Add tests for toml_incompatibilities

tests/plugins/test_toml_incompatibilities.py

@@ -0,0 +1,50 @@
+import logging
+
+import pytest
+
+from ini2toml.drivers import configparser, configupdater
+from ini2toml.plugins import toml_incompatibilities as plugin
+from ini2toml.translator import Translator
+
+EXAMPLE_FLAKE8 = """
+[flake8]
+# Some sane defaults for the code style checker flake8
+# black compatibility
+max_line_length = 88
+# E203 and W503 have edge cases handled by black
+extend_ignore = E203, W503
+exclude =
+    src/pyscaffold/contrib
+    .tox
+    build
+    dist
+    .eggs
+    docs/conf.py
+"""
+
+EXAMPLE_DEVPI = """
+[devpi:upload]
+# Options for the devpi: PyPI server and packaging tool
+# VCS export must be deactivated since we are using setuptools-scm
+no_vcs = 1
+formats = bdist_wheel
+"""
+
+EXAMPLES = {
+    "flake8": (".flake8", "flake8", EXAMPLE_FLAKE8),
+    "flake8-setup.cfg": ("setup.cfg", "flake8", EXAMPLE_FLAKE8),
+    "devpi-setup.cfg": ("setup.cfg", "devpi:upload", EXAMPLE_DEVPI),
+}
+
+
+@pytest.mark.parametrize("example", EXAMPLES.keys())
+@pytest.mark.parametrize("convert", (configparser.parse, configupdater.parse))
+def test_log_warnings(example, convert, caplog):
+    """ini2toml should display a warning via the logging system"""
+    profile, section, content = EXAMPLES[example]
+    translator = Translator(plugins=[plugin.activate], ini_loads_fn=convert)
+    caplog.clear()
+    with caplog.at_level(logging.WARNING):
+        translator.translate(content, profile)
+    expected = plugin._warning_text(profile, repr(section))
+    assert expected in caplog.text