diff --git a/.gitpod.yml b/.gitpod.yml
new file mode 100644
index 00000000..feefd42d
--- /dev/null
+++ b/.gitpod.yml
@@ -0,0 +1,21 @@
+# This configuration file was automatically generated by Gitpod.
+# Please adjust to your needs (see https://www.gitpod.io/docs/introduction/learn-gitpod/gitpod-yaml)
+# and commit this file to your remote git repository to share the goodness with others.
+
+# Learn more from ready-to-use templates: https://www.gitpod.io/docs/introduction/getting-started/quickstart
+
+tasks:
+  - init: |
+      (
+        set -e
+        bundle install
+        gem install optimizely-sdk
+        rake build
+        gem install pkg/optimizely-sdk-4.0.1.gem
+      )
+
+vscode:
+  extensions:
+    - rebornix.ruby@0.28.1
+    - castwide.solargraph@0.24.0
+    - wingrunr21.vscode-ruby@0.28.0
diff --git a/myapp.rb b/myapp.rb
new file mode 100644
index 00000000..53fe4bec
--- /dev/null
+++ b/myapp.rb
@@ -0,0 +1,165 @@
+# frozen_string_literal: true
+
+require 'optimizely'
+require 'optimizely/optimizely_user_context'
+require 'optimizely/optimizely_factory'
+require 'optimizely/helpers/sdk_settings'
+require 'optimizely/decide/optimizely_decide_option'
+require 'logger'
+
+# @param user_ctx [Optimizely::OptimizelyUserContext]
+def fetch_and_decide(user_ctx)
+  # =========================================
+  # Fetch Qualified Segments + decide
+  # =========================================
+
+  user_ctx.fetch_qualified_segments # to test segment options add one or both as argument: ['RESET_CACHE', 'IGNORE_CACHE']
+
+  options = [Optimizely::Decide::OptimizelyDecideOption::INCLUDE_REASONS]
+  decision = user_ctx.decide('flag1', options)
+  puts(' >>> DECISION ', decision.as_json)
+
+  segments = user_ctx.qualified_segments
+  puts('  >>> SEGMENTS: ', segments)
+
+  return unless segments
+
+  segments.each do |segment|
+    is_qualified = user.is_qualified_for(segment)
+    puts('  >>> IS QUALIFIED: ', is_qualified)
+  end
+end
+
+# @param optimizely_client [Optimizely::Project]
+def send_event(optimizely_client)
+  identifiers = {'fs-user-id': 'fs-id-12', 'email': 'fs-bash-x@optimizely.com'}
+
+  # valid case
+  optimizely_client.send_odp_event(type: 'any', identifiers: identifiers, action: 'any')
+
+  # # test missing/empty identifiers should not be allowed
+  optimizely_client.send_odp_event(action: 'any', identifiers: nil, type: 'any')
+  optimizely_client.send_odp_event(action: 'any', identifiers: {}, type: 'any')
+
+  # # test missing/empty action should not be allowed
+  optimizely_client.send_odp_event(action: '', identifiers: identifiers, type: 'any')
+  optimizely_client.send_odp_event(action: nil, identifiers: identifiers, type: 'any')
+end
+
+# ============================================
+# CONFIG TYPE 1:
+# default config, minimal settings
+# ============================================
+
+# TEST THE FOLLOWING:
+# - test creating user context with regular attributes
+# - test creating user context with prebuilt segments (no odp list), should get segments back, experiment should evaluate to true, decide response should look correct
+#     - truth table - TBD
+# - test creating user context  with prebuilt segment list, should get back a list of segments, experiment should evaluate to true, decide response should look correct
+#     - may not need truth table test here (check)
+# - add RESET_CACHE and/or IGNORE_CACHE to fetch qualified segments call and repeat
+# - test send event
+#     - verify events on ODP event inspector
+# - in send_event function uncomment lines of code that test missing identifiers and action keys, verify appropriate error is produced
+# - test audience segments (see spreadsheet
+# - test implicit/explicit ODP events?
