With base class

Author: aaltat

src/robotlibcore.py

@@ -299,7 +299,7 @@ def parse_plugins(self, plugins: str) -> typing.List:
             plugin = plugin(*parsed_plugin.args, **parsed_plugin.kw_args)
             if self._base_class and not isinstance(plugin, self._base_class):
                 message = (
-                    "Plugin does not inherit SeleniumLibrary.base.LibraryComponent"
+                    f"Plugin does not inherit {self._base_class}"
                 )
                 raise PluginError(message)
             imported_plugins.append(plugin)

utest/test_plugin_api.py

@@ -1,6 +1,6 @@
 import pytest
 
-from robotlibcore import Module, PluginParser
+from robotlibcore import Module, PluginParser, PluginError
 import my_plugin_test
 
 
@@ -46,5 +46,13 @@ def test_parse_plugins(plugin_parser):
     assert len(plugins) == 2
     assert isinstance(plugins[0], my_plugin_test.TestClass)
     assert isinstance(plugins[1], my_plugin_test.TestClassWithBase)
-    
 
+
+def test_parse_plugins_with_base():
+    parser = PluginParser(my_plugin_test.LibraryBase)
+    plugins = parser.parse_plugins("my_plugin_test.TestClassWithBase")
+    assert len(plugins) == 1
+    assert isinstance(plugins[0], my_plugin_test.TestClassWithBase)
+    with pytest.raises(PluginError) as excinfo:
+        parser.parse_plugins("my_plugin_test.TestClass")
+    assert "Plugin does not inherit <class 'my_plugin_test.LibraryBase'>" in str(excinfo.value)