Add comprehensive Minitest test suite with in-memory DB setup

Co-authored-by: jaracursorsh <jaracursorsh@mitomail.com>

Author: cursoragent

.gitignore

@@ -7,4 +7,5 @@
 /spec/reports/
 /tmp/
 /dist
-*.gem
+*.gem
+/vendor/

CHANGELOG.md

@@ -21,4 +21,7 @@
 
 ## [0.1.0] - 2024-08-29
 
-- Initial test release (not production ready)
+- Initial test release (not production ready)
+
+## Unreleased
+- Add comprehensive Minitest test suite, in-memory DB setup, coverage, and CI-ready test task.

Gemfile

@@ -6,3 +6,14 @@ source "https://rubygems.org"
 gemspec
 
 gem "rake", "~> 13.0"
+
+group :development, :test do
+  gem "minitest", "~> 5.22"
+  gem "minitest-reporters", "~> 1.6"
+  gem "rails", ">= 7.1", "< 9.0"
+  gem "sqlite3", ">= 2.1"
+  gem "database_cleaner-active_record", "~> 2.0"
+  gem "webmock", "~> 3.23"
+  gem "timecop", "~> 0.9"
+  gem "simplecov", "~> 0.22", require: false
+end

Gemfile.lock

@@ -0,0 +1,270 @@
+PATH
+  remote: .
+  specs:
+    profitable (0.2.3)
+      activesupport (>= 5.2)
+      pay (>= 7.0.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (8.0.2)
+      actionpack (= 8.0.2)
+      activesupport (= 8.0.2)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (8.0.2)
+      actionpack (= 8.0.2)
+      activejob (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
+      mail (>= 2.8.0)
+    actionmailer (8.0.2)
+      actionpack (= 8.0.2)
+      actionview (= 8.0.2)
+      activejob (= 8.0.2)
+      activesupport (= 8.0.2)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (8.0.2)
+      actionview (= 8.0.2)
+      activesupport (= 8.0.2)
+      nokogiri (>= 1.8.5)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (8.0.2)
+      actionpack (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (8.0.2)
+      activesupport (= 8.0.2)
+      builder (~> 3.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (8.0.2)
+      activesupport (= 8.0.2)
+      globalid (>= 0.3.6)
+    activemodel (8.0.2)
+      activesupport (= 8.0.2)
+    activerecord (8.0.2)
+      activemodel (= 8.0.2)
+      activesupport (= 8.0.2)
+      timeout (>= 0.4.0)
+    activestorage (8.0.2)
+      actionpack (= 8.0.2)
+      activejob (= 8.0.2)
+      activerecord (= 8.0.2)
+      activesupport (= 8.0.2)
+      marcel (~> 1.0)
+    activesupport (8.0.2)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    ansi (1.5.0)
+    base64 (0.3.0)
+    benchmark (0.4.1)
+    bigdecimal (3.2.2)
+    builder (3.3.0)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.3)
+    crack (1.0.0)
+      bigdecimal
+      rexml
+    crass (1.0.6)
+    database_cleaner-active_record (2.2.2)
+      activerecord (>= 5.a)
+      database_cleaner-core (~> 2.0)
+    database_cleaner-core (2.0.1)
+    date (3.4.1)
+    docile (1.4.1)
+    drb (2.2.3)
+    erb (5.0.2)
+    erubi (1.13.1)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
+    hashdiff (1.2.0)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.1)
+    irb (1.15.2)
+      pp (>= 0.6.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    logger (1.7.0)
+    loofah (2.24.1)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.4)
+    mini_mime (1.1.5)
+    minitest (5.25.5)
+    minitest-reporters (1.7.1)
+      ansi
+      builder
+      minitest (>= 5.0)
+      ruby-progressbar
+    net-imap (0.5.9)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.4)
+    nokogiri (1.18.9-aarch64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.9-aarch64-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.9-arm-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.9-arm-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.18.9-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.9-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.18.9-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.18.9-x86_64-linux-musl)
+      racc (~> 1.4)
+    pay (11.2.1)
+      rails (>= 7.0.0)
+    pp (0.6.2)
+      prettyprint
+    prettyprint (0.2.0)
+    psych (5.2.6)
+      date
+      stringio
+    public_suffix (6.0.2)
+    racc (1.8.1)
+    rack (3.2.0)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.2.1)
+      rack (>= 3)
+    rails (8.0.2)
+      actioncable (= 8.0.2)
+      actionmailbox (= 8.0.2)
+      actionmailer (= 8.0.2)
+      actionpack (= 8.0.2)
+      actiontext (= 8.0.2)
+      actionview (= 8.0.2)
+      activejob (= 8.0.2)
+      activemodel (= 8.0.2)
+      activerecord (= 8.0.2)
+      activestorage (= 8.0.2)
+      activesupport (= 8.0.2)
+      bundler (>= 1.15.0)
+      railties (= 8.0.2)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.2)
+      loofah (~> 2.21)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (8.0.2)
+      actionpack (= 8.0.2)
+      activesupport (= 8.0.2)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      zeitwerk (~> 2.6)
+    rake (13.3.0)
+    rdoc (6.14.2)
+      erb
+      psych (>= 4.0.0)
+    reline (0.6.2)
+      io-console (~> 0.5)
+    rexml (3.4.1)
+    ruby-progressbar (1.13.0)
+    securerandom (0.4.1)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.13.2)
+    simplecov_json_formatter (0.1.4)
+    sqlite3 (2.7.3-aarch64-linux-gnu)
+    sqlite3 (2.7.3-aarch64-linux-musl)
+    sqlite3 (2.7.3-arm-linux-gnu)
+    sqlite3 (2.7.3-arm-linux-musl)
+    sqlite3 (2.7.3-arm64-darwin)
+    sqlite3 (2.7.3-x86_64-darwin)
+    sqlite3 (2.7.3-x86_64-linux-gnu)
+    sqlite3 (2.7.3-x86_64-linux-musl)
+    stringio (3.1.7)
+    thor (1.4.0)
+    timecop (0.9.10)
+    timeout (0.4.3)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    uri (1.0.3)
+    useragent (0.16.11)
+    webmock (3.25.1)
+      addressable (>= 2.8.0)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.3)
+
+PLATFORMS
+  aarch64-linux
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux
+  x86_64-linux-musl
+
+DEPENDENCIES
+  database_cleaner-active_record (~> 2.0)
+  minitest (~> 5.22)
+  minitest-reporters (~> 1.6)
+  profitable!
+  rails (>= 7.1, < 9.0)
+  rake (~> 13.0)
+  simplecov (~> 0.22)
+  sqlite3 (>= 2.1)
+  timecop (~> 0.9)
+  webmock (~> 3.23)
+
+BUNDLED WITH
+   2.7.1

