Sorry for the stupid question

[VictorYspb]

I am just started to learn the Docker technology. Using book "Docker on Amazon Web Services" by Justin Menga.
There is an example using the acceptance.bats file with the script

setup() {
url=${APP_URL:-localhost:8000}
item='{"title": "Wash the car", "order": 1}'
location='Location: ([^[:space:]]*)'
curl -X DELETE $url/todos
}
...
@test "create todo item" {
run curl -i -X POST -H "Content-Type: application/json" $url/todos -d "$item"
[ $status = 0 ]
[[ $output =~ "201 Created" ]] || false
[[ $output =~ $location ]] || false
[ $(curl ${BASH_REMATCH[1]} | jq '.title') = $(echo "$item" | jq '.title') ] <------- this gives the error
}

While run I get error message
acceptance_1 | # (in test file acceptance.bats, line 26)
acceptance_1 | # `[ $(curl ${BASH_REMATCH[1]} | jq '.title') = $"Wash the car" ]' failed with status 2
acceptance_1 | # % Total % Received % Xferd Average Speed Time Time Time Current
acceptance_1 | # Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
acceptance_1 | # % Total % Received % Xferd Average Speed Time Time Time Current
acceptance_1 | # Dload Upload Total Spent Left Speed
100 84 100 84 0 0 2470 0 --:--:-- --:--:-- --:--:-- 2470
acceptance_1 | # /tmp/bats.1.src: line 26: [: too many arguments

Other tests run OK.
Can someone help to understand what is the bug in the script?
I am using Mac OSx
Thanks in advance

[Potherca]

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