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Testing Object Classification Implementation in friendly_id

This test suite validates the ObjectUtils functionality in FriendlyId, focusing on ID type validation and classification. It ensures proper handling of friendly and unfriendly identifiers across different data types including strings, integers, and ActiveRecord instances.

Test Coverage Overview

The test suite provides comprehensive coverage of FriendlyId’s object classification system. It validates the behavior of friendly_id? and unfriendly_id? methods across different data types.

String-based ID validation
Integer ID classification
Numeric string edge cases
ActiveRecord instance handling

Implementation Analysis

The testing approach uses Minitest’s assertion framework with focused unit tests for each ID type scenario. The implementation follows a behavior-driven pattern, explicitly testing positive and negative cases for ID classification.

Direct method testing using assert statements
Class-level configuration validation
Dynamic class creation for ActiveRecord testing

Technical Details

Testing Framework: Minitest
Test Helper Integration
FriendlyId::Test module inclusion
ActiveRecord configuration
Dynamic class generation

Best Practices Demonstrated

The test suite exemplifies clean testing practices with isolated test cases and clear assertions. Each test focuses on a single aspect of ID classification, making the suite maintainable and readable.

Single responsibility per test
Clear test naming conventions
Proper test isolation
Comprehensive edge case coverage

norman/friendly_id

test/object_utils_test.rb

            
require "helper"

class ObjectUtilsTest < TestCaseClass
  include FriendlyId::Test

  test "strings with letters are friendly_ids" do
    assert "a".friendly_id?
  end

  test "integers should be unfriendly ids" do
    assert 1.unfriendly_id?
  end

  test "numeric strings are neither friendly nor unfriendly" do
    assert_nil "1".friendly_id?
    assert_nil "1".unfriendly_id?
  end

  test "ActiveRecord::Base instances should be unfriendly_ids" do
    FriendlyId.mark_as_unfriendly(ActiveRecord::Base)

    model_class = Class.new(ActiveRecord::Base) do
      self.table_name = "authors"
    end
    assert model_class.new.unfriendly_id?
  end
end