Tests: TestUnit class removed.

Prerequisite checks moved to the fixture in conftest.py.

test/conftest.py

@@ -184,6 +184,40 @@ def pytest_runtest_makereport(item, call):
     setattr(item, "rep_" + rep.when, rep)
 
 
+@pytest.fixture(scope='class', autouse=True)
+def check_prerequisites(request):
+    cls = request.cls
+    missed = []
+
+    # check modules
+
+    if 'modules' in cls.prerequisites:
+        available_modules = list(option.available['modules'].keys())
+
+        for module in cls.prerequisites['modules']:
+            if module in available_modules:
+                continue
+
+            missed.append(module)
+
+    if missed:
+        pytest.skip('Unit has no ' + ', '.join(missed) + ' module(s)')
+
+    # check features
+
+    if 'features' in cls.prerequisites:
+        available_features = list(option.available['features'].keys())
+
+        for feature in cls.prerequisites['features']:
+            if feature in available_features:
+                continue
+
+            missed.append(feature)
+
+    if missed:
+        pytest.skip(', '.join(missed) + ' feature(s) not supported')
+
+
 @pytest.fixture(autouse=True)
 def run(request):
     unit = unit_run()