Action Mailerのテスト用テンプレート

action_mailer_gem.rb

# frozen_string_literal: true
# https://github.com/rails/rails/blob/main/guides/bug_report_templates/generic_gem.rb

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  # Activate the gem you are reporting the issue against.
  gem "actionmailer", "~> 7.0.0"
end

require "action_mailer"
require "minitest/autorun"
require "logger"

ActionMailer::Base.logger = Logger.new(STDOUT)

class UserMailer < ActionMailer::Base
  def welcome
    @name = params[:name]
    mail(from: "from@example.com", to: "to@example.com", subject: "subject") do |format|
      format.text { render plain: "Hello #{@name}!" }
    end
  end
end

class BugTest < ActionMailer::TestCase
  def test_deliver_now
    email = UserMailer.with(name: "Mikel").welcome
    assert_emails 1 do
      email.deliver_now
    end
    assert_equal ["from@example.com"], email.from
    assert_equal ["to@example.com"], email.to
    assert_equal "subject", email.subject
    assert_equal "Hello Mikel!", email.body.to_s
  end

  def test_deliver_later
    assert_enqueued_emails 2 do
      UserMailer.with(name: "Mikel").welcome.deliver_later(wait_until: 10.hours.from_now)
      UserMailer.with(name: "Mikel").welcome.deliver_later(wait: 1.hour)
    end
    assert_emails 0
    # https://github.com/rails/rails/pull/47520
    # deliver_enqueued_emails
  end
end