Add script to run pylibcudf tests (#17882)

This is a small change adding a script to run pylibcudf tests, like we have for other Python libraries in this repository.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - Matthew Murray (https://github.com/Matt711)
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: #17882

ci/run_pylibcudf_pytests.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Copyright (c) 2025, NVIDIA CORPORATION.
+
+set -euo pipefail
+
+# It is essential to cd into python/pylibcudf/pylibcudf as `pytest-xdist` + `coverage` seem to work only at this directory level.
+
+# Support invoking run_cudf_pytests.sh outside the script directory
+cd "$(dirname "$(realpath "${BASH_SOURCE[0]}")")"/../python/pylibcudf/pylibcudf/
+
+pytest --cache-clear --ignore="benchmarks" "$@" tests

ci/test_python_common.sh

@@ -41,4 +41,5 @@ rapids-mamba-retry install \
   --channel "${CPP_CHANNEL}" \
   --channel "${PYTHON_CHANNEL}" \
   "cudf=${RAPIDS_VERSION}" \
+  "pylibcudf=${RAPIDS_VERSION}" \
   "libcudf=${RAPIDS_VERSION}"

ci/test_python_cudf.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) 2022-2024, NVIDIA CORPORATION.
+# Copyright (c) 2022-2025, NVIDIA CORPORATION.
 
 # Support invoking test_python_cudf.sh outside the script directory
 cd "$(dirname "$(realpath "${BASH_SOURCE[0]}")")"/../;
@@ -15,12 +15,14 @@ trap "EXITCODE=1" ERR
 set +e
 
 rapids-logger "pytest pylibcudf"
-pushd python/pylibcudf/pylibcudf/tests
-python -m pytest \
-  --cache-clear \
+./ci/run_pylibcudf_pytests.sh \
+  --junitxml="${RAPIDS_TESTS_DIR}/junit-pylibcudf.xml" \
+  --numprocesses=8 \
   --dist=worksteal \
-  .
-popd
+  --cov-config=../.coveragerc \
+  --cov=pylibcudf \
+  --cov-report=xml:"${RAPIDS_COVERAGE_DIR}/pylibcudf-coverage.xml" \
+  --cov-report=term
 
 rapids-logger "pytest cudf"
 ./ci/run_cudf_pytests.sh \

python/pylibcudf/.coveragerc

@@ -0,0 +1,3 @@
+# Configuration file for Python coverage tests
+[run]
+source = pylibcudf