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Testing Wotsit Model Versioning Implementation in PaperTrail

This test suite validates the versioning functionality of the Wotsit model in PaperTrail, focusing on timestamp recording and update operations. The tests ensure proper version history tracking and error handling during model updates.

Test Coverage Overview

The test suite covers essential versioning behaviors for the Wotsit model.

Key areas tested include:

Timestamp preservation in version history
Safe update operations
Version reification accuracy
Error handling during updates

Implementation Analysis

The testing approach utilizes RSpec’s describe and it blocks to structure versioning tests. The implementation leverages PaperTrail’s versioning capabilities with specific focus on the reify mechanism for historical records.

Technical patterns include:

Version object manipulation
Timestamp verification
Exception handling validation

Technical Details

Testing tools and configuration:

RSpec as the testing framework
PaperTrail versioning enabled via versioning: true flag
described_class pattern for test subject reference
Expectation matchers for nil checking and error handling

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Ruby and RSpec.

Notable practices include:

Isolated test cases with clear objectives
Proper setup and state management
Explicit expectation definitions
Clean and maintainable test structure

paper-trail-gem/paper_trail

spec/models/wotsit_spec.rb

            
# frozen_string_literal: true

require "spec_helper"

RSpec.describe Wotsit, versioning: true do
  it "update! records timestamps" do
    wotsit = described_class.create!(name: "wotsit")
    wotsit.update!(name: "changed")
    reified = wotsit.versions.last.reify
    expect(reified.created_at).not_to(be_nil)
    expect(reified.updated_at).not_to(be_nil)
  end

  it "update! does not raise error" do
    wotsit = described_class.create!(name: "name1")
    expect { wotsit.update!(name: "name2") }.not_to(raise_error)
  end
end