run-webkit-tests --no-build ./LayoutTests/imported/w3c/web-platform-tests should run the entire WPT suite. Instead it finds 0 tests. Found 0 tests; running 0, skipping 0. All tests skipped. run-webkit-tests --no-build LayoutTests/imported/w3c/web-platform-tests/ does find and run all of WPT that's imported in our tree. Found 32130 tests; running 26816, skipping 5314. It seems like the leading ./ is confusing the code that searches for tests. Trailing / work ok when trying to run all tests in a directory.
<rdar://problem/100663551>
I think that this is basically by design - it takes either a LayoutTests relative path or WebKit relative path, but not cwd relative.