test: ProjectConf: Add unit tests

Add unit tests for the new ProjectConf module covering:
  - Basic string and list value retrieval (get_str(), get_str_or_none(),
    get_list(), get_list_or_none())
  - Quoted values with preserved spaces and comment delimiters
  - Inline comments outside quotes
  - Comma-separated lists with quoted commas
  - Line continuations
  - Multiple sections
  - Error cases: empty key, missing key/section, malformed sections,
    unfinished continuations, unclosed quotes
  - Error class is a subclass of ValueError
Also include a Makefile for running tests via `make test`.
Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev
Signed-off-by: Jan Lindemann <jan@janware.com>

test/unit/python/jw/pkg/lib/ProjectConf/Makefile

@@ -0,0 +1,7 @@
+TOPDIR = ../../../../../../..
+
+include $(TOPDIR)/make/proj.mk
+include $(JWBDIR)/make/py-run.mk
+
+all:
+test: run

test/unit/python/jw/pkg/lib/ProjectConf/test.py

@@ -0,0 +1,253 @@
+import tempfile
+from jw.pkg.lib.ProjectConf import ProjectConf
+
+# -- Helper: create temp file and read it --
+
+def _load(text: str) -> ProjectConf:
+    with tempfile.NamedTemporaryFile(mode='w', suffix='.conf', delete=False) as f:
+        f.write(text)
+        f.flush()
+        return ProjectConf.read(f.name)
+
+# -- Basic construction --
+
+pc = _load('[section]\nkey = value\n')
+assert pc.get_str('section', 'key') == 'value'
+
+# -- get_section returns raw section text --
+
+pc = _load('[meta]\n# header comment\nkey = val\n\n')
+section = pc.get_section('meta')
+assert section is not None
+assert '# header comment' in section
+assert 'key = val' in section
+
+# -- get_section returns None for missing section --
+
+pc = _load('[section]\nkey = value\n')
+assert pc.get_section('nonexistent') is None
+
+# -- get_str returns unquoted value --
+
+pc = _load('[section]\nkey = "hello world"\n')
+assert pc.get_str('section', 'key') == 'hello world'
+
+# -- get_str returns raw value when not quoted --
+
+pc = _load('[section]\nkey = plain value\n')
+assert pc.get_str('section', 'key') == 'plain value'
+
+# -- get_str raises Error when key missing --
+
+pc = _load('[section]\nother = val\n')
+try:
+    pc.get_str('section', 'missing')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- get_str raises Error when section missing --
+
+pc = _load('[section]\nkey = val\n')
+try:
+    pc.get_str('nonexistent', 'key')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- get_str_or_none returns None for missing key --
+
+pc = _load('[section]\nother = val\n')
+assert pc.get_str_or_none('section', 'missing') is None
+
+# -- get_str_or_none returns None for missing section --
+
+pc = _load('[section]\nkey = val\n')
+assert pc.get_str_or_none('nonexistent', 'key') is None
+
+# -- get_str returns string with trailing whitespace stripped --
+
+pc = _load('[section]\nkey = value  \n')
+assert pc.get_str('section', 'key') == 'value'
+
+# -- Quoted value with spaces preserved --
+
+pc = _load('[section]\nkey = "  spaced  "\n')
+assert pc.get_str('section', 'key') == '  spaced  '
+
+# -- Quoted hash inside quotes is preserved --
+
+pc = _load('[section]\nkey = "value # not a comment"\n')
+assert pc.get_str('section', 'key') == 'value # not a comment'
+
+# -- Inline comment outside quotes --
+
+pc = _load('[section]\nkey = value # this is a comment\n')
+assert pc.get_str('section', 'key') == 'value'
+
+# -- Quoted value containing an inline comment delimiter --
+
+pc = _load('[section]\nkey = "has # inside"\n')
+assert pc.get_str('section', 'key') == 'has # inside'
+
+# -- get_list returns split values --
+
+pc = _load('[section]\nlist = a, b, c\n')
+assert pc.get_list('section', 'list') == ['a', 'b', 'c']
+
+# -- get_list returns single value --
+
+pc = _load('[section]\nlist = single\n')
+assert pc.get_list('section', 'list') == ['single']
+
+# -- get_list_or_none returns None for missing key --
+
+pc = _load('[section]\nother = val\n')
+assert pc.get_list_or_none('section', 'missing') is None
+
+# -- get_list raises Error when missing key --
