Add more specs

Gemfile

@@ -7,5 +7,6 @@ gemspec
 
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
+gem 'sqlite3', '~> 1.4'
 gem "pry"
 gem 'pg'

spec/bemi/change_query_helpers_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+RSpec.describe Bemi::ChangeQueryHelpers do
+  after { BemiChange.delete_all }
+
+  describe '#diff' do
+    it 'returns the diff between before and after' do
+      change = BemiChange.new(before: { name: 'Alice' }, after: { name: 'Bob' })
+      expect(change.diff).to eq({ 'name' => ['Alice', 'Bob'] })
+    end
+  end
+
+  describe '.created' do
+    it 'returns changes with CREATE operation' do
+      change = BemiChange.create!(operation: 'CREATE')
+      expect(BemiChange.created).to include(change)
+    end
+  end
+
+  describe '.asc' do
+    it 'returns changes in ascending order' do
+      change1 = BemiChange.create!(committed_at: Time.current)
+      change2 = BemiChange.create!(committed_at: 1.day.ago)
+      expect(BemiChange.asc).to eq([change2, change1])
+    end
+  end
+end

spec/bemi/record_query_helpers_spec.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+RSpec.describe Bemi::RecordQueryHelpers do
+  after { BemiChange.delete_all }
+
+  describe '#bemi_changes' do
+    it 'returns the changes for the record' do
+      todo = Todo.create!(task: 'Buy milk', completed: false)
+      change = BemiChange.create!(
+        table: 'todos',
+        primary_key: todo.id,
+        committed_at: Time.current,
+        operation: 'CREATE',
+        before: {},
+        after: { task: 'Buy milk', completed: true },
+        context: { user_id: 1 },
+      )
+
+      expect(todo.bemi_changes).to eq([change])
+    end
+  end
+end

spec/fixtures/models.rb

@@ -0,0 +1,29 @@
+require 'sqlite3'
+
+ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ':memory:')
+ActiveRecord::Schema.define do
+  create_table :todos, force: true do |t|
+    t.string :task
+    t.boolean :completed
+  end
+
+  create_table :changes, force: true do |t|
+    t.string :table
+    t.string :primary_key
+    t.datetime :committed_at
+    t.string :operation
+    t.json :before
+    t.json :after
+    t.json :context
+  end
+end
+
+class BemiChange < ActiveRecord::Base
+  include Bemi::ChangeQueryHelpers
+  self.table_name = 'changes'
+end
+
+class Todo < ActiveRecord::Base
+  include Bemi::RecordQueryHelpers
+  bemi_change_class 'BemiChange'
+end

spec/spec_helper.rb

@@ -3,6 +3,8 @@
 require "bemi-rails"
 require "active_record/connection_adapters/postgresql_adapter"
 
+require_relative "fixtures/models"
+
 RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure
   config.example_status_persistence_file_path = ".rspec_status"