add test script for testing the annotationmodel with ModelTest

tests/data/example1_labels.json

@@ -0,0 +1,33 @@
+[
+    {
+        "type": "image", 
+        "annotations": [
+            {
+                "height": 60.0, 
+                "width": 46.0, 
+                "y": 105.0, 
+                "x": 346.0, 
+                "type": "rect"
+            }, 
+            {
+                "height": 58.0, 
+                "width": 56.0, 
+                "y": 119.0, 
+                "x": 636.0, 
+                "type": "rect"
+            }
+        ], 
+        "filename": "image1.jpg"
+    }, 
+    {
+        "type": "image", 
+        "annotations": [
+            {
+                "y": 155.0, 
+                "x": 409.0, 
+                "type": "point"
+            }
+        ], 
+        "filename": "image2.jpg"
+    }
+]

tests/model_test.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+import os, sys
+from PyQt4.QtGui import QApplication
+from sloth.gui import MainWindow
+from sloth.core.labeltool import LabelTool
+from sloth import APP_NAME, ORGANIZATION_NAME, ORGANIZATION_DOMAIN
+from pymodeltest.modeltest import ModelTest
+
+SAMPLE_DATA = os.path.join(os.path.dirname(__file__), 'data', 'example1_labels.json')
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+    app.setOrganizationName(ORGANIZATION_NAME)
+    app.setOrganizationDomain(ORGANIZATION_DOMAIN)
+    app.setApplicationName(APP_NAME)
+
+    labeltool = LabelTool()
+    if len(sys.argv) < 2:
+        sys.argv.append(SAMPLE_DATA)
+    labeltool.execute_from_commandline(sys.argv)
+    labeltool.modeltest = ModelTest(labeltool._model, labeltool)
+
+    wnd = MainWindow(labeltool)
+    labeltool._mainwindow = wnd
+    wnd.show()
+
+    sys.exit(app.exec_())