BUG: Tests show figures

[JanniRoebbecke]

What is the issue?

• when executed with show figures 8 tests fail

  FAILED tests/protzilla/data_analysis/test_analysis_plots.py::test_plots_volcano_plot_multiple_annotations - AttributeError: 'list' object has no attribute 'show'
  FAILED tests/protzilla/data_analysis/test_differential_expression.py::test_differential_expression_linear_model - AttributeError: 'list' object has no attribute 'show'
  FAILED tests/protzilla/data_analysis/test_differential_expression.py::test_differential_expression_student_t_test - AttributeError: 'list' object has no attribute 'show'
  FAILED tests/protzilla/data_analysis/test_differential_expression.py::test_differential_expression_welch_t_test - AttributeError: 'list' object has no attribute 'show'
  FAILED tests/protzilla/data_analysis/test_differential_expression.py::test_differential_expression_t_test_with_zero_mean - AttributeError: 'list' object has no attribute 'show'
  FAILED tests/protzilla/data_analysis/test_plots_data_analysis.py::test_prot_quant_plot - AttributeError: 'dict' object has no attribute 'show'
  FAILED tests/protzilla/data_integration/test_enrichment_analysis.py::test_GO_analysis_Enrichr_wrong_background_file - xml.etree.ElementTree.ParseError: mismatched tag: line 62, column 2
  ======================================================================== 12 failed, 311 passed, 88 warnings in 129.44s (0:02:09) ======================================================================== 

How to reproduce the issue?

• run all tests or the tests above with additional arguments --show-figures
• for example by running pytest --show-figures /test

What is the expected behavior?

• all tests should pass