6 files changed, 250 insertions, 0 deletions
diff --git a/actionmailer/test/mailers/asset_mailer.rb b/actionmailer/test/mailers/asset_mailer.rb
new file mode 100644
index 0000000000..7a9aba2629
--- /dev/null
+++ b/actionmailer/test/mailers/asset_mailer.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AssetMailer < ActionMailer::Base
+  self.mailer_name = "asset_mailer"
+
+  def welcome
+    mail
+  end
+end
diff --git a/actionmailer/test/mailers/base_mailer.rb b/actionmailer/test/mailers/base_mailer.rb
new file mode 100644
index 0000000000..c1bb48cc96
--- /dev/null
+++ b/actionmailer/test/mailers/base_mailer.rb
@@ -0,0 +1,150 @@
+# frozen_string_literal: true
+
+class BaseMailer < ActionMailer::Base
+  self.mailer_name = "base_mailer"
+
+  default to: "system@test.lindsaar.net",
+          from: "jose@test.plataformatec.com",
+          reply_to: "mikel@test.lindsaar.net"
+
+  def welcome(hash = {})
+    headers["X-SPAM"] = "Not SPAM"
+    mail({ subject: "The first email on new API!" }.merge!(hash))
+  end
+
+  def welcome_with_headers(hash = {})
+    headers hash
+    mail
+  end
+
+  def welcome_from_another_path(path)
+    mail(template_name: "welcome", template_path: path)
+  end
+
+  def welcome_without_deliveries
+    mail(template_name: "welcome")
+    mail.perform_deliveries = false
+  end
+
+  def html_only(hash = {})
+    mail(hash)
+  end
+
+  def plain_text_only(hash = {})
+    mail(hash)
+  end
+
+  def inline_attachment
+    attachments.inline["logo.png"] = "\312\213\254\232"
+    mail
+  end
+
+  def attachment_with_content(hash = {})
+    attachments["invoice.pdf"] = "This is test File content"
+    mail(hash)
+  end
+
+  def attachment_with_hash
+    attachments["invoice.jpg"] = { data: ::Base64.encode64("\312\213\254\232)b"),
+                                   mime_type: "image/x-jpg",
+                                   transfer_encoding: "base64" }
+    mail
+  end
+
+  def attachment_with_hash_default_encoding
+    attachments["invoice.jpg"] = { data: "\312\213\254\232)b",
+                                   mime_type: "image/x-jpg" }
+    mail
+  end
+
+  def implicit_multipart(hash = {})
+    attachments["invoice.pdf"] = "This is test File content" if hash.delete(:attachments)
+    mail(hash)
+  end
+
+  def implicit_with_locale(hash = {})
+    mail(hash)
+  end
+
+  def explicit_multipart(hash = {})
+    attachments["invoice.pdf"] = "This is test File content" if hash.delete(:attachments)
+    mail(hash) do |format|
+      format.text { render plain: "TEXT Explicit Multipart" }
+      format.html { render plain: "HTML Explicit Multipart" }
+    end
+  end
+
+  def explicit_multipart_templates(hash = {})
+    mail(hash) do |format|
+      format.html
+      format.text
+    end
+  end
+
+  def explicit_multipart_with_any(hash = {})
+    mail(hash) do |format|
+      format.any(:text, :html) { render plain: "Format with any!" }
+    end
+  end
+
+  def explicit_without_specifying_format_with_any(hash = {})
+    mail(hash) do |format|
+      format.any
+    end
+  end
+
+  def explicit_multipart_with_options(include_html = false)
+    mail do |format|
+      format.text(content_transfer_encoding: "base64") { render "welcome" }
+      format.html { render "welcome" } if include_html
+    end
+  end
+
+  def explicit_multipart_with_one_template(hash = {})
+    mail(hash) do |format|
+      format.html
+      format.text
+    end
+  end
+
+  def implicit_different_template(template_name = "")
+    mail(template_name: template_name)
+  end
+
+  def implicit_different_template_with_block(template_name = "")
+    mail(template_name: template_name) do |format|
+      format.text
+      format.html
+    end
+  end
+
+  def explicit_different_template(template_name = "")
+    mail do |format|
+      format.text { render template: "#{mailer_name}/#{template_name}" }
+      format.html { render template: "#{mailer_name}/#{template_name}" }
