Internal: Checker - return correct arguments for excluded files

Fixes #1816
Closes gh-1817

lib/checker.js

@@ -183,7 +183,11 @@ Checker.prototype._processPath = function(path, fileHandler) {
             }
 
             return fileHandler(path).then(function(errors) {
-                return [errors];
+                if (errors) {
+                    return [errors];
+                }
+
+                return [];
             });
         }, this);
     }, this);

test/specs/checker.js

@@ -1,7 +1,9 @@
+var fs = require('fs');
 var assert = require('assert');
+
 var sinon = require('sinon');
+
 var Checker = require('../../lib/checker');
-var fs = require('fs');
 
 describe('checker', function() {
     var checker;
@@ -34,6 +36,19 @@ describe('checker', function() {
                 assert(errors.length === 3);
             });
         });
+
+        it('should return empty array for excluded dir', function() {
+            checker = new Checker();
+            checker.registerDefaultRules();
+            checker.configure({
+                disallowKeywords: ['with'],
+                excludeFiles: ['./test/**']
+            });
+            return checker.checkDirectory('./test/data/checker').then(function(errors) {
+                assert(Array.isArray(errors));
+                assert.equal(errors.length, 0);
+            });
+        });
     });
 
     describe('checkPath', function() {
@@ -72,6 +87,19 @@ describe('checker', function() {
                 assert(true);
             });
         });
+
+        it('should return empty array for excluded files', function() {
+            checker = new Checker();
+            checker.registerDefaultRules();
+            checker.configure({
+                disallowKeywords: ['with'],
+                excludeFiles: ['./test/**']
+            });
+            return checker.checkPath('./test/data/checker/file.js').then(function(errors) {
+                assert(Array.isArray(errors));
+                assert.equal(errors.length, 0);
+            });
+        });
     });
 
     describe('checkStdin', function() {