Do not throw error on suites that do not have need for oxygen

src/oxygen/oxygen.py

@@ -8,6 +8,7 @@
 
 from robot.api import ExecutionResult, ResultVisitor, ResultWriter
 from robot.libraries.BuiltIn import BuiltIn
+from robot.errors import DataError
 from yaml import load, FullLoader
 
 from .config import CONFIG_FILE
@@ -85,9 +86,13 @@ def __init__(self):
         self.run_time_data = {}
 
     def end_test(self, name, attributes):
-        lib = BuiltIn().get_library_instance('oxygen.OxygenLibrary')
-        if lib:
-            self.run_time_data[attributes['longname']] = lib.data
+        try:
+            lib = BuiltIn()._get_context().namespace.get_library_instance(
+                'oxygen.OxygenLibrary')
+            if lib:
+                self.run_time_data[attributes['longname']] = lib.data
+        except DataError as _:
+            pass
 
     def output_file(self, path):
         result = ExecutionResult(path)

tests/atest/test_with_import.robot

@@ -0,0 +1,16 @@
+*** Settings ***
+Library    oxygen.OxygenLibrary
+Library    OperatingSystem
+
+*** Variables ***
+${JUNIT XML FILE}=    ${CURDIR}${/}..${/}resources${/}junit-single-testsuite.xml
+
+*** Test Cases ***
+Oxygen's unit test with dynamic import
+    Import Library    oxygen.OxygenLibrary
+    Run JUnit     ${JUNIT XML FILE}
+    ...           echo Run JUnit Dynamically Imported
+
+Oxygen's unit test with global import
+    Run JUnit     ${JUNIT XML FILE}
+    ...           echo Run JUnit Globally Imported

tests/atest/test_without_import.robot

@@ -0,0 +1,3 @@
+*** Test Cases ***
+Oxygen's unit test without import
+    Log    Some text

tests/utest/oxygen/test_oxygen_listener.py

@@ -11,18 +11,21 @@ def test_listener_api_version_is_not_changed_accidentally(self):
         self.assertEqual(self.listener.ROBOT_LISTENER_API_VERSION, 2)
 
     def mock_lib_instance(self, mock_builtin, return_value):
-        m = Mock()
-        m.get_library_instance.return_value = return_value
-        mock_builtin.return_value = m
-        return m
+        m_builtin = Mock()
+        m_get_context = Mock()
+        m_builtin._get_context.return_value = m_get_context
+        m_get_context.namespace.get_library_instance.return_value = \
+            return_value
+        mock_builtin.return_value = m_builtin
+        return m_builtin
 
     @patch('oxygen.oxygen.BuiltIn')
     def test_end_test_when_library_was_not_used(self, mock_builtin):
         m = self.mock_lib_instance(mock_builtin, None)
 
         self.listener.end_test('foo', {})
 
-        m.get_library_instance.assert_called_once_with('oxygen.OxygenLibrary')
+        m._get_context().namespace.get_library_instance.assert_called_once_with('oxygen.OxygenLibrary')
         self.assertEqual(self.listener.run_time_data, {})
 
     @patch('oxygen.oxygen.BuiltIn')
@@ -33,7 +36,7 @@ def test_end_test_when_library_was_used(self, mock_builtin):
 
         self.listener.end_test('oxygen.OxygenLibrary', {'longname': 'hello'})
 
-        m.get_library_instance.assert_called_once_with('oxygen.OxygenLibrary')
+        m._get_context().namespace.get_library_instance.assert_called_once_with('oxygen.OxygenLibrary')
         self.assertEqual(self.listener.run_time_data,
                          {'hello': ('I do not have a solution, but I do '
                                     'admire the problem')})