added tests for the plugins hooks

tests/plugins/test_hooks.py

@@ -0,0 +1,13 @@
+from kube_hunter.plugins import hookimpl
+
+return_string = "return_string"
+
+
+@hookimpl
+def parser_add_arguments(parser):
+    return return_string
+
+
+@hookimpl
+def load_plugin(args):
+    return return_string

tests/plugins/test_plugins_hooks.py

@@ -0,0 +1,17 @@
+from argparse import ArgumentParser
+from tests.plugins import test_hooks
+from kube_hunter.plugins import initialize_plugin_manager
+
+
+def test_all_plugin_hooks():
+    pm = initialize_plugin_manager()
+    pm.register(test_hooks)
+
+    # Testing parser_add_arguments
+    parser = ArgumentParser("Test Argument Parser")
+    results = pm.hook.parser_add_arguments(parser=parser)
+    assert test_hooks.return_string in results
+
+    # Testing load_plugin
+    results = pm.hook.load_plugin(args=[])
+    assert test_hooks.return_string in results