Throw exception when mapping non-flat values in flat typed properties #22

	name: JsonMapper tests
	on: [push, workflow_dispatch]
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	php-versions:
	- '7.1'
	- '7.2'
	- '7.3'
	- '7.4'
	- '8.0'
	- '8.1'
	- '8.2'
	name: PHP ${{ matrix.php-versions }}
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php-versions }}
	tools: composer
	coverage: xdebug

	- name: Get composer cache directory
	id: composer-cache
	run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT

	- name: Cache dependencies
	uses: actions/cache@v3
	with:
	path: ${{ steps.composer-cache.outputs.dir }}
	key: ${{ runner.os }}-composer-${{ matrix.php-versions }}-${{ hashFiles('**/composer.lock') }}
	restore-keys: ${{ runner.os }}-composer-${{ matrix.php-versions }}-

	- name: Install dependencies
	run: composer install --no-interaction --prefer-dist

	- name: Run unit tests
	run: XDEBUG_MODE=coverage ./vendor/bin/phpunit --coverage-text

	- name: Check codestyle
	run: ./vendor/bin/phpcs --standard=PEAR src/

Provide feedback