simlyfy

tests/README.md

@@ -237,3 +237,34 @@ Attribute changes were verified with `qmake6 ../dbc.pro`, `make -j4`, and
 `make check` in `build/`: all six QtTest suites and the qmake tree target
 passed. The standalone C++17 tree test also passed. The existing named
 comma-decimal C locale test skipped because the locale is not installed.
+
+## Extended validation
+
+`attributeNumbers` checks signed 64-bit limits, leading plus signs, decimal HEX
+values, FLOAT fractions/exponents, and default overrides under a comma-decimal
+C++ locale. Node/environment defaults remain on definitions without becoming
+database attributes. `invalidAttributeNumbers` supplies 39 data rows, each checked
+in both definition bounds, a default, and an explicit assignment. The throwing
+and diagnostic APIs must reject malformed signs, trailing text, hexadecimal
+notation, non-finite values, overflow, and underflow with the correct error line.
+Additional malformed-attribute cases cover token separators, scope/type names,
+reversed FLOAT bounds, value types/ranges, and invalid CAN references.
+
+Run AddressSanitizer and UndefinedBehaviorSanitizer in a separate directory:
+
+```sh
+mkdir -p build-sanitize
+cd build-sanitize
+qmake6 ../dbc.pro CONFIG+=dbc_qt CONFIG+=debug CONFIG-=release \
+  'QMAKE_CXXFLAGS+=-fsanitize=address,undefined -fno-omit-frame-pointer' \
+  'QMAKE_LFLAGS+=-fsanitize=address,undefined'
+make -j4
+ASAN_OPTIONS=detect_leaks=0 UBSAN_OPTIONS=halt_on_error=1 \
+  QT_FATAL_WARNINGS=1 LOCPATH=/tmp/dbc-test-locales make check
+```
+
+Generate the optional German locale as described above before setting LOCPATH.
+LeakSanitizer cannot run under this environment's tracer: `detect_leaks=1`
+completes the core QtTest suites but fails during leak checking with the message
+that LeakSanitizer does not work under ptrace. Disabling leak checking retains
+AddressSanitizer and UndefinedBehaviorSanitizer checks; it does not verify leaks.