add hooks parameter to vernier

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 ## master (unreleased)
 
+- Vernier: Add hooks configuration parameter. ([@lHydra][])
+
+Now you can add more insights to the resulting report by adding event markers from Active Support Notifications.
+To do this, specify the `TEST_VERNIER_HOOKS=rails` env var or set it through `Vernier` configuration:
+
+```ruby
+TestProf::Vernier.configure do |config|
+  config.hooks = :rails
+end
+```
+
 ## 1.3.3 (2024-04-19)
 
 - Fix MemProf bugs. ([@palkan][])
@@ -390,3 +401,4 @@ See [changelog](https://github.com/test-prof/test-prof/blob/v0.8.0/CHANGELOG.md)
 [@Vankiru]: https://github.com/Vankiru
 [@uzushino]: https://github.com/uzushino
 [@lioneldebauge]: https://github.com/lioneldebauge
+[@lHydra]: https://github.com/lHydra

docs/profilers/ruby_profilers.md

@@ -143,6 +143,25 @@ You can also profile your application boot process:
 TEST_VERNIER=boot bundle exec rspec ./spec/some_spec.rb
 ```
 
+### Add markers from  Active Support Notifications
+
+You can add more insights to the resulting report by adding event markers from Active Support Notifications:
+
+```sh
+TEST_VERNIER=1 TEST_VERNIER_HOOKS=rails bundle exec rake test
+
+# or for RSpec
+TEST_VERNIER=1 TEST_VERNIER_HOOKS=rails bundle exec rspec ...
+```
+
+Or you can set the hooks parameter through the `Vernier` configuration:
+
+```ruby
+TestProf::Vernier.configure do |config|
+  config.hooks = :rails
+end
+```
+
 ## RubyProf
 
 Easily integrate the power of [ruby-prof](https://github.com/ruby-prof/ruby-prof) into your test suite.

lib/test_prof/vernier.rb

@@ -19,14 +19,15 @@ module TestProf
   module Vernier
     # Vernier configuration
     class Configuration
-      attr_accessor :mode, :target, :interval
+      attr_accessor :mode, :target, :interval, :hooks
 
       def initialize
         @mode = ENV.fetch("TEST_VERNIER_MODE", :wall).to_sym
         @target = (ENV["TEST_VERNIER"] == "boot") ? :boot : :suite
 
         sample_interval = ENV["TEST_VERNIER_INTERVAL"].to_i
         @interval = (sample_interval > 0) ? sample_interval : nil
+        @hooks = (ENV["TEST_VERNIER_HOOKS"] == "rails") ? :rails : nil
       end
 
       def boot?
@@ -82,6 +83,7 @@ def profile(name = nil)
         options = {}
 
         options[:interval] = config.interval if config.interval
+        options[:hooks] = config.hooks if config.hooks
 
         if block_given?
           options[:mode] = config.mode