+    end
+  end
+
+  def different_layout(layout_name = "")
+    mail do |format|
+      format.text { render layout: layout_name }
+      format.html { render layout: layout_name }
+    end
+  end
+
+  def email_with_translations
+    mail body: render("email_with_translations", formats: [:html])
+  end
+
+  def without_mail_call
+  end
+
+  def with_nil_as_return_value
+    mail(template_name: "welcome")
+    nil
+  end
+
+  def with_subject_interpolations
+    mail(subject: default_i18n_subject(rapper_or_impersonator: "Slim Shady"), body: "")
+  end
+end
diff --git a/actionmailer/test/mailers/caching_mailer.rb b/actionmailer/test/mailers/caching_mailer.rb
new file mode 100644
index 0000000000..02f0c6c103
--- /dev/null
+++ b/actionmailer/test/mailers/caching_mailer.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class CachingMailer < ActionMailer::Base
+  self.mailer_name = "caching_mailer"
+
+  def fragment_cache
+    mail(subject: "welcome", template_name: "fragment_cache")
+  end
+
+  def fragment_cache_in_partials
+    mail(subject: "welcome", template_name: "fragment_cache_in_partials")
+  end
+
+  def skip_fragment_cache_digesting
+    mail(subject: "welcome", template_name: "skip_fragment_cache_digesting")
+  end
+
+  def fragment_caching_options
+    mail(subject: "welcome", template_name: "fragment_caching_options")
+  end
+
+  def multipart_cache
+    mail(subject: "welcome", template_name: "multipart_cache")
+  end
+end
diff --git a/actionmailer/test/mailers/delayed_mailer.rb b/actionmailer/test/mailers/delayed_mailer.rb
new file mode 100644
index 0000000000..b0f5ecc2fb
--- /dev/null
+++ b/actionmailer/test/mailers/delayed_mailer.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require "active_job/arguments"
+
+class DelayedMailerError < StandardError; end
+
+class DelayedMailer < ActionMailer::Base
+  cattr_accessor :last_error
+  cattr_accessor :last_rescue_from_instance
+
+  rescue_from DelayedMailerError do |error|
+    @@last_error = error
+    @@last_rescue_from_instance = self
+  end
+
+  rescue_from ActiveJob::DeserializationError do |error|
+    @@last_error = error
+    @@last_rescue_from_instance = self
+  end
+
+  def test_message(*)
+    mail(from: "test-sender@test.com", to: "test-receiver@test.com", subject: "Test Subject", body: "Test Body")
+  end
+
+  def test_raise(klass_name)
+    raise klass_name.constantize, "boom"
+  end
+end
diff --git a/actionmailer/test/mailers/params_mailer.rb b/actionmailer/test/mailers/params_mailer.rb
new file mode 100644
index 0000000000..84aa336311
--- /dev/null
+++ b/actionmailer/test/mailers/params_mailer.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class ParamsMailer < ActionMailer::Base
+  before_action { @inviter, @invitee = params[:inviter], params[:invitee] }
+
+  default to: Proc.new { @invitee }, from: -> { @inviter }
+
+  def invitation
+    mail(subject: "Welcome to the project!") do |format|
+      format.text { render plain: "So says #{@inviter}" }
+    end
+  end
+end
diff --git a/actionmailer/test/mailers/proc_mailer.rb b/actionmailer/test/mailers/proc_mailer.rb
new file mode 100644
index 0000000000..76e730bb79
--- /dev/null
+++ b/actionmailer/test/mailers/proc_mailer.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class ProcMailer < ActionMailer::Base
+  default to: "system@test.lindsaar.net",
+          "X-Proc-Method" => Proc.new { Time.now.to_i.to_s },
+          subject: Proc.new { give_a_greeting },
+          "x-has-to-proc" => :symbol,
+          "X-Lambda-Arity-0" => ->() { "0" },
+          "X-Lambda-Arity-1-arg" => ->(arg) { arg.computed_value },
+          "X-Lambda-Arity-1-self" => ->(_) { self.computed_value }
+
+  def welcome
+    mail
+  end
+
+  def computed_value
+    "complex_value"
+  end
+
+  private
+
+    def give_a_greeting
+      "Thanks for signing up this afternoon"
+    end
+end