fix: upstream discovery args metadata field caused crash. (#2832) #5126

	name: Backend Unit Test

	on:
	push:
	branches:
	- master
	paths:
	- 'api/**'
	pull_request:
	branches:
	- master
	paths:
	- 'api/**'

	jobs:
	run-test:
	runs-on: ubuntu-latest

	services:
	etcd:
	image: bitnami/etcd:3.5.2
	ports:
	- 2379:2379
	- 2380:2380
	env:
	ALLOW_NONE_AUTHENTICATION: yes

	steps:
	- uses: actions/checkout@v3

	- name: setup go
	uses: actions/setup-go@v3
	with:
	go-version: "1.18"

	- uses: actions/cache@v3
	with:
	path: \|
	~/.cache/go-build
	~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: run test
	run: \|
	make api-test

	- name: upload coverage profile
	working-directory: ./api
	run: \|
	bash <(curl -s https://codecov.io/bash) -F backend-unit-test

	- name: run with custom port
	working-directory: ./api
	run: \|
	export GO111MOUDULE=on
	export APISIX_CONF_PATH=$PWD/conf
	sed -i 's/9000/8088/' conf/conf.yaml
	go build -o ./manager-api ./main.go
	./manager-api > ./api.log 2>&1 &
	sleep 2
	cat ./api.log
	cat conf/conf.yaml

	- name: run with custom port
	working-directory: ./api
	run: \|
	curl http://127.0.0.1:8088/apisix/admin/user/login -X POST -i -d '{"username":"admin", "password": "admin"}'
	code=$(curl -k -i -m 20 -o /dev/null -s -w %{http_code} http://127.0.0.1:8088/apisix/admin/user/login -X POST -i -d '{"username":"admin", "password": "admin"}')
	if [ ! $code -eq 200 ]; then
	echo "failed: failed to custom port"
	exit 1
	fi

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