Fix FilterMessages transform [bug:#435].

The "Messages" transform no longer tests for to-be-ignored messages
but inserts all `system-messages` without parent into a
"System Messages" section.
This allows the "FilterMessages" transform to find and convert
matching `problematic` nodes (but now it also has to remove the
"System Messages" section if empty).

git-svn-id: https://svn.code.sf.net/p/docutils/code/trunk@8997 929543f6-e4f2-0310-98a6-ba3bd3dd1d04

1 files changed, 75 insertions, 0 deletions

diff --git a/docutils/test/test_transforms/test_filter_messages.py b/docutils/test/test_transforms/test_filter_messages.py
new file mode 100644
index 000000000..db1250d43
--- /dev/null
+++ b/docutils/test/test_transforms/test_filter_messages.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+
+# $Id$
+# :Copyright: © 2021 Günter Milde.
+# :Maintainer: docutils-develop@lists.sourceforge.net
+# :License: Released under the terms of the `2-Clause BSD license`_, in short:
+#
+#    Copying and distribution of this file, with or without modification,
+#    are permitted in any medium without royalty provided the copyright
+#    notice and this notice are preserved.
+#    This file is offered as-is, without any warranty.
+#
+# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
+
+"""
+Tests for docutils.transforms.universal.FilterMessages.
+"""
+
+if __name__ == '__main__':
+    import __init__
+from test_transforms import DocutilsTestSupport
+from docutils.transforms.universal import Messages, FilterMessages
+from docutils.transforms.references import Substitutions
+from docutils.parsers.rst import Parser
+
+
+def suite():
+    parser = Parser()
+    settings = {'report_level': 5} # filter all system messages
+    s = DocutilsTestSupport.TransformTestSuite(
+        parser, suite_settings=settings)
+    s.generateTests(totest)
+    return s
+
+totest = {}
+
+totest['system_message_sections'] = ((Substitutions, Messages, FilterMessages), [
+["""\
+.. unknown-directive:: block markup is filtered without trace.
+""",
+"""\
+<document source="test data">
+"""],
+["""\
+Invalid *inline markup is restored to text.
+""",
+"""\
+<document source="test data">
+    <paragraph>
+        Invalid \n\
+        *
+        inline markup is restored to text.
+"""],
+["""\
+This |unknown substitution| will generate a system message, thanks to
+the "Substitutions" transform. The "Messages" transform will
+generate a "System Messages" section and the "FilterMessages" transform
+will remove it.
+""",
+"""\
+<document source="test data">
+    <paragraph>
+        This \n\
+        |unknown substitution|
+         will generate a system message, thanks to
+        the "Substitutions" transform. The "Messages" transform will
+        generate a "System Messages" section and the "FilterMessages" transform
+        will remove it.
+"""],
+])
+
+
+if __name__ == '__main__':
+    import unittest
+    unittest.main(defaultTest='suite')