 +104,7 @@ code.forEach(function(source, index) {
             ecmaFeatures: {
                 experimentalObjectRestSpread: true
             },
-            sourceType: 'script', // change as needed
+            sourceType: "script", // change as needed
             loc: true,
             range: true,
             tokens: true
@@ -91,32 +118,13 @@ code.forEach(function(source, index) {
         };
     }
 
-    recursivelyRemoveStartAndEnd(result)
+    recursivelyRemoveStartAndEnd(result);
 
     sourceCode.to(testSourceFilename);
 
-    let resultCode = `export default ${JSON.stringify(result, (key, value) => {
-        return (typeof value === "bigint") ? `bigint<${value}n>` : value;
-    }, 4)};`;
-    resultCode = resultCode.replace(/"bigint<(\d+n)>"/g, "$1");
+    let resultCode = `export default ${JSON.stringify(result, (key, value) =>
+        ((typeof value === "bigint") ? `bigint<${value}n>` : value), 4)};`;
+
+    resultCode = resultCode.replace(/"bigint<(\d+n)>"/gu, "$1");
     resultCode.to(testResultFilename);
 });
-
-// acorn adds these "start" and "end" properties
-// which we don't officially support, we we remove
-// them before creating our test fixtures
-function recursivelyRemoveStartAndEnd(o) {
-    if (Array.isArray(o)) {
-        o.forEach(recursivelyRemoveStartAndEnd)
-        return
-    }
-    if (o && typeof o === 'object') {
-        delete o.start
-        delete o.end
-        Object.keys(o).filter(function(key) {
-            return key !== 'loc'
-        }).forEach(function(key) {
-            recursivelyRemoveStartAndEnd(o[key])
-        })
-    }
-}

tools/update-tests.js

@@ -21,24 +21,38 @@ import { fileURLToPath } from "url";
 // Helpers
 //------------------------------------------------------------------------------
 
+// eslint-disable-next-line no-underscore-dangle -- Conventional
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
+/**
+ * Gets test file names
+ * @param {string} directory The directory
+ * @returns {string[]} The file names
+ */
 function getTestFilenames(directory) {
-    return shelljs.find(directory).filter(function(filename) {
-        return filename.indexOf(".src.js") > -1;
-    }).map(function(filename) {
-        return filename.substring(directory.length - 1, filename.length - 7);  // strip off ".src.js"
-    });
+    return shelljs.find(directory).filter(filename =>
+        filename.indexOf(".src.js") > -1).map(filename =>
+        filename.slice(directory.length - 1, filename.length - 7)); // strip off ".src.js"
 }
 
+/**
+ * Gets library file names
+ * @param {string} directory The directory
+ * @returns {string[]} The file names
+ */
 function getLibraryFilenames(directory) {
-    return shelljs.find(directory).filter(function(filename) {
-        return filename.indexOf(".js") > -1 && filename.indexOf(".result.js") === -1;
-    }).map(function(filename) {
-        return filename.substring(directory.length - 1);  // strip off directory
-    });
+    return shelljs.find(directory).filter(filename =>
+        filename.indexOf(".js") > -1 &&
+            filename.indexOf(".result.js") === -1).map(filename =>
+        filename.slice(directory.length - 1)); // strip off directory
 }
 
+/**
+ * Outputs the result.
+ * @param {any} result The result
+ * @param {string} testResultFilename Test result file name
+ * @returns {void}
+ */
 function outputResult(result, testResultFilename) {
     `export default ${tester.getAstCode(result)};`.to(testResultFilename);
 }
@@ -47,29 +61,30 @@ function outputResult(result, testResultFilename) {
 // Setup
 //------------------------------------------------------------------------------
 
-var FIXTURES_DIR = "./tests/fixtures/ecma-features",
+const FIXTURES_DIR = "./tests/fixtures/ecma-features",
     LIBRARIES_DIR = "./tests/fixtures/libraries";
 
-var testFiles = getTestFilenames(FIXTURES_DIR),
+const testFiles = getTestFilenames(FIXTURES_DIR),
     libraryFiles = getLibraryFilenames(LIBRARIES_DIR);
 
-libraryFiles.forEach(function(filename) {
-    var testResultFilename = path.resolve(__dirname, "..", LIBRARIES_DIR, filename) + ".result.json",
-        code = shelljs.cat(path.resolve(LIBRARIES_DIR, filename)),
-        result = getExpectedResult(code, {
-            loc: true,
-            range: true,
-            tokens: true
-        });
+libraryFiles.forEach(filename => {
+    const testResultFilename = `${path.resolve(__dirname, "..", LIBRARIES_DIR, filename)}.result.json`,
+        code = shelljs.cat(path.resolve(LIBRARIES_DIR, filename));
+    let result = tester.getExpectedResult(code, {
+        loc: true,
+        range: true,
+        tokens: true
+    });
+
     JSON.stringify(result).to(testResultFilename);
     result = null;
 });
 
 // update all tests in ecma-features
-testFiles.forEach(function(filename) {
+testFiles.forEach(filename => {
 
-    var feature = path.dirname(filename),
-        code = shelljs.cat(path.resolve(FIXTURES_DIR, filename) + ".src.js"),
+    const feature = path.dirname(filename),
+        code = shelljs.cat(`${path.resolve(FIXTURES_DIR, filename)}.src.js`),
         config = {
             loc: true,
             range: true,
@@ -79,8 +94,8 @@ testFiles.forEach(function(filename) {
         };
 
     config.ecmaFeatures[feature] = true;
-    var testResultFilename = path.resolve(__dirname, "..", FIXTURES_DIR, filename) + ".result.js";
-    var result = getExpectedResult(code, config);
+    const testResultFilename = `${path.resolve(__dirname, "..", FIXTURES_DIR, filename)}.result.js`;
+    const result = tester.getExpectedResult(code, config);
 
     outputResult(result, testResultFilename);
 });

tools/update-version.js

@@ -14,4 +14,5 @@ import fs from "fs";
  */
 
 const pkg = JSON.parse(fs.readFileSync("./package.json", "utf8"));
+
 fs.writeFileSync("lib/version.js", `const version = "${pkg.version}";\n\nexport default version;\n`);