Added an image to the example page
diff --git a/example/files/dart.png b/example/files/dart.png
new file mode 100644
index 0000000..fd6de2a
--- /dev/null
+++ b/example/files/dart.png
Binary files differ
diff --git a/example/files/index.html b/example/files/index.html
index 941f5fe..7bf28d1 100644
--- a/example/files/index.html
+++ b/example/files/index.html
@@ -7,5 +7,6 @@
   </head>
   <body>
     <h1>Hello, shelf_static!</h1>
+    <img src='dart.png' alt='Dart logo' width='150' height='151'>
   </body>
 </html>
diff --git a/test/sample_test.dart b/test/sample_test.dart
index fb229b1..c939471 100644
--- a/test/sample_test.dart
+++ b/test/sample_test.dart
@@ -33,6 +33,18 @@
       });
     });
   });
+
+  group('/dart.png', () {
+    test('body is correct', () {
+      return _testFileContents('dart.png');
+    });
+
+    test('mimeType is image/png', () {
+      return _requestFile('dart.png').then((response) {
+        expect(response.mimeType, 'image/png');
+      });
+    });
+  });
 }
 
 Future<Response> _requestFile(String filename) {