This patch adds an additional *isinstance* check within the ast parser to check
for float along with int, fixing the underlying issue.
Co-Authored: Markus Heiser <markus.heiser@darmarit.de>
This commit includes some refactoring in unit tests. As we test more plugins,
it seems unweildy to include every test class in the test_plugins.py file. This
patch split apart all of the test plugins to their own respective files,
including the new test_plugin_calculator.py file.