assert_enqueued_email_with

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