Improve disallowSpaceAfterBinaryOperators rule

Add check for assignment to disallowSpaceAfterBinaryOperators rule

Author: markelog

lib/rules/disallow-space-after-binary-operators.js

@@ -39,17 +39,18 @@ module.exports.prototype = {
             }
         });
 
-        // Comma
-        if (operators[',']) {
+        // Comma and assignment
+        if (operators[','] || operators['=']) {
             file.iterateTokensByType('Punctuator', function(token, i, tokens) {
-                if (token.value !== ',') {
+                var operator = token.value;
+                if (operator !== ',' && operator !== '=') {
                     return;
                 }
 
                 var nextToken = tokens[i + 1];
                 if (nextToken && nextToken.range[0] !== token.range[1]) {
                     errors.add(
-                        'Operator ' + token.value + ' should stick to following expression',
+                        'Operator ' + operator + ' should stick to following expression',
                         token.loc.start
                     );
                 }

test/rules/disallow-space-after-binary-operators.js

@@ -41,5 +41,13 @@ describe('rules/disallow-space-after-binary-operators', function() {
         checker.configure({ disallowSpaceAfterBinaryOperators: [','] });
         assert(checker.checkString('({a: 1, b: 2})').getErrorCount() === 1);
     });
+    it('should report assignment operator for "a = b"', function() {
+        checker.configure({ disallowSpaceAfterBinaryOperators: ['='] });
+        assert(checker.checkString('a = b').getErrorCount() === 1);
+    });
+    it('should not report assignment operator for "a=b"', function() {
+        checker.configure({ disallowSpaceAfterBinaryOperators: ['='] });
+        assert(checker.checkString('a=b').isEmpty());
+    });
 
 });