Kindleman (UK)
Testing With Rails ActiveStorage
In an app I have been working on recently, I have a report model, with an attachment image, “overview”. This is an image uploaded to the app via the ActiveStorage gem that now ships with Rails.
To test this, I started by checking that when the attachment exists, it is returned properly when fetching the records via the applications Json API.
Set Up Fixtures
First of all, you need some data to work with. The thing to note here is to put the fixtures in the active_storage dir.
# test/fixtures/active_storage/blobs.yml
one:
id: 1
key: '111'
filename: 'broom.png'
content_type: 'image/png'
metadata: nil
byte_size: 1686342
checksum: "123456789012345678901234"
Now associate those blobs with some records. Note it is polymorphic so you set the record type and record_id. That associates your record from your model, with the blob specified above.
# test/fixtures/active_storage/attachments.yml
one:
name: 'overview'
record_type: 'PointOfWorkRiskAssessment'
record_id: <%= ActiveRecord::FixtureSet.identify(:point_of_work_risk_assessment_one) %>
blob_id: 1
Check the asset is linked properly in a json_response.
require 'test_helper'
module Api
class JobsTest < ActionDispatch::IntegrationTest
include Devise::Test::IntegrationHelpers
setup do
@user = users(:user_one)
@header = {
'X-User-Email': @user.email,
'X-User-Token': @user.authentication_token
}
end
test "can see job data" do
@job = jobs(:job_one)
get api_job_path(@job), headers: @header
json_response = JSON.parse(response.body)
assert_match /http/, json_response["job"]["workspans"][0]['workspan']['reports'][0]['report']['point_of_work_risk_assessment']['overview']
end
end
end
Testing that your controllers are processing attachments is also fairly straightforward. Just use fixture_file_upload to create a file and post. Couldn’t be simpler!
require 'test_helper'
module Api
class ActivitiesControllerTest < ActionDispatch::IntegrationTest
setup do
@user = users(:user_one)
@header = {
'X-User-Email': @user.email,
'X-User-Token': @user.authentication_token
}
end
test "create_activity" do
file = fixture_file_upload('test/fixtures/files/broom.png', 'image/png')
activity_params = {
user_id: @user.id,
starts_at: Time.now - 20.minutes,
start_image: file
}
post api_activities_path,
headers: @header,
params: {activity: activity_params}
assert_response :success
activity = JSON.parse(@response.body)['activity']
assert Activity.find(activity["id"]).start_image.attached?
assert activity['user_id'] == @user.id
end
end
end