[Tests] add linting

.eslintignore

@@ -0,0 +1,4 @@
+# eslintignore
+
+# TODO: fix
+index.js

.eslintrc

@@ -0,0 +1,44 @@
+{
+    "root": true,
+    "extends": "@ljharb",
+    "rules": {
+        "indent": [2, 4],
+        "strict": 1,
+        "no-octal-escape": 1,
+    },
+    "globals": {
+        "BigInt": false,
+    },
+    "overrides": [
+        {
+            "files": ["test/**", "test-*", "example/**"],
+            "rules": {
+              "array-bracket-newline": 0,
+              "max-params": 0,
+              "max-statements": 0,
+              "max-statements-per-line": 0,
+              "no-magic-numbers": 0,
+              "object-curly-newline": 0,
+              "sort-keys": 0,
+            },
+        },
+        {
+            "files": ["example/**"],
+            "rules": {
+                "no-console": 0,
+            },
+        },
+        {
+            "files": ["test/browser/**"],
+            "env": {
+                "browser": true,
+            },
+        },
+        {
+            "files": ["test/bigint*"],
+            "rules": {
+                "new-cap": [2, { "capIsNewExceptions": ["BigInt"] }],
+            },
+        },
+    ],
+}

.travis.yml

@@ -35,6 +35,8 @@ matrix:
   include:
     - node_js: "10.0"
       env: BIGINT=true
+    - node_js: "lts/*"
+      env: PRETEST=true
     - node_js: "node"
       env: COVERAGE=true
     - node_js: "9.10"

example/all.js

@@ -1,19 +1,23 @@
+'use strict';
+
 var inspect = require('../');
 var Buffer = require('safer-buffer').Buffer;
 
-var holes = [ 'a', 'b' ];
-holes[4] = 'e', holes[6] = 'g';
+var holes = ['a', 'b'];
+holes[4] = 'e';
+holes[6] = 'g';
+
 var obj = {
     a: 1,
-    b: [ 3, 4, undefined, null ],
+    b: [3, 4, undefined, null],
     c: undefined,
     d: null,
     e: {
         regex: /^x/i,
         buf: Buffer.from('abc'),
         holes: holes
     },
-    now: new Date
+    now: new Date()
 };
 obj.self = obj;
 console.log(inspect(obj));

example/circular.js

@@ -1,4 +1,6 @@
+'use strict';
+
 var inspect = require('../');
-var obj = { a: 1, b: [3,4] };
+var obj = { a: 1, b: [3, 4] };
 obj.c = obj;
 console.log(inspect(obj));

example/fn.js

@@ -1,3 +1,5 @@
+'use strict';
+
 var inspect = require('../');
-var obj = [ 1, 2, function f (n) { return n + 5 }, 4 ];
+var obj = [1, 2, function f(n) { return n + 5; }, 4];
 console.log(inspect(obj));

example/inspect.js

@@ -1,7 +1,10 @@
+'use strict';
+
+/* eslint-env browser */
 var inspect = require('../');
 
 var d = document.createElement('div');
 d.setAttribute('id', 'beep');
 d.innerHTML = '<b>wooo</b><i>iiiii</i>';
 
-console.log(inspect([ d, { a: 3, b : 4, c: [5,6,[7,[8,[9]]]] } ]));
+console.log(inspect([d, { a: 3, b: 4, c: [5, 6, [7, [8, [9]]]] }]));

package.json

@@ -4,11 +4,15 @@
   "description": "string representations of objects in node and the browser",
   "main": "index.js",
   "devDependencies": {
+    "@ljharb/eslint-config": "^13.1.1",
     "core-js": "^2.5.5",
+    "eslint": "^5.16.0",
     "nyc": "^10.3.2",
     "tape": "^4.9.0"
   },
   "scripts": {
+    "pretest": "npm run lint",
+    "lint": "eslint .",
     "test": "npm run tests-only",
     "posttest": "npm run test:bigint",
     "pretests-only": "node test-core-js",

test/bigint.js

@@ -2,29 +2,30 @@ var inspect = require('../');
 var test = require('tape');
 
 test('bigint', { skip: typeof BigInt === 'undefined' }, function (t) {
-  t.test('primitives', function (st) {
-    st.plan(3);
+    t.test('primitives', function (st) {
+        st.plan(3);
 
-    st.equal(inspect(BigInt(-256)), '-256n');
-    st.equal(inspect(BigInt(0)), '0n');
-    st.equal(inspect(BigInt(256)), '256n');
-  });
+        st.equal(inspect(BigInt(-256)), '-256n');
+        st.equal(inspect(BigInt(0)), '0n');
+        st.equal(inspect(BigInt(256)), '256n');
+    });
 
