Removed @pytest.fixture requires_extension.

Files that were affected: conftest.py, test_sketch.py.
The requires_extension fixture was removed since now we are able to install Chrome
extension on Chrome versions > 41 and there is no need to skip tests that require
extension when running tests under Chrome.

Author: Konstantinacc

tests/common/sketch/test_sketch.py

@@ -54,13 +54,11 @@ def test_boards_dropdown(self):
 
         assert boards_dropdown.first_selected_option.text == TEST_BOARD
 
-    @pytest.mark.requires_extension
     def test_ports_dropdown(self):
         """Tests that the ports dropdown exists."""
         ports = self.get_element(By.ID, "cb_cf_ports")
         assert ports.text == 'No ports detected'
 
-    @pytest.mark.requires_extension
     def test_run_with_no_port(self):
         """Makes sure that there is an error when we attempt to run with no
         port selected."""
@@ -72,13 +70,11 @@ def test_run_with_no_port(self):
             )
         )
 
-    @pytest.mark.requires_extension
     def test_speeds_dropdown(self):
         """Tests that the speeds dropdown exists."""
         self.get_element(By.ID, "serial_monitor_toggle").click()
         self.get_element(By.ID, "cb_cf_baud_rates")
 
-    @pytest.mark.requires_extension
     def test_serial_monitor_disables_fields(self):
         """Tests that opening the serial monitor disables the port and baudrate
         fields."""

tests/conftest.py

@@ -149,26 +149,3 @@ def test_some_feature():
         required_url = request.node.get_marker('requires_url').args[0]
         if required_url.rstrip('/') != testing_url.rstrip('/'):
             pytest.skip('skipped test that requires --url=%s' % required_url)
-
-
-@pytest.fixture(autouse=True)
-def requires_extension(request, webdriver):
-    """Mark that a test requires the codebender extension.
-    Ideally, this marker would not be necessary. However, it is used so that we
-    skip tests when running under chrome that require the extension (for now).
-    This is due to the fact that the chrome driver leaves open the
-    "confirm extension" dialogue without actually installing it.
-
-     This functionality should be invoked as a pytest marker, e.g.:
-
-    ```
-    @pytest.mark.requires_extension
-    def test_some_feature():
-        ...
-    ```
-    """
-    if request.node.get_marker('requires_extension'):
-        if webdriver.desired_capabilities["browserName"] == "chrome":
-            pytest.skip("skipped test that requires codebender extension. "
-                        "The current webdriver is Chrome, and the ChromeDriver "
-                        "does not properly install extensions.")