Module: ActionMailer::TestHelper
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Extension / Inclusion / Inheritance Descendants | |
Included In:
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Instance Chain:
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Defined in: | actionmailer/lib/action_mailer/test_helper.rb |
Overview
Provides helper methods for testing Action Mailer, including #assert_emails and #assert_no_emails.
Instance Attribute Summary
::ActiveJob::TestHelper
- Included
Instance Method Summary
-
#assert_emails(number, &block)
Asserts that the number of emails sent matches the given number.
-
#assert_enqueued_email_with(mailer, method, params: nil, args: nil, queue: nil, &block)
Asserts that a specific email has been enqueued, optionally matching arguments and/or params.
-
#assert_enqueued_emails(number, &block)
Asserts that the number of emails enqueued for later delivery matches the given number.
-
#assert_no_emails(&block)
Asserts that no emails have been sent.
-
#assert_no_enqueued_emails(&block)
Asserts that no emails are enqueued for later delivery.
-
#capture_emails(&block)
Returns any emails that are sent in the block.
-
#deliver_enqueued_emails(queue: nil, at: nil, &block)
Delivers all enqueued emails.
::ActiveJob::TestHelper
- Included
#assert_enqueued_jobs | Asserts that the number of enqueued jobs matches the given number. |
#assert_enqueued_with | Asserts that the job has been enqueued with the given arguments. |
#assert_no_enqueued_jobs | Asserts that no jobs have been enqueued. |
#assert_no_performed_jobs | Asserts that no jobs have been performed. |
#assert_performed_jobs | Asserts that the number of performed jobs matches the given number. |
#assert_performed_with | Asserts that the job has been performed with the given arguments. |
#perform_enqueued_jobs | Performs all enqueued jobs. |
#queue_adapter | Accesses the queue_adapter set by |
#queue_adapter_for_test | Returns a queue adapter instance to use with all Active Job test helpers. |
::ActiveSupport::Testing::Assertions
- Included
#assert_changes | Assertion that the result of evaluating an expression is changed before and after invoking the passed in block. |
#assert_difference | Test numeric difference between the return value of an expression as a result of what is evaluated in the yielded block. |
#assert_no_changes | Assertion that the result of evaluating an expression is not changed before and after invoking the passed in block. |
#assert_no_difference | Assertion that the numeric result of evaluating an expression is not changed before and after invoking the passed in block. |
#assert_not | Asserts that an expression is not truthy. |
#assert_nothing_raised | Assertion that the block should not raise an exception. |
#assert_raise | |
#assert_raises | Asserts that a block raises one of |
Instance Method Details
#assert_emails(number, &block)
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
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 35
def assert_emails(number, &block) if block_given? diff = capture_emails(&block).length assert_equal number, diff, "#{number} emails expected, but #{diff} were sent" else assert_equal number, ActionMailer::Base.deliveries.size end end
#assert_enqueued_email_with(mailer, method, params: nil, args: nil, queue: nil, &block)
Asserts that a specific email has been enqueued, optionally matching arguments and/or params.
def test_email
ContactMailer.welcome.deliver_later
assert_enqueued_email_with ContactMailer, :welcome
end
def test_email_with_parameters
ContactMailer.with(greeting: "Hello").welcome.deliver_later
assert_enqueued_email_with ContactMailer, :welcome, args: { greeting: "Hello" }
end
def test_email_with_arguments
ContactMailer.welcome("Hello", "Goodbye").deliver_later
assert_enqueued_email_with ContactMailer, :welcome, args: ["Hello", "Goodbye"]
end
def test_email_with_named_arguments
ContactMailer.welcome(greeting: "Hello", farewell: "Goodbye").deliver_later
assert_enqueued_email_with ContactMailer, :welcome, args: [{ greeting: "Hello", farewell: "Goodbye" }]
end
def test_email_with_parameters_and_arguments
ContactMailer.with(greeting: "Hello").welcome("Cheers", "Goodbye").deliver_later
assert_enqueued_email_with ContactMailer, :welcome, params: { greeting: "Hello" }, args: ["Cheers", "Goodbye"]
end
def test_email_with_parameters_and_named_arguments
ContactMailer.with(greeting: "Hello").welcome(farewell: "Goodbye").deliver_later