-  t.test('objects', function (st) {
-    st.plan(3);
+    t.test('objects', function (st) {
+        st.plan(3);
 
-    st.equal(inspect(Object(BigInt(-256))), 'Object(-256n)');
-    st.equal(inspect(Object(BigInt(0))), 'Object(0n)');
-    st.equal(inspect(Object(BigInt(256))), 'Object(256n)');
-  });
+        st.equal(inspect(Object(BigInt(-256))), 'Object(-256n)');
+        st.equal(inspect(Object(BigInt(0))), 'Object(0n)');
+        st.equal(inspect(Object(BigInt(256))), 'Object(256n)');
+    });
 
-  t.test('syntactic primitives', function (st) {
-    st.plan(3);
+    t.test('syntactic primitives', function (st) {
+        st.plan(3);
 
-    st.equal(inspect(Function('return -256n')()), '-256n');
-    st.equal(inspect(Function('return 0n')()), '0n');
-    st.equal(inspect(Function('return 256n')()), '256n');
-  });
+        /* eslint-disable no-new-func */
+        st.equal(inspect(Function('return -256n')()), '-256n');
+        st.equal(inspect(Function('return 0n')()), '0n');
+        st.equal(inspect(Function('return 256n')()), '256n');
+    });
 
-  t.end();
+    t.end();
 });

test/browser/dom.js

@@ -3,13 +3,13 @@ var test = require('tape');
 
 test('dom element', function (t) {
     t.plan(1);
-    
+
     var d = document.createElement('div');
     d.setAttribute('id', 'beep');
     d.innerHTML = '<b>wooo</b><i>iiiii</i>';
-    
+
     t.equal(
-        inspect([ d, { a: 3, b : 4, c: [5,6,[7,[8,[9]]]] } ]),
+        inspect([d, { a: 3, b: 4, c: [5, 6, [7, [8, [9]]]] }]),
         '[ <div id="beep">...</div>, { a: 3, b: 4, c: [ 5, 6, [ 7, [ 8, [Object] ] ] ] } ]'
     );
 });

test/circular.js

@@ -3,7 +3,7 @@ var test = require('tape');
 
 test('circular', function (t) {
     t.plan(1);
-    var obj = { a: 1, b: [3,4] };
+    var obj = { a: 1, b: [3, 4] };
     obj.c = obj;
     t.equal(inspect(obj), '{ a: 1, b: [ 3, 4 ], c: [Circular] }');
 });

test/deep.js

@@ -3,7 +3,7 @@ var test = require('tape');
 
 test('deep', function (t) {
     t.plan(2);
-    var obj = [ [ [ [ [ [ 500 ] ] ] ] ] ];
+    var obj = [[[[[[500]]]]]];
     t.equal(inspect(obj), '[ [ [ [ [ [Object] ] ] ] ] ]');
     t.equal(inspect(obj, { depth: 2 }), '[ [ [Object] ] ]');
 });

test/element.js

@@ -5,35 +5,35 @@ test('element', function (t) {
     t.plan(3);
     var elem = {
         nodeName: 'div',
-        attributes: [ { name: 'class', value: 'row' } ],
-        getAttribute: function (key) {},
+        attributes: [{ name: 'class', value: 'row' }],
+        getAttribute: function (key) { return key; },
         childNodes: []
     };
-    var obj = [ 1, elem, 3 ];
+    var obj = [1, elem, 3];
     t.deepEqual(inspect(obj), '[ 1, <div class="row"></div>, 3 ]');
     t.deepEqual(inspect(obj, { quoteStyle: 'single' }), "[ 1, <div class='row'></div>, 3 ]");
     t.deepEqual(inspect(obj, { quoteStyle: 'double' }), '[ 1, <div class="row"></div>, 3 ]');
 });
-    
+
 test('element no attr', function (t) {
     t.plan(1);
     var elem = {
         nodeName: 'div',
-        getAttribute: function (key) {},
+        getAttribute: function (key) { return key; },
         childNodes: []
     };
-    var obj = [ 1, elem, 3 ];
+    var obj = [1, elem, 3];
     t.deepEqual(inspect(obj), '[ 1, <div></div>, 3 ]');
 });
 
 test('element with contents', function (t) {
     t.plan(1);
     var elem = {
         nodeName: 'div',
-        getAttribute: function (key) {},
-        childNodes: [ { nodeName: 'b' } ]
+        getAttribute: function (key) { return key; },
+        childNodes: [{ nodeName: 'b' }]
     };
-    var obj = [ 1, elem, 3 ];
+    var obj = [1, elem, 3];
     t.deepEqual(inspect(obj), '[ 1, <div>...</div>, 3 ]');
 });
 
