Fix nil point error for the position api #18

	name: Unittest

	on:
	push:
	paths:
	- 'core/**'
	- 'server/**'
	- 'tests/**'
	# Triggers the workflow on push or pull request events but only for the master branch
	pull_request:
	paths:
	- 'core/**'
	- 'server/**'
	- 'tests/**'


	jobs:
	# This workflow contains a single job called "build"
	build:
	name: Unittest AMD64 Ubuntu ${{ matrix.ubuntu }}
	# The type of runner that the job will run on
	runs-on: ubuntu-latest
	timeout-minutes: 30
	strategy:
	fail-fast: false
	matrix:
	ubuntu: [18.04]
	env:
	UBUNTU: ${{ matrix.ubuntu }}
	services:
	mysql:
	image: mysql:5.7.42
	env:
	MYSQL_ROOT_PASSWORD: 123456
	MYSQL_DATABASE: milvuscdc
	ports:
	- 3306:3306
	etcd:
	image: quay.io/coreos/etcd:v3.5.5
	env:
	ETCD_ADVERTISE_CLIENT_URLS: http://0.0.0.0:2379
	ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
	ports:
	- 2379:2379
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v3
	# Runs a single command using the runners shell
	- name: Run Unittest
	run: make test-go
	- name: Upload coverage to Codecov
	if: github.repository == 'zilliztech/milvus-cdc'
	uses: codecov/codecov-action@v1
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	file: ./coverage.project.out
	name: ubuntu-${{ matrix.ubuntu }}-unittests

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