Merge pull request #2664 from A5rocks/faster-mypy-tests

Make the mypy-based tests faster!

Author: jakkdl

ci.sh

@@ -103,6 +103,12 @@ else
     INSTALLDIR=$(python -c "import os, trio; print(os.path.dirname(trio.__file__))")
     cp ../pyproject.toml $INSTALLDIR
 
+    # TODO: remove this once we have a py.typed file
+    touch "$INSTALLDIR/py.typed"
+
+    # get mypy tests a nice cache
+    MYPYPATH=".." mypy --config-file= --cache-dir=./.mypy_cache -c "import trio" >/dev/null 2>/dev/null || true
+
     if pytest -r a -p trio._tests.pytest_plugin --junitxml=../test-results.xml --run-slow ${INSTALLDIR} --cov="$INSTALLDIR" --cov-report=xml --cov-config=../.coveragerc --verbose; then
         PASSED=true
     else