[TE-3868] WIP - Add cucumber test example with prototype integration with Ruby Collector

cucumber/Gemfile

@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'cucumber'
+gem 'rspec'
+gem 'buildkite-test_collector', git: 'https://github.com/buildkite/test-collector-ruby.git', ref: '863e7fcc5a25457a06a09d223a7f9ae353ce9254'

cucumber/Gemfile.lock

@@ -0,0 +1,87 @@
+GIT
+  remote: https://github.com/buildkite/test-collector-ruby.git
+  revision: 863e7fcc5a25457a06a09d223a7f9ae353ce9254
+  ref: 863e7fcc5a25457a06a09d223a7f9ae353ce9254
+  specs:
+    buildkite-test_collector (2.9.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    bigdecimal (3.1.9)
+    builder (3.3.0)
+    cucumber (9.2.1)
+      builder (~> 3.2)
+      cucumber-ci-environment (> 9, < 11)
+      cucumber-core (> 13, < 14)
+      cucumber-cucumber-expressions (~> 17.0)
+      cucumber-gherkin (> 24, < 28)
+      cucumber-html-formatter (> 20.3, < 22)
+      cucumber-messages (> 19, < 25)
+      diff-lcs (~> 1.5)
+      mini_mime (~> 1.1)
+      multi_test (~> 1.1)
+      sys-uname (~> 1.2)
+    cucumber-ci-environment (10.0.1)
+    cucumber-core (13.0.3)
+      cucumber-gherkin (>= 27, < 28)
+      cucumber-messages (>= 20, < 23)
+      cucumber-tag-expressions (> 5, < 7)
+    cucumber-cucumber-expressions (17.1.0)
+      bigdecimal
+    cucumber-gherkin (27.0.0)
+      cucumber-messages (>= 19.1.4, < 23)
+    cucumber-html-formatter (21.9.0)
+      cucumber-messages (> 19, < 28)
+    cucumber-messages (22.0.0)
+    cucumber-tag-expressions (6.1.2)
+    diff-lcs (1.6.2)
+    ffi (1.17.2)
+    ffi (1.17.2-aarch64-linux-gnu)
+    ffi (1.17.2-aarch64-linux-musl)
+    ffi (1.17.2-arm-linux-gnu)
+    ffi (1.17.2-arm-linux-musl)
+    ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86-linux-gnu)
+    ffi (1.17.2-x86-linux-musl)
+    ffi (1.17.2-x86_64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
+    ffi (1.17.2-x86_64-linux-musl)
+    mini_mime (1.1.5)
+    multi_test (1.1.0)
+    rspec (3.13.1)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.4)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.4)
+    sys-uname (1.3.1)
+      ffi (~> 1.1)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  ruby
+  x86-linux-gnu
+  x86-linux-musl
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  buildkite-test_collector!
+  cucumber
+  rspec
+
+BUNDLED WITH
+   2.6.8

cucumber/features/sample.feature

@@ -0,0 +1,7 @@
+# Sample Feature
+Feature: Sample feature to demonstrate Cucumber
+
+  Scenario: Simple addition
+    Given I have two numbers 2 and 3
+    When I add them
+    Then the result should be 5

cucumber/step_definitions/sample_steps.rb

@@ -0,0 +1,12 @@
+Given('I have two numbers {int} and {int}') do |int, int2|
+  @number1 = int
+  @number2 = int2
+end
+
+When('I add them') do
+  @result = @number1 + @number2
+end
+
+Then('the result should be {int}') do |int|
+  expect(@result).to eq(int)
+end