Add marks for configuration requirements

These new marks are intended to be used if specific resource is required
and such test would we run only if that resource was configured for that
target.

conftest.py

@@ -25,10 +25,6 @@ def pytest_addoption(parser):
 
 
 def pytest_configure(config):
-    # Add dynamic markers
-    config.addinivalue_line(
-        "markers", "board(boards): mark test to run only on specified board"
-    )
     # Parse target configuration
     targets = configparser.ConfigParser()
     targets.read(os.path.expanduser("~/.nsfarm_targets.ini"))
@@ -46,3 +42,6 @@ def pytest_runtest_setup(item):
     for boards in item.iter_markers(name="board"):
         if board not in boards.args:
             pytest.skip("test is not compatible with target: {}".format(board))
+    for conn in ("serial", "wan", "lan1", "lan2"):
+        if item.get_closest_marker(conn) is not None and conn not in item.config.target_config:
+            pytest.skip("test requires connection: {}".format(conn))

pytest.ini

@@ -2,3 +2,8 @@
 addopts = --strict-markers
 markers =
 	deploy: quick tests to be run as part of deployment process
+	board(boards): mark test to run only on specified board
+	serial: requirement of serial port connection to board
+	wan: requirement of wan ethernet connection to board
+	lan1: requirement of lan1 ethernet connection to board
+	lan2: requirement of lan2 ethernet connection to board

tests/conftest.py

@@ -3,8 +3,8 @@ import nsfarm.board
 import nsfarm.cli
 
 
-@pytest.fixture(scope="session")
-def board(request):
+@pytest.fixture(scope="session", name="board", params=[pytest.param(None, marks=pytest.mark.serial)])
+def fixture_board(request):
     """Brings board on. Nothing else.
     This is top most fixture for board. It returns board handle.
     """

tests/test_experiments.py

 import pytest
 
 
-@pytest.mark.board("omnia")
 def test_help(board, board_uboot):
     assert board_uboot.run("help")
     board.serial_miniterm()