From 42950ea06dc8f9a3b42b3b248499a5e73ad68699 Mon Sep 17 00:00:00 2001
From: Chad Stryker <chadwick@stryker5.org>
Date: Tue, 16 Jun 2020 07:28:49 -0700
Subject: [PATCH] Added a clear() in highlevel.py to prevent the
 NotImplementedError raised by the base class method. Added a test function to
 verify the fix.

---
 pyvisa-sim/highlevel.py          |  4 ++++
 pyvisa-sim/testsuite/test_all.py | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/pyvisa-sim/highlevel.py b/pyvisa-sim/highlevel.py
index d745391..27725d9 100644
--- a/pyvisa-sim/highlevel.py
+++ b/pyvisa-sim/highlevel.py
@@ -255,3 +255,7 @@ def disable_event(self, session, event_type, mechanism):
     def discard_events(self, session, event_type, mechanism):
         # TODO: implement this for GPIB finalization
         pass
+
+    def clear(self, session):
+        # Override to prevent the base class from raising a NotImplementedError
+        pass
diff --git a/pyvisa-sim/testsuite/test_all.py b/pyvisa-sim/testsuite/test_all.py
index 190d4fe..8a67f42 100644
--- a/pyvisa-sim/testsuite/test_all.py
+++ b/pyvisa-sim/testsuite/test_all.py
@@ -35,6 +35,17 @@ def test_list(resource_manager):
            }
 
 
+@pytest.mark.parametrize('resource', [
+    'ASRL1::INSTR',
+])
+def test_clear(resource, resource_manager):
+    inst = resource_manager.open_resource(resource, read_termination='\n',
+                                          write_termination='\r\n' if resource.startswith('ASRL') else '\n')
+
+    inst.clear()
+    inst.close()
+
+
 @pytest.mark.parametrize('resource', [
     'ASRL1::INSTR',
     'GPIB0::8::0::INSTR',