Fix transform to convert empty strings to NULL when changing to integer or float type #948

	name: Calculate test coverage

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- name: Check out repo
	uses: actions/checkout@v7
	- name: Set up Python
	uses: actions/setup-python@v6
	with:
	python-version: "3.11"
	cache: pip
	cache-dependency-path: pyproject.toml
	- name: Install SpatiaLite
	run: sudo apt-get install libsqlite3-mod-spatialite
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install . --group dev
	python -m pip install pytest-cov
	- name: Run tests
	run: \|-
	ls -lah
	pytest --cov=sqlite_utils --cov-report xml:coverage.xml --cov-report term
	ls -lah
	- name: Upload coverage report
	uses: codecov/codecov-action@v1
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	file: coverage.xml

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