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Validating Versioner Option Error Handling in ruby-grape/grape

This test suite validates the error handling functionality for invalid versioner options in the Grape framework. It specifically focuses on testing the error message generation when incorrect versioning configurations are provided, ensuring proper error feedback for developers.

Test Coverage Overview

The test coverage focuses on the InvalidVersionerOption exception class in Grape, specifically validating error message generation for invalid versioner configurations.

Tests error message content for invalid ‘headers’ versioner option
Verifies exception handling for incorrect versioning configurations
Ensures proper error feedback mechanisms

Implementation Analysis

The testing approach utilizes RSpec’s describe blocks and let statements to organize test cases efficiently. The implementation employs a focused unit test pattern that isolates the error message functionality.

Key patterns include:

Using described_class for flexible test maintenance
Leveraging RSpec expectations for message content verification
Implementing isolated test cases for specific error scenarios

Technical Details

Testing Framework: RSpec
Test Type: Unit Test
Key Classes: Grape::Exceptions::InvalidVersionerOption
Configuration: Frozen string literal enabled
Testing Tools: RSpec matchers and expectations

Best Practices Demonstrated

The test suite demonstrates several testing best practices for Ruby and RSpec implementations.

Clear test case isolation and single responsibility
Descriptive context and expectation definitions
Efficient use of RSpec’s let blocks for setup
Proper exception testing patterns
Clean and maintainable test structure

ruby-grape/grape

spec/grape/exceptions/invalid_versioner_option_spec.rb

            
# frozen_string_literal: true

describe Grape::Exceptions::InvalidVersionerOption do
  describe '#message' do
    let(:error) do
      described_class.new('headers')
    end

    it 'contains the problem in the message' do
      expect(error.message).to include(
        'unknown :using for versioner: headers'
      )
    end
  end
end