name: ort-test description: Run ONNX Runtime tests. Use this skill when asked to run tests, debug test failures, or find and execute specific test cases in ONNX Runtime.

Running ONNX Runtime Tests

ONNX Runtime uses Google Test for C++ and unittest (preferred) / pytest for Python.

C++ tests

Test executables

Use --gtest_filter to select specific tests:

./onnxruntime_provider_test --gtest_filter="*Conv3D*"

Running tests

Always run from the build output directory — tests may fail to find dependencies otherwise.

# Linux
cd build/Linux/Release
./onnxruntime_provider_test --gtest_filter="*TestName*"

# macOS
cd build/MacOS/Release
./onnxruntime_provider_test --gtest_filter="*TestName*"

# Windows
cd build\Windows\Release
.\onnxruntime_provider_test.exe --gtest_filter="*TestName*"

You can also run all tests via the build script (assumes a prior successful build):

./build.sh --config Release --test
.\build.bat --config Release --test    # Windows

Locating the build output directory

The default path follows the pattern build/<Platform>/<Config>/ where Platform is Linux, MacOS, or Windows. With Visual Studio multi-config generators on Windows, the config may appear twice (e.g., build/Windows/Release/Release/). The path can also be customized via --build_dir.

If you can't find a test binary, search for it:

# Windows
Get-ChildItem -Path build -Recurse -Filter "onnxruntime_provider_test.exe" | Select-Object -ExpandProperty FullName

# Linux/macOS
find build -name "onnxruntime_provider_test" -type f

Python tests

Use pytest as the test runner:

pytest onnxruntime/test/python/test_specific.py                          # entire file
pytest onnxruntime/test/python/test_specific.py::TestClass::test_method  # specific test
pytest -k "test_keyword" onnxruntime/test/python/                        # by keyword

Python test naming convention: test_<method>_<expected_behavior>_[when_<condition>]

Agent tips

• Activate a Python virtual environment before running tests. See "Python > Virtual environment" in AGENTS.md.
• Redirect test output to a file (e.g., > test_output.txt 2>&1) — output can be large.
• For C++ tests, verify the build directory exists and a prior build completed before running.
• Use --gtest_filter to run a targeted subset when the full suite takes too long.