fix backward pass for cached losses #1280

	name: Unit tests

	on:
	push:
	branches:
	- master
	- v*-release
	pull_request:
	branches:
	- master
	- v*-release
	workflow_dispatch:

	jobs:

	test_sampling:
	name: Run unit tests
	strategy:
	matrix:
	python-version: ['3.9', '3.10', '3.11', '3.12']
	os: [ubuntu-latest, windows-latest]
	fail-fast: false
	runs-on: ${{ matrix.os }}
	steps:
	- name: Remove unnecessary files
	run: \|
	df -h /
	# Remove software and language runtimes we're not using
	sudo rm -rf \
	"$AGENT_TOOLSDIRECTORY" \
	/opt/google/chrome \
	/opt/microsoft/msedge \
	/opt/microsoft/powershell \
	/opt/pipx \
	/usr/lib/mono \
	/usr/local/julia* \
	/usr/local/lib/android \
	/usr/local/lib/node_modules \
	/usr/local/share/chromium \
	/usr/local/share/powershell \
	/usr/share/dotnet \
	/usr/share/swift
	df -h /
	if: runner.os == 'Linux'

	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Python environment
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Try to load cached dependencies
	uses: actions/cache@v4
	id: restore-cache
	with:
	path: ${{ env.pythonLocation }}
	key: python-dependencies-${{ matrix.os }}-${{ matrix.python-version }}-${{ hashFiles('pyproject.toml') }}-${{ env.pythonLocation }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install '.[train, onnx, openvino, dev]'

	- name: Install model2vec
	run: python -m pip install model2vec
	if: ${{ contains(fromJSON('["3.10", "3.11", "3.12"]'), matrix.python-version) }}

	- name: Run unit tests
	run: \|
	python -m pytest --durations 20 -sv tests/

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