Avoid duplicate dask-cudf testing (#15333)

Sets `DASK_DATAFRAME__QUERY_PLANNING` explicitly in tests to avoid duplicate testing of dask-expr once dask version is unpinned.

Authors:
  - Richard (Rick) Zamora (https://github.com/rjzamora)

Approvers:
  - Vyas Ramasubramani (https://github.com/vyasr)
  - GALI PREM SAGAR (https://github.com/galipremsagar)
  - Peter Andreas Entschev (https://github.com/pentschev)
  - Ray Douglass (https://github.com/raydouglass)

URL: #15333

ci/test_python_other.sh

@@ -19,8 +19,8 @@ EXITCODE=0
 trap "EXITCODE=1" ERR
 set +e
 
-rapids-logger "pytest dask_cudf"
-./ci/run_dask_cudf_pytests.sh \
+rapids-logger "pytest dask_cudf (dask-expr)"
+DASK_DATAFRAME__QUERY_PLANNING=True ./ci/run_dask_cudf_pytests.sh \
   --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf.xml" \
   --numprocesses=8 \
   --dist=worksteal \
@@ -29,10 +29,9 @@ rapids-logger "pytest dask_cudf"
   --cov-report=xml:"${RAPIDS_COVERAGE_DIR}/dask-cudf-coverage.xml" \
   --cov-report=term
 
-# Run tests in dask_cudf/tests and dask_cudf/io/tests with dask-expr
-rapids-logger "pytest dask_cudf + dask_expr"
-DASK_DATAFRAME__QUERY_PLANNING=True ./ci/run_dask_cudf_pytests.sh \
-  --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf-expr.xml" \
+rapids-logger "pytest dask_cudf (legacy)"
+DASK_DATAFRAME__QUERY_PLANNING=False ./ci/run_dask_cudf_pytests.sh \
+  --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf-legacy.xml" \
   --numprocesses=8 \
   --dist=loadscope \
   .

ci/test_wheel_dask_cudf.sh

@@ -31,19 +31,19 @@ RAPIDS_TESTS_DIR=${RAPIDS_TESTS_DIR:-"${RESULTS_DIR}/test-results"}/
 mkdir -p "${RAPIDS_TESTS_DIR}"
 
 # Run tests in dask_cudf/tests and dask_cudf/io/tests
-rapids-logger "pytest dask_cudf"
+rapids-logger "pytest dask_cudf (dask-expr)"
 pushd python/dask_cudf/dask_cudf
-python -m pytest \
+DASK_DATAFRAME__QUERY_PLANNING=True python -m pytest \
   --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf.xml" \
   --numprocesses=8 \
   .
 popd
 
-# Run tests in dask_cudf/tests and dask_cudf/io/tests with dask-expr
-rapids-logger "pytest dask_cudf + dask_expr"
+# Run tests in dask_cudf/tests and dask_cudf/io/tests (legacy)
+rapids-logger "pytest dask_cudf (legacy)"
 pushd python/dask_cudf/dask_cudf
-DASK_DATAFRAME__QUERY_PLANNING=True python -m pytest \
-  --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf-expr.xml" \
+DASK_DATAFRAME__QUERY_PLANNING=False python -m pytest \
+  --junitxml="${RAPIDS_TESTS_DIR}/junit-dask-cudf-legacy.xml" \
   --numprocesses=8 \
   .
 popd