1 files changed, 82 insertions, 0 deletions
diff --git a/testing/marionette/harness/marionette_harness/tests/unit/test_context.py b/testing/marionette/harness/marionette_harness/tests/unit/test_context.py
new file mode 100644
index 0000000000..4f2c077677
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/tests/unit/test_context.py
@@ -0,0 +1,82 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from marionette_driver.decorators import using_context
+from marionette_driver.errors import MarionetteException
+from marionette_harness import MarionetteTestCase
+
+
+class ContextTestCase(MarionetteTestCase):
+    def setUp(self):
+        super(ContextTestCase, self).setUp()
+
+        # shortcuts to improve readability of these tests
+        self.chrome = self.marionette.CONTEXT_CHROME
+        self.content = self.marionette.CONTEXT_CONTENT
+
+        self.assertEqual(self.get_context(), self.content)
+
+        test_url = self.marionette.absolute_url("empty.html")
+        self.marionette.navigate(test_url)
+
+    def get_context(self):
+        return self.marionette._send_message("Marionette:GetContext", key="value")
+
+
+class TestSetContext(ContextTestCase):
+    def test_switch_context(self):
+        self.marionette.set_context(self.chrome)
+        self.assertEqual(self.get_context(), self.chrome)
+
+        self.marionette.set_context(self.content)
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_invalid_context(self):
+        with self.assertRaises(ValueError):
+            self.marionette.set_context("foobar")
+
+
+class TestUsingContext(ContextTestCase):
+    def test_set_different_context_using_with_block(self):
+        with self.marionette.using_context(self.chrome):
+            self.assertEqual(self.get_context(), self.chrome)
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_set_same_context_using_with_block(self):
+        with self.marionette.using_context(self.content):
+            self.assertEqual(self.get_context(), self.content)
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_nested_with_blocks(self):
+        with self.marionette.using_context(self.chrome):
+            self.assertEqual(self.get_context(), self.chrome)
+            with self.marionette.using_context(self.content):
+                self.assertEqual(self.get_context(), self.content)
+            self.assertEqual(self.get_context(), self.chrome)
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_set_scope_while_in_with_block(self):
+        with self.marionette.using_context(self.chrome):
+            self.assertEqual(self.get_context(), self.chrome)
+            self.marionette.set_context(self.content)
+            self.assertEqual(self.get_context(), self.content)
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_exception_raised_while_in_with_block_is_propagated(self):
+        with self.assertRaises(MarionetteException):
+            with self.marionette.using_context(self.chrome):
+                raise MarionetteException
+        self.assertEqual(self.get_context(), self.content)
+
+    def test_with_using_context_decorator(self):
+        @using_context("content")
+        def inner_content(m):
+            self.assertEqual(self.get_context(), "content")
+
+        @using_context("chrome")
+        def inner_chrome(m):
+            self.assertEqual(self.get_context(), "chrome")
+
+        inner_content(self.marionette)
+        inner_chrome(self.marionette)