+
+pc = _load('[section]\nother = val\n')
+try:
+    pc.get_list('section', 'missing')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- get_list handles quoted commas --
+
+pc = _load('[section]\nlist = "a, b", c, "d, e"\n')
+assert pc.get_list('section', 'list') == ['a, b', 'c', 'd, e']
+
+# -- get_list returns empty list for empty value --
+
+pc = _load('[section]\nlist = \n')
+assert pc.get_list('section', 'list') == []
+
+# -- get_list_or_none returns empty list for empty value --
+
+pc = _load('[section]\nlist = \n')
+assert pc.get_list_or_none('section', 'list') == []
+
+# -- Unclosed quote in list raises --
+
+pc = _load('[section]\nlist = "unclosed, b\n')
+try:
+    pc.get_list('section', 'list')
+    assert False, 'Should have raised'
+except ProjectConf.Error as exc:
+    assert 'Unclosed quote' in str(exc)
+
+# -- Line continuation --
+
+pc = _load('[section]\nkey = first \\\n  second \\\n  third\n')
+assert pc.get_str('section', 'key') == 'first second third'
+
+# -- Line continuation with inline comment at end --
+
+pc = _load('[section]\nkey = first \\\n  second # comment\n')
+assert pc.get_str('section', 'key') == 'first second'
+
+# -- get_section returns None for non-existent section --
+
+pc = _load('[section]\nkey = val\n')
+assert pc.get_section('does_not_exist') is None
+
+# -- Multiple keys in same section --
+
+pc = _load('[section]\nfirst = one\nsecond = two\nthird = three\n')
+assert pc.get_str('section', 'first') == 'one'
+assert pc.get_str('section', 'second') == 'two'
+assert pc.get_str('section', 'third') == 'three'
+
+# -- get_str_or_none does not raise for missing section --
+
+pc = _load('[section]\nkey = val\n')
+assert pc.get_str_or_none('nope', 'key') is None
+
+# -- get_list_or_none does not raise for missing section --
+
+pc = _load('[section]\nkey = val\n')
+assert pc.get_list_or_none('nope', 'key') is None
+
+# -- get_list_or_none does not raise for missing key --
+
+pc = _load('[section]\nother = val\n')
+assert pc.get_list_or_none('section', 'nope') is None
+
+# -- Empty key raises --
+
+pc = _load('[section]\n= value\n')
+try:
+    pc.get_str('section', '')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- Not an assignment raises --
+
+pc = _load('[section]\nnot an assignment\n')
+try:
+    pc.get_str('section', 'not an assignment')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- Unfinished continuation raises --
+
+pc = _load('[section]\nkey = value \\\n')
+try:
+    pc.get_str('section', 'key')
+    assert False, 'Should have raised'
+except ProjectConf.Error:
+    pass
+
+# -- Error class is ValueError --
+
+pc = _load('[section]\nkey = val\n')
+try:
+    pc.get_str('missing', 'key')
+except ValueError as e:
+    assert isinstance(e, ValueError)
+else:
+    assert False, 'Should have raised ValueError'
+
+# -- Whitespace around key and value --
+
+pc = _load('[section]\n  key  =  value  \n')
+assert pc.get_str('section', 'key') == 'value'
+
+# -- Whitespace around key in list --
+
+pc = _load('[section]\nlist =  a  ,  b  ,  c  \n')
+assert pc.get_list('section', 'list') == ['a', 'b', 'c']
+
+# -- Multiple sections --
+
+pc = _load('[one]\nkey = val1\n[two]\nkey = val2\n')
+assert pc.get_str('one', 'key') == 'val1'
+assert pc.get_str('two', 'key') == 'val2'
+
+# -- Section with only comments and blanks --
+
+pc = _load('[empty]\n# just a comment\n\n')
+section = pc.get_section('empty')
+assert section is not None
+assert pc.get_str_or_none('empty', 'key') is None
+
+# -- Section with trailing comment on section header line --
+
+pc = _load('[section] # inline comment\nkey = val\n')
+assert pc.get_str('section', 'key') == 'val'
+
+# -- Value that looks like a section header --
+
+pc = _load('[section]\nnot_a_key = [bracket]\n')
+assert pc.get_str('section', 'not_a_key') == '[bracket]'
+
+# -- Multiple values with trailing backslash comments --
+
+pc = _load('[section]\nlist = "a", "b", "c"\n')
+assert pc.get_list('section', 'list') == ['a', 'b', 'c']
+
+print('All ProjectConf tests passed')