Additional tests

tests/README.md

@@ -1,5 +1,8 @@
 # QtTest regression tests
 
+For instrumented builds, LCOV HTML reports, Qt Creator coverage configuration,
+and Coco installation, see [Measuring code coverage](../README.md#measuring-code-coverage).
+
 Open the repository's root `dbc.pro` in Qt Creator. It contains `core` (a static
 C++17 library) and `tests` (the `dbc_tests` QtTest executable). Core is built first;
 tests link its archive rather than compiling its implementation again.