run_test: save result in a json file if SELENIUM_TEST_RESULT_FILE is set

selenium-tests/run_test

 #!/usr/bin/python
 import unittest, time, re
 import sys
+import json
+import os
+
+def save_result(testres):
+    if not os.environ.get('SELENIUM_TEST_RESULT_FILE'):
+        return
+    res = {}
+    res['success'] = testres.wasSuccessful()
+    res['total_tests'] = testres.testsRun
+    res['failed'] = []
+    failures = testres.failures + testres.errors
+    for f in failures:
+        r = {}
+        r['id'] = f[0].id()
+        r['error'] = f[1]
+        res['failed'].append(r)
+    output = open(os.environ.get('SELENIUM_TEST_RESULT_FILE'), 'w')
+    output.write(json.dumps(res))
+    output.close()
+
 
 if len(sys.argv) != 2:
     sys.exit('Usage: run_test <test_name>')
@@ -8,3 +28,4 @@ if len(sys.argv) != 2:
 t = __import__('test_%s' % sys.argv[1])
 suite = unittest.TestLoader().loadTestsFromTestCase(t.Test)
 res = unittest.TextTestRunner(verbosity=2).run(suite)
+save_result(res)