Add python screenshot tests

Author: AutomatedTester

Diff for: py/test/selenium/webdriver/common/takes_screenshots_tests.py

@@ -0,0 +1,44 @@
+# Licensed to the Software Freedom Conservancy (SFC) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The SFC licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import pytest
+
+import unittest
+import base64
+import imghdr
+
+
+class ScreenshotTests(unittest.TestCase):
+
+    def test_get_screenshot_as_base64(self):
+        self._loadSimplePage()
+        result = base64.decodestring(self.driver.get_screenshot_as_base64())
+        self.assertEqual(imghdr.what('', result), 'png')
+
+    def test_get_screenshot_as_png(self):
+        self._loadSimplePage()
+        result = self.driver.get_screenshot_as_png()
+        self.assertEqual(imghdr.what('', result), 'png')
+
+    def _pageURL(self, name):
+        return self.webserver.where_is(name + '.html')
+
+    def _loadSimplePage(self):
+        self._loadPage("simpleTest")
+
+    def _loadPage(self, name):
+        self.driver.get(self._pageURL(name))