Fix: Stops task from crashing when an error occurs

Gruntfile.js

@@ -47,6 +47,12 @@ module.exports = function(grunt) {
           'tmp/out_with_important.html': 'test/fixtures/in.html'
         },
       },
+      does_not_exist: {
+        options: {},
+        files: {
+          'tmp/out_does_not_exist.html': 'test/fixtures/in_does_not_exist.html'
+        },
+      }
     },
 
     // Unit tests.

tasks/inline_css.js

@@ -22,17 +22,26 @@ module.exports = function(grunt) {
     var index = 0;
     var count = this.files.length;
 
+    var increaseCount = function () {
+      index++;
+      if (index === count) {
+        done();
+      }
+    };
+
     // Iterate over all specified file groups.
     this.files.forEach(function(f) {
 
       var filepath = f.src.toString();
       if (typeof filepath !== 'string' || filepath === '') {
         grunt.log.error('src must be a single string');
+        increaseCount();
         return false;
       }
 
       if (!grunt.file.exists(filepath)) {
         grunt.log.error('Source file "' + filepath + '" not found.');
+        increaseCount();
         return false;
       }
 
@@ -41,18 +50,16 @@ module.exports = function(grunt) {
       juice.juiceFile(filepath, options, function(err, html) {
 
         if (err) {
-          return grunt.log.error(err);
+          grunt.log.error(err);
+          increaseCount();
+
+          return;
         }
 
         grunt.file.write(f.dest, html);
         grunt.log.writeln('File "' + f.dest + '" created.');
 
-
-        index++;
-        if (index === count) {
-          done();
-        }
-
+        increaseCount();
       });
 
     });

test/inline_css_test.js

@@ -46,5 +46,22 @@ exports.inline_css = {
     test.equal(actual, expected, 'should inline css');
 
     test.done();
+  },
+
+  does_not_exist: function(test) {
+    test.expect(0);
+
+    try {
+      var actual = grunt.file.read('tmp/out_does_not_exist.html');
+    } catch(err) {
+
+      if (err.origError.code === 'ENOENT') {
+        return test.done();
+      }
+
+      return test.done(new Error('Should have errored with a file not found: ' + err.code));
+    }
+
+    test.done(new Error('Should have errored'));
   }
 };