+# - test integrations (no ODP integration added to project, integration is on, is off)
+
+def config_1
+  optimizely_client = Optimizely::OptimizelyFactory.custom_instance('TbrfRLeKvLyWGusqANoeR', nil, nil, Optimizely::SimpleLogger.new(Logger::DEBUG))
+
+  attributes = {"laptop_os": 'mac'}
+
+  # CASE 1 - REGULAR ATTRIBUTES, NO ODP
+  user = optimizely_client.create_user_context('user123', attributes)
+
+  # CASE 2 - PREBUILT SEGMENTS, NO LIST SEGMENTS, valid user id is fs-id-12 (matehces DOB)
+  # IMPORTANT: before running - make sure that in app.optimizely AB experiment you switched audience to "audience2-prebuit segment (no list)"
+  # user = optimizely_client.create_user_context('fs-id-12', attributes)
+
+  # CASE 3 - SEGMENT LIST/ARRAY, valid user id is fs-id-6
+  # IMPORTANT: before running - make sure that in app.optimizely AB experiment you switched audience to "audience3-prebuilt segment list"
+  # user = optimizely_client.create_user_context('fs-id-6', attributes)
+
+  fetch_and_decide(user)
+  send_event(optimizely_client)
+
+  optimizely_client.close
+end
+
+# ============================================
+# CONFIG TYPE 2:
+# with ODP integration changed at app.optimizely.com - changed public key or host url
+# VALID API key/HOST url- should work, INVALID KEY/URL-should get errors
+# ============================================
+
+# TEST THE FOLLOWING:
+# - test the same as in "CONFIG TYPE 1" but use invalid API key or HOST url
+# - TODO clarify with Jae what to test here !!!
+
+def config_2
+  optimizely_client = Optimizely::OptimizelyFactory.custom_instance('TbrfRLeKvLyWGusqANoeR', nil, nil, Optimizely::SimpleLogger.new(Logger::DEBUG))
+
+  attributes = {"laptop_os": 'mac'}
+
+  # CASE 1 - REGULAR ATTRIBUTES, NO ODP
+  user = optimizely_client.create_user_context('user123', attributes)
+
+  # CASE 2 - PREBUILT SEGMENTS, NO LIST SEGMENTS, valid user id is fs-id-12 (matehces DOB)
+  # user = optimizely_client.create_user_context('fs-id-12', attributes)
+
+  # CASE 3 - SEGMENT LIST/ARRAY, valid user id is fs-id-6
+  # user = optimizely_client.create_user_context('fs-id-6', attributes)
+
+  fetch_and_decide(user)
+  send_event(optimizely_client)
+
+  optimizely_client.close
+end
+
+# ============================================
+# CONFIG TYPE 3:
+# with different ODP configuration options (odpdisabled, segments_cache_size etc)
+# ============================================
+
+# TEST THE FOLLOWING:
+# same as in "CONFIG TYPE 1", but add config options to fetch qualified segments function, for example:
+# - disable_odp
+# - segments_cache_size
+# - segments_cache_timeout_in_secs
+# - odp_segments_cache
+# - odp_segment_manager
+# - odp_event_manager
+# - odp_segment_request_timeout
+# - odp_event_request_timeout
+# - odp_event_flush_interval
+
+# Observe responses and verity the correct behavior.
+
+def config_3
+  settings = Optimizely::Helpers::OptimizelySdkSettings.new(disable_odp: true, odp_event_request_timeout: 0)
+
+  optimizely_client = Optimizely::OptimizelyFactory.custom_instance(
+    'TbrfRLeKvLyWGusqANoeR', nil, nil, Optimizely::SimpleLogger.new(Logger::DEBUG), nil, false, nil, nil, nil, settings
+  )
+
+  attributes = {"laptop_os": 'mac'}
+
+  # CASE 1 - REGULAR ATTRIBUTES, NO ODP
+  user = optimizely_client.create_user_context('user123', attributes)
+
+  # CASE 2 - PREBUILT SEGMENTS, NO LIST SEGMENTS, valid user id is fs-id-12 (matehces DOB)
+  # user = optimizely_client.create_user_context('fs-id-12', attributes)
+
+  # CASE 3 - SEGMENT LIST/ARRAY, valid user id is fs-id-6
+  # user = optimizely_client.create_user_context('fs-id-6', attributes)
+
+  fetch_and_decide(user)
+  send_event(optimizely_client)
+
+  optimizely_client.close
+end
+
+config_1
+config_2
+config_3