@@ -45,9 +45,9 @@ test('element instance', function (t) {
         this.attributes = attr;
     };
     global.HTMLElement.prototype.getAttribute = function () {};
-    
-    var elem = new(global.HTMLElement)('div', []);
-    var obj = [ 1, elem, 3 ];
+
+    var elem = new global.HTMLElement('div', []);
+    var obj = [1, elem, 3];
     t.deepEqual(inspect(obj), '[ 1, <div></div>, 3 ]');
     global.HTMLElement = h;
 });

test/err.js

@@ -3,21 +3,23 @@ var test = require('tape');
 
 test('type error', function (t) {
     t.plan(1);
-    var aerr = new TypeError;
+    var aerr = new TypeError();
     aerr.foo = 555;
-    aerr.bar = [1,2,3];
-    
+    aerr.bar = [1, 2, 3];
+
     var berr = new TypeError('tuv');
     berr.baz = 555;
-    
-    var cerr = new SyntaxError;
+
+    var cerr = new SyntaxError();
     cerr.message = 'whoa';
     cerr['a-b'] = 5;
-    
+
     var obj = [
-        new TypeError,
+        new TypeError(),
         new TypeError('xxx'),
-        aerr, berr, cerr
+        aerr,
+        berr,
+        cerr
     ];
     t.equal(inspect(obj), '[ ' + [
         '[TypeError]',

test/fn.js

@@ -3,25 +3,25 @@ var test = require('tape');
 
 test('function', function (t) {
     t.plan(1);
-    var obj = [ 1, 2, function f (n) {}, 4 ];
+    var obj = [1, 2, function f(n) { return n; }, 4];
     t.equal(inspect(obj), '[ 1, 2, [Function: f], 4 ]');
 });
 
 test('function name', function (t) {
     t.plan(1);
     var f = (function () {
-      return function () {};
+        return function () {};
     }());
-    f.toString = function () { return 'function xxx () {}' };
-    var obj = [ 1, 2, f, 4 ];
+    f.toString = function () { return 'function xxx () {}'; };
+    var obj = [1, 2, f, 4];
     t.equal(inspect(obj), '[ 1, 2, [Function: xxx], 4 ]');
 });
 
 test('anon function', function (t) {
     var f = (function () {
-      return function () {};
+        return function () {};
     }());
-    var obj = [ 1, 2, f, 4 ];
+    var obj = [1, 2, f, 4];
     t.equal(inspect(obj), '[ 1, 2, [Function], 4 ]');
 
     t.end();

test/has.js

@@ -22,10 +22,13 @@ var withoutProperty = function (object, property, fn) {
 
 test('when Object#hasOwnProperty is deleted', function (t) {
     t.plan(1);
-    var arr = [1, , 3];
+    var arr = [1, , 3]; // eslint-disable-line no-sparse-arrays
+
+    // eslint-disable-next-line no-extend-native
     Array.prototype[1] = 2; // this is needed to account for "in" vs "hasOwnProperty"
+
     withoutProperty(Object.prototype, 'hasOwnProperty', function () {
         t.equal(inspect(arr), '[ 1, , 3 ]');
     });
-	delete Array.prototype[1];
+    delete Array.prototype[1];
 });

test/holes.js

@@ -1,7 +1,7 @@
 var test = require('tape');
 var inspect = require('../');
 
-var xs = [ 'a', 'b' ];
+var xs = ['a', 'b'];
 xs[5] = 'f';
 xs[7] = 'j';
 xs[8] = 'k';

test/inspect.js

@@ -3,6 +3,6 @@ var test = require('tape');
 
 test('inspect', function (t) {
     t.plan(1);
-    var obj = [ { inspect: function () { return '!XYZ¡' } }, [] ];
+    var obj = [{ inspect: function () { return '!XYZ¡'; } }, []];
     t.equal(inspect(obj), '[ !XYZ¡, [] ]');
 });

test/undef.js

@@ -1,7 +1,7 @@
 var test = require('tape');
 var inspect = require('../');
 
-var obj = { a: 1, b: [ 3, 4, undefined, null ], c: undefined, d: null };
+var obj = { a: 1, b: [3, 4, undefined, null], c: undefined, d: null };
 
 test('undef and null', function (t) {
     t.plan(1);