Add .enabled configuration (#10)

Author: codergeek121

Diff for: README.md

@@ -10,7 +10,7 @@
 Add the gem:
 
 ```bash
-bundle add email_error_reporter && bundle install
+bundle add email_error_reporter
 ```
 
 and configure the email addresses that should receive an email in the case of an exception:
@@ -37,6 +37,14 @@ Set a custom from address.
 config.email_error_reporter.from = "[email protected]"
 ```
 
+Disables the email reports for specific environments. Mails are enabled by default on all envs.
+
+```ruby
+# e.g. in development.rb
+# default: true
+config.email_error_reporter.enabled = false
+```
+
 ## Test your setup
 
 You can use the built-in rake task `rake email_error_reporter:check` to check if everything works correctly in your setup.

Diff for: lib/email_error_reporter/engine.rb

@@ -5,9 +5,12 @@ class Engine < ::Rails::Engine
     config.email_error_reporter = ActiveSupport::OrderedOptions.new
     config.email_error_reporter.to = []
     config.email_error_reporter.from = "[email protected]"
+    config.email_error_reporter.enabled = true
 
-    initializer "email_error_reporter.error_subscribe" do
-      Rails.error.subscribe(Subscriber.new)
+    initializer "email_error_reporter.error_subscribe" do |app|
+      if app.config.email_error_reporter.enabled
+        Rails.error.subscribe(Subscriber.new)
+      end
     end
 
     # ActiveJob cannot (de)-serialize exceptions by default

Diff for: test/subscriber_test.rb

@@ -26,6 +26,31 @@ class SubscriberTest < ActiveSupport::TestCase
     )
   end
 
+  test "enqueues no mail if disabled" do
+    old_config = Rails.application.config.email_error_reporter.enabled
+    Rails.application.config.email_error_reporter.enabled = false
+    Rails.error.record(TestError) do
+      raise TestError
+    end
+
+  rescue TestError => e
+    # matcher
+    assert_enqueued_with(
+      job: ActionMailer::MailDeliveryJob,
+      args: ->(j) {
+        [
+          "EmailErrorReporter::ErrorMailer" == j[0],
+          "error" == j[1],
+          "deliver_now" == j[2],
+          e.class == j[3][:args][0].class,
+          { handled: false, context: {}, severity: :error, source: rails_default_source } == j[3][:args][1],
+        ].all?
+      }
+    )
+  ensure
+    Rails.application.config.email_error_reporter.enabled = old_config
+  end
+
   private
 
   def rails_default_source