assert_enqueued_email_with ContactMailer, :welcome, params: { greeting: "Hello" }, args: [{farewell: "Goodbye"}]
end
def test_email_with_parameterized_mailer
ContactMailer.with(greeting: "Hello").welcome.deliver_later
assert_enqueued_email_with ContactMailer.with(greeting: "Hello"), :welcome
end
def test_email_with_matchers
ContactMailer.with(greeting: "Hello").welcome("Cheers", "Goodbye").deliver_later
assert_enqueued_email_with ContactMailer, :welcome,
params: ->(params) { /hello/i.match?(params[:greeting]) },
args: ->(args) { /cheers/i.match?(args[0]) }
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
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 157
def assert_enqueued_email_with(mailer, method, params: nil, args: nil, queue: nil, &block) if mailer.is_a? ActionMailer::Parameterized::Mailer params = mailer.instance_variable_get(:@params) mailer = mailer.instance_variable_get(:@mailer) end if args.is_a?(Hash) ActionMailer.deprecator.warn <<~MSG Passing a Hash to the assert_enqueued_email_with :args kwarg causes the Hash to be treated as params. This behavior is deprecated and will be removed in Rails 7.2. To specify a params Hash, use the :params kwarg: assert_enqueued_email_with MyMailer, :my_method, params: { my_param: "value" } Or, to specify named mailer args as a Hash, wrap the Hash in an array: assert_enqueued_email_with MyMailer, :my_method, args: [{ my_arg: "value" }] # OR assert_enqueued_email_with MyMailer, :my_method, args: [my_arg: "value"] MSG params, args = args, nil end args = Array(args) unless args.is_a?(Proc) queue ||= mailer.deliver_later_queue_name || ActiveJob::Base.default_queue_name expected = ->(job_args) do job_kwargs = job_args. [mailer.to_s, method.to_s, "deliver_now"] == job_args && params === job_kwargs[:params] && args === job_kwargs[:args] end assert_enqueued_with(job: mailer.delivery_job, args: expected, queue: queue.to_s, &block) end
#assert_enqueued_emails(number, &block)
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
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 91
def assert_enqueued_emails(number, &block) assert_enqueued_jobs(number, only: ->(job) { delivery_job_filter(job) }, &block) end
#assert_no_emails(&block)
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
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 63
def assert_no_emails(&block) assert_emails 0, &block end
#assert_no_enqueued_emails(&block)
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
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 211
def assert_no_enqueued_emails(&block) assert_enqueued_emails 0, &block end
#capture_emails(&block)
Returns any emails that are sent in the block.
def test_emails
emails = capture_emails do
ContactMailer.welcome.deliver_now
end
assert_equal "Hi there", emails.first.subject
emails = capture_emails do
ContactMailer.welcome.deliver_now
ContactMailer.welcome.deliver_later
end
assert_equal "Hi there", emails.first.subject
end
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 269
def capture_emails(&block) original_count = ActionMailer::Base.deliveries.size deliver_enqueued_emails(&block) new_count = ActionMailer::Base.deliveries.size diff = new_count - original_count ActionMailer::Base.deliveries.last(diff) end
#deliver_enqueued_emails(queue: nil, at: nil, &block)
Delivers all enqueued emails. If a block is given, delivers all of the emails that were enqueued throughout the duration of the block. If a block is not given, delivers all the enqueued emails up to this point in the test.
def test_deliver_enqueued_emails
deliver_enqueued_emails do
ContactMailer.welcome.deliver_later
end
assert_emails 1
end
def test_deliver_enqueued_emails_without_block
ContactMailer.welcome.deliver_later
deliver_enqueued_emails
assert_emails 1
end
If the :queue
option is specified, then only the emails(s) enqueued to a specific queue will be performed.
def test_deliver_enqueued_emails_with_queue
deliver_enqueued_emails queue: :external_mailers do
CustomerMailer.deliver_later_queue_name = :external_mailers
CustomerMailer.welcome.deliver_later # will be performed
EmployeeMailer.deliver_later_queue_name = :internal_mailers
EmployeeMailer.welcome.deliver_later # will not be performed
end
assert_emails 1
end
If the :at
option is specified, then only delivers emails enqueued to deliver immediately or before the given time.
# File 'actionmailer/lib/action_mailer/test_helper.rb', line 251
def deliver_enqueued_emails(queue: nil, at: nil, &block) perform_enqueued_jobs(only: ->(job) { delivery_job_filter(job) }, queue: queue, at: at, &block) end