Add screenshot

Author: mpociot

README.md

@@ -154,7 +154,7 @@ $this->get('/')
 
 If you use [iTerm2](https://www.iterm2.com/) as your terminal of choice, you will see an image representation of the diff when you run your tests.
 
---SCREENSHOT--
+![iTerm 2](https://beyondco.de/github/visualdiff.png)
 
 ### Changelog
 

src/VisualDiffServiceProvider.php

@@ -46,6 +46,8 @@ public function register()
             $tester->setDiffOutputPath(config('visualdiff.diff_path'));
 
             $tester->createDiffs();
+
+            return $this;
         });
 
         TestResponse::macro('visualDiffForResolutions', function (array $resolutions, $name = null) {
@@ -54,7 +56,7 @@ public function register()
                 $name = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 5)[4]['function'];
             }
 
-            $this->visualDiff($name, $resolutions);
+            return $this->visualDiff($name, $resolutions);
         });
 
         if (class_exists(Browser::class)) {
@@ -78,6 +80,8 @@ public function register()
                 $tester->setDiffOutputPath(config('visualdiff.diff_path'));
 
                 $tester->createDiffs();
+
+                return $this;
             });
 
             Browser::macro('visualDiffForResolutions', function (array $resolutions, $name = null) {
@@ -86,7 +90,7 @@ public function register()
                     $name = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 7)[6]['function'];
                 }
 
-                $this->visualDiff($name, $resolutions);
+                return $this->visualDiff($name, $resolutions);
             });
         }
     }

src/VisualDiffTester.php

@@ -149,7 +149,7 @@ protected function createDiff()
                 config('visualdiff.maximum_error_percentage'),
                 $result->error_percentage,
                 "The visual diff for " . $this->name . " has a higher pixel diff than the allowed maximum." . PHP_EOL .
-                "See: " . $this->getDiffFilename()
+                "See: " . $this->diffOutputPath . $this->getDiffFilename()
             );
         } catch (ExpectationFailedException $e) {
             echo exec(__DIR__ . '/../bin/imgcat ' . escapeshellarg($this->diffOutputPath . DIRECTORY_SEPARATOR . $this->getDiffFilename()));