Back to Repositories

Testing Unknown Options Exception Handling in grape

This test suite examines the UnknownOptions exception handling in the Grape framework. It focuses on verifying proper error message generation when invalid options are provided to Grape API endpoints. The tests ensure robust error handling for unknown configuration options.

Test Coverage Overview

The test coverage focuses on the error messaging functionality of Grape’s UnknownOptions exception class.

Verifies error message content for unknown option symbols
Tests basic exception instantiation with array parameters
Validates error message string inclusion

Implementation Analysis

The testing approach utilizes RSpec’s describe and let blocks to establish a clean testing context for exception behavior. The implementation leverages RSpec’s expectation syntax to verify error message contents, demonstrating a focused unit testing pattern for exception handling.

Uses RSpec’s described_class for flexible test maintenance
Implements let blocks for test setup isolation
Employs string inclusion matching for message verification

Technical Details

Testing Framework: RSpec
Test Type: Unit Test
Key Dependencies: Grape framework
Test Setup: Frozen string literal enabled
Exception Class: Grape::Exceptions::UnknownOptions

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Ruby exception handling verification. It maintains single responsibility by focusing on specific exception behavior, uses descriptive context blocks, and implements clean setup with let blocks.

Isolated test setup
Clear test descriptions
Focused assertion scope
DRY test implementation

ruby-grape/grape

spec/grape/exceptions/unknown_options_spec.rb

            
# frozen_string_literal: true

describe Grape::Exceptions::UnknownOptions do
  describe '#message' do
    let(:error) do
      described_class.new(%i[a b])
    end

    it 'contains the problem in the message' do
      expect(error.message).to include(
        'unknown options: '
      )
    end
  end
end