This test suite ensures proper isolation and dependency management in the concurrent-ruby library by verifying that no concurrent-ruby files are loaded prematurely. It validates the test harness configuration to maintain clean test environments and prevent unintended file loading.
Test Coverage Overview
The test suite focuses on validating the initialization state of the test environment, specifically checking that no concurrent-ruby files are loaded before test execution. Key functionality includes:
- Verification of $LOADED_FEATURES global variable contents
- Filtering for concurrent-ruby specific files
- Exclusion of version.rb from the check
- Validation of empty loaded files array
Implementation Analysis
The testing approach employs RSpec’s describe and it blocks to isolate the test environment validation. It utilizes Ruby’s built-in $LOADED_FEATURES array and regular expressions for file path filtering.
The implementation leverages:
- Conditional test execution using ENV[‘ISOLATED’]
- Grep pattern matching for file path filtering
- Negative pattern matching with grep_v
- RSpec equality matcher for array comparison
Technical Details
Testing tools and configuration:
- RSpec test framework
- Environment variable ISOLATED for conditional execution
- Ruby’s $LOADED_FEATURES global array
- Regular expression patterns for file filtering
- Array manipulation methods (grep, grep_v)
Best Practices Demonstrated
The test exemplifies several testing best practices in Ruby environment isolation and dependency management.
- Environment-specific test execution
- Explicit dependency checking
- Clean test environment validation
- Precise file pattern matching
- Clear test intention documentation