Rakefile

@@ -1,4 +1,12 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
-task default: %i[]
+require "rake/testtask"
+
+Rake::TestTask.new(:test) do |t|
+  t.libs << "test"
+  t.pattern = "test/**/*_test.rb"
+  t.warning = true
+end
+
+task default: :test

test/profitable/engine_test.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+require "test_helper"
+
+class EngineIntegrationTest < Minitest::Test
+  include Rails.application.routes.url_helpers
+
+  def setup
+    super
+    # Define routes for the engine in the test app
+    TestApp.routes.draw do
+      mount Profitable::Engine => "/profitable"
+    end
+  end
+
+  def test_dashboard_renders
+    # seed some data so view calls do not blow up
+    customer = Pay::Customer.create!(processor: "stripe")
+    Pay::Subscription.create!(
+      customer: customer,
+      processor: "stripe",
+      status: "active",
+      current_period_start: Time.now - 1.day,
+      current_period_end: Time.now + 1.day,
+      data: { "subscription_items" => [{ "price" => { "unit_amount" => 1000, "recurring" => { "interval" => "month", "interval_count" => 1 } } }] }
+    )
+
+    app = Rack::Builder.new do
+      map "/profitable" do
+        run Profitable::Engine
+      end
+    end.to_app
+
+    env = Rack::MockRequest.env_for("/profitable")
+    status, _headers, body_enum = app.call(env)
+    body = String.new
+    body_enum.each { |chunk| body << chunk }
+    assert_equal 200, status
+    assert_includes body, "total customers"
+    assert_includes body, "MRR"
+    assert_includes body, "Valuation at 3x ARR"
+  end
+end