/
test_helper.rb
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/
test_helper.rb
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# frozen_string_literal: true
require "active_job"
module ActionMailer
# Provides helper methods for testing Action Mailer, including #assert_emails
# and #assert_no_emails.
module TestHelper
include ActiveJob::TestHelper
# Asserts that the number of emails sent matches the given number.
#
# def test_emails
# assert_emails 0
# ContactMailer.welcome.deliver_now
# assert_emails 1
# ContactMailer.welcome.deliver_now
# assert_emails 2
# end
#
# If a block is passed, that block should cause the specified number of
# emails to be sent.
#
# def test_emails_again
# assert_emails 1 do
# ContactMailer.welcome.deliver_now
# end
#
# assert_emails 2 do
# ContactMailer.welcome.deliver_now
# ContactMailer.welcome.deliver_later
# end
# end
def assert_emails(number, &block)
if block_given?
original_count = ActionMailer::Base.deliveries.size
perform_enqueued_jobs(only: ->(job) { delivery_job_filter(job) }, &block)
new_count = ActionMailer::Base.deliveries.size
assert_equal number, new_count - original_count, "#{number} emails expected, but #{new_count - original_count} were sent"
else
assert_equal number, ActionMailer::Base.deliveries.size
end
end
# Asserts that no emails have been sent.
#
# def test_emails
# assert_no_emails
# ContactMailer.welcome.deliver_now
# assert_emails 1
# end
#
# If a block is passed, that block should not cause any emails to be sent.
#
# def test_emails_again
# assert_no_emails do
# # No emails should be sent from this block
# end
# end
#
# Note: This assertion is simply a shortcut for:
#
# assert_emails 0, &block
def assert_no_emails(&block)
assert_emails 0, &block
end
# Asserts that the number of emails enqueued for later delivery matches
# the given number.
#
# def test_emails
# assert_enqueued_emails 0
# ContactMailer.welcome.deliver_later
# assert_enqueued_emails 1
# ContactMailer.welcome.deliver_later
# assert_enqueued_emails 2
# end
#
# If a block is passed, that block should cause the specified number of
# emails to be enqueued.
#
# def test_emails_again
# assert_enqueued_emails 1 do
# ContactMailer.welcome.deliver_later
# end
#
# assert_enqueued_emails 2 do
# ContactMailer.welcome.deliver_later
# ContactMailer.welcome.deliver_later
# end
# end
def assert_enqueued_emails(number, &block)
assert_enqueued_jobs(number, only: ->(job) { delivery_job_filter(job) }, &block)
end
# Asserts that a specific email has been enqueued, optionally
# matching arguments.
#
# def test_email
# ContactMailer.welcome.deliver_later
# assert_enqueued_email_with ContactMailer, :welcome
# end
#
# def test_email_with_arguments
# ContactMailer.welcome("Hello", "Goodbye").deliver_later
# assert_enqueued_email_with ContactMailer, :welcome, args: ["Hello", "Goodbye"]
# end
#
# If a block is passed, that block should cause the specified email
# to be enqueued.
#
# def test_email_in_block
# assert_enqueued_email_with ContactMailer, :welcome do
# ContactMailer.welcome.deliver_later
# end
# end
#
# If +args+ is provided as a Hash, a parameterized email is matched.
#
# def test_parameterized_email
# assert_enqueued_email_with ContactMailer, :welcome,
# args: {email: 'user@example.com'} do
# ContactMailer.with(email: 'user@example.com').welcome.deliver_later
# end
# end
def assert_enqueued_email_with(mailer, method, args: nil, queue: "mailers", &block)
args = if args.is_a?(Hash)
[mailer.to_s, method.to_s, "deliver_now", params: args, args: []]
else
[mailer.to_s, method.to_s, "deliver_now", args: Array(args)]
end
assert_enqueued_with(job: mailer.delivery_job, args: args, queue: queue, &block)
end
# Asserts that no emails are enqueued for later delivery.
#
# def test_no_emails
# assert_no_enqueued_emails
# ContactMailer.welcome.deliver_later
# assert_enqueued_emails 1
# end
#
# If a block is provided, it should not cause any emails to be enqueued.
#
# def test_no_emails
# assert_no_enqueued_emails do
# # No emails should be enqueued from this block
# end
# end
def assert_no_enqueued_emails(&block)
assert_enqueued_emails 0, &block
end
private
def delivery_job_filter(job)
job_class = job.is_a?(Hash) ? job.fetch(:job) : job.class
Base.descendants.map(&:delivery_job).include?(job_class)
end
end
end