bamboo v0.6.0 Bamboo.Test
Helpers for testing email delivery
Use these helpers with Bamboo.TestAdapter to test email delivery. Typically you’ll want to unit test emails first. Then in integration tests use helpers from this module to test whether that email was delivered.
Note on sending from other processes
If you are sending emails from another process (for example, from inside a
Task or GenServer) you may need to use shared mode when using
Bamboo.Test
. See the docs __using__/1
for an example.
For most scenarios you will not need shared mode.
In your config
# Typically in config/test.exs
config :my_app, MyApp.Mailer,
adapter: Bamboo.TestAdapter
Unit test
You don’t need any special functions to unit test emails.
defmodule MyApp.EmailsTest do
use ExUnit.Case
test "welcome email" do
user = %User{name: "John", email: "person@example.com"}
email = MyApp.Email.welcome_email(user)
assert email.to == user
assert email.subject == "This is your welcome email"
assert email.html_body =~ "Welcome to the app"
end
end
Integration test
defmodule MyApp.Email do
import Bamboo.Email
def welcome_email(user) do
new_email(
from: "me@app.com",
to: user,
subject: "Welcome!",
text_body: "Welcome to the app",
html_body: "<strong>Welcome to the app</strong>"
)
end
end
defmodule MyApp.EmailDeliveryTest do
use ExUnit.Case
use Bamboo.Test
test "sends welcome email" do
user = %User{...}
email = MyApp.Email.welcome_email(user)
email |> MyApp.Mailer.deliver_now
# Works with deliver_now and deliver_later
assert_delivered_email MyAppEmail.welcome_email(user)
end
end
Summary
Functions
Checks whether an email was delivered
Checks that no emails were sent
Ensures a particular email was not sent
Macros
Imports Bamboo.Test and Bamboo.Formatter.format_email_address/2
Functions
Checks whether an email was delivered.
Must be used with the Bamboo.TestAdapter
or this will never pass. In case you
are delivering from another process, the assertion waits up to 100ms before
failing. Typically if an email is successfully delivered the assertion will
pass instantly, so test suites will remain fast.
Examples
email = Bamboo.Email.new_email(subject: "something")
email |> MyApp.Mailer.deliver
assert_delivered_email(email) # Will pass
unsent_email = Bamboo.Email.new_email(subject: "something else")
assert_delivered_email(unsent_email) # Will fail
Checks that no emails were sent.
If Bamboo.Test
is used with shared mode, you must also configure a timeout
in your test config.
# Set this in your config, typically in config/test.exs
config :bamboo, :refute_timeout, 10
The value you set is up to you. Lower values will result in faster tests, but may incorrectly pass if an email is delivered after the timeout. Often times 1ms is enough.
Ensures a particular email was not sent
Same as assert_delivered_email/0
, except it checks that a particular email
was not sent.
If Bamboo.Test
is used with shared mode, you must also configure a timeout
in your test config.
# Set this in your config, typically in config/test.exs
config :bamboo, :refute_timeout, 10
The value you set is up to you. Lower values will result in faster tests, but may incorrectly pass if an email is delivered after the timeout. Often times 1ms is enough.
Macros
Imports Bamboo.Test and Bamboo.Formatter.format_email_address/2
Bamboo.Test
and the Bamboo.TestAdapter
work by sending a message to the
current process when an email is delivered. The process mailbox is then
checked when using the assertion helpers like assert_delivered_email/1
.
Sometimes emails don’t show up when asserting because you may deliver an email
from a different process than the test process. When that happens, turn on
shared mode. This will tell Bamboo.TestAdapter
to always send to the test process.
This means that you cannot use shared mode with async tests.
Try to use this version first
use Bamboo.Test
And if you are delivering from another process, set shared: true
use Bamboo.Test, shared: true
Common scenarios for delivering mail from a different process are when you send from inside of a Task, GenServer, or are running acceptance tests with a headless browser like phantomjs.