View Source Oban.Testing (Oban v2.18.3)
This module simplifies testing workers and making assertions about enqueued jobs when testing in
:manual mode.
Assertions may be made on any property of a job, but you'll typically want to check by args,
queue or worker.
Usage
The most convenient way to use Oban.Testing is to use the module:
use Oban.Testing, repo: MyApp.RepoThat will define the helper functions you'll use to make assertions on the jobs that should (or should not) be inserted in the database while testing.
If you're using namespacing through Postgres schemas, also called "prefixes" in Ecto, you
should set the prefix option:
use Oban.Testing, repo: MyApp.Repo, prefix: "business"Unless overridden, the default prefix is public.
Adding to Case Templates
To include helpers in all of your tests you can add it to your case template:
defmodule MyApp.DataCase do
use ExUnit.CaseTemplate
using do
quote do
use Oban.Testing, repo: MyApp.Repo
import Ecto
import Ecto.Changeset
import Ecto.Query
import MyApp.DataCase
alias MyApp.Repo
end
end
endExamples
After the test helpers are imported, you can make assertions about enqueued (available or scheduled) jobs in your tests.
Here are a few examples that demonstrate what's possible:
# Assert that a job was already enqueued
assert_enqueued worker: MyWorker, args: %{id: 1}
# Assert that a job was enqueued or will be enqueued in the next 100ms
assert_enqueued [worker: MyWorker, args: %{id: 1}], 100
# Refute that a job was already enqueued
refute_enqueued queue: "special", args: %{id: 2}
# Refute that a job was already enqueued or would be enqueued in the next 100ms
refute_enqueued queue: "special", args: %{id: 2}, 100
# Make assertions on a list of all jobs matching some options
assert [%{args: %{"id" => 1}}] = all_enqueued(worker: MyWorker)
# Assert that no jobs are enqueued in any queues
assert [] = all_enqueued()Note that the final example, using all_enqueued/1, returns a raw list of matching jobs and
does not make an assertion by itself. This makes it possible to test using pattern matching at
the expense of being more verbose.
See the docs for assert_enqueued/1,2, refute_enqueued/1,2, and all_enqueued/1 for more
examples.
Matching Timestamps
In order to assert a job has been scheduled at a certain time, you will need to match against
the scheduled_at attribute of the enqueued job.
in_an_hour = DateTime.add(DateTime.utc_now(), 3600, :second)
assert_enqueued worker: MyApp.Worker, scheduled_at: in_an_hourBy default, Oban will apply a 1 second delta to all timestamp fields of jobs, so that small
deviations between the actual value and the expected one are ignored. You may configure this
delta by passing a tuple of value and a delta option (in seconds) to corresponding keyword:
assert_enqueued worker: MyApp.Worker, scheduled_at: {in_an_hour, delta: 10}Summary
Functions
Retrieve all currently enqueued jobs matching a set of options.
Assert that a job with matching fields is enqueued.
Assert that a job with particular options is or will be enqueued within a timeout period.
Construct a job and execute it with a worker module.
Refute that a job with particular options has been enqueued.
Refute that a job with particular options is or will be enqueued within a timeout period.
Change the testing mode within the context of a function.
Types
@type perform_opts() :: Oban.Job.option() | Oban.option()
Functions
@spec all_enqueued(opts :: Keyword.t()) :: [Oban.Job.t()]
Retrieve all currently enqueued jobs matching a set of options.
Only jobs matching all of the provided arguments will be returned. Additionally, jobs are returned in descending order where the most recently enqueued job will be listed first.
Examples
Assert based on only some of a job's args:
assert [%{args: %{"id" => 1}}] = all_enqueued(worker: MyWorker)Assert that exactly one job was inserted for a queue:
assert [%Oban.Job{}] = all_enqueued(queue: :alpha)Assert that there aren't any jobs enqueued for any queues or workers:
assert [] = all_enqueued()@spec assert_enqueued(opts :: Keyword.t()) :: true
Assert that a job with matching fields is enqueued.
Only values for the provided fields are checked. For example, an assertion made on worker: "MyWorker" will match any jobs for that worker, regardless of every other field.
Examples
Assert that a job is enqueued for a certain worker and args:
assert_enqueued worker: MyWorker, args: %{id: 1}Assert that a job is enqueued for a particular queue and priority:
assert_enqueued queue: :business, priority: 3Assert that a job's args deeply match:
assert_enqueued args: %{config: %{enabled: true}}Use the :_ wildcard to assert that a job's meta has a key with any value:
assert_enqueued meta: %{batch_id: :_}@spec assert_enqueued(repo :: module(), opts :: Keyword.t()) :: true
@spec assert_enqueued(opts :: Keyword.t(), timeout :: timeout()) :: true
Assert that a job with particular options is or will be enqueued within a timeout period.
See assert_enqueued/1 for additional details.
Examples
Assert that a job will be enqueued in the next 100ms:
assert_enqueued [worker: MyWorker], 100@spec perform_job(worker :: Oban.Worker.t(), args :: term(), [perform_opts()]) :: Oban.Worker.result()
Construct a job and execute it with a worker module.
This reduces boilerplate when constructing jobs for unit tests and checks for common pitfalls.
For example, it automatically converts args to string keys before calling perform/1,
ensuring that perform clauses aren't erroneously trying to match atom keys.
The helper makes the following assertions:
- That the worker implements the
Oban.Workerbehaviour - That the options provided build a valid job
- That the return is valid, e.g.
:ok,{:ok, value},{:error, value}etc.
If all of the assertions pass then the function returns the result of perform/1 for you to
make additional assertions on.
Examples
Successfully execute a job with some string arguments:
assert :ok = perform_job(MyWorker, %{"id" => 1})Successfully execute a job and assert that it returns an error tuple:
assert {:error, _} = perform_job(MyWorker, %{"bad" => "arg"})Execute a job with the args keys automatically stringified:
assert :ok = perform_job(MyWorker, %{id: 1})Exercise custom attempt handling within a worker by passing options:
assert :ok = perform_job(MyWorker, %{}, attempt: 42)Cause a test failure because the provided worker isn't real:
assert :ok = perform_job(Vorker, %{"id" => 1})@spec refute_enqueued(opts :: Keyword.t()) :: false
Refute that a job with particular options has been enqueued.
See assert_enqueued/1 for additional details.
Examples
Refute that a job is enqueued for a certain worker:
refute_enqueued worker: MyWorkerRefute that a job is enqueued for a certain worker and args:
refute_enqueued worker: MyWorker, args: %{id: 1}Refute that a job's nested args match:
refute_enqueued args: %{config: %{enabled: false}}Use the :_ wildcard to refute that a job's meta has a key with any value:
refute_enqueued meta: %{batch_id: :_}Refute that a job with particular options is or will be enqueued within a timeout period.
See assert_enqueued/1 for additional details.
Examples
Refute that a job will be enqueued in the next 100ms:
refute_enqueued [worker: MyWorker], 100Change the testing mode within the context of a function.
Only :manual and :inline mode are supported, as :disabled implies that supervised queues
and plugins are running and this function won't start any processes.
Examples
Switch to :manual mode when an Oban instance is configured for :inline testing:
Oban.Testing.with_testing_mode(:manual, fn ->
Oban.insert(MyWorker.new(%{id: 123}))
assert_enqueued worker: MyWorker, args: %{id: 123}
end)Visa-versa, switch to :inline mode:
Oban.Testing.with_testing_mode(:inline, fn ->
{:ok, %Job{state: "completed"}} = Oban.insert(MyWorker.new(%{id: 123}))
end)