feat: added attr-no-unnecessary-whitespace rule (#385)

* Added attr-no-unnecessary-whitespace rule

* add tests

* remove console.log statement

* fix: merge conflicts

Co-authored-by: pcfutures <me@jaketaylor.co>

Author: thedaviddias

src/rules/attr-no-unnecessary-whitespace.js

@@ -0,0 +1,23 @@
+export default {
+    id: 'attr-no-unnecessary-whitespace',
+    description: 'No spaces between attribute names and values.',
+    init: function (parser, reporter, options) {
+        var self = this;
+        var exceptions = Array.isArray(options) ? options : [];
+        parser.addListener('tagstart', function (event) {
+            var attrs = event.attrs,
+                col = event.col + event.tagName.length + 1;
+            for (var i = 0; i < attrs.length; i++) {
+                if (exceptions.indexOf(attrs[i].name) === -1 && /[^=](\s+=\s+|=\s+|\s+=)/g.test(attrs[i].raw.trim())) {
+                    reporter.error(
+                        'The attribute \'' + attrs[i].name + '\' must not have spaces between the name and value.',
+                        event.line,
+                        col + attrs[i].index,
+                        self,
+                        attrs[i].raw
+                    );
+                }
+            }
+        });
+    }
+};

src/rules/index.js

@@ -27,3 +27,4 @@ export { default as tagnameLowercase } from './tagname-lowercase';
 export { default as tagnameSpecialChars } from './tagname-specialchars';
 export { default as titleRequire } from './title-require';
 export { default as tagsCheck } from './tags-check';
+export { default as attrNoUnnecessaryWhitespace } from './attr-no-unnecessary-whitespace';

test/rules/attr-no-unnecessary-whitespace.js

@@ -0,0 +1,31 @@
+var expect = require('expect.js');
+
+var HTMLHint = require('../../dist/htmlhint.js').HTMLHint;
+
+var ruldId = 'attr-no-unnecessary-whitespace',
+    ruleOptions = {};
+
+ruleOptions[ruldId] = true;
+
+describe('Rules: ' + ruldId, function () {
+    it('Attribute with spaces should result in an error', function () {
+        var codes = [
+            '<div title = "a" />',
+            '<div title= "a" />',
+            '<div title ="a" />',
+        ];
+        for (var i = 0; i < codes.length; i++) {
+            var messages = HTMLHint.verify(codes[i], ruleOptions);
+            expect(messages.length).to.be(1);
+            expect(messages[0].rule.id).to.be(ruldId);
+            expect(messages[0].line).to.be(1);
+            expect(messages[0].col).to.be(5);
+        }
+    });
+
+    it('Attribute without spaces should not result in an error', function () {
+        var code = '<div title="a" />';
+        var messages = HTMLHint.verify(code, ruleOptions);
+        expect(messages.length).to.be(0);
+    });
+});