Research-Stack/5-Applications/nodupe/docs/guides/implementation_plan.md
2026-05-05 21:15:26 -05:00

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# Implementation Plan: Update Test Files to Use time.monotonic()
## Overview
Update test utility files to mock `time.monotonic()` instead of `time.time()` to align with the production codebase that has been migrated to use monotonic time for performance measurement and timing operations.
## Types
No new types are needed. This is a targeted update to existing test utility functions that mock time-related functions.
## Files
### New Files to be Created
None
### Existing Files to be Modified
1. **tests/utils/performance.py** - Update `simulate_slow_operations()` and `simulate_performance_degradation()` functions
2. **tests/utils/errors.py** - Update `simulate_timeout_errors()` function
### Files to be Deleted or Moved
None
### Configuration File Updates
None required
## Functions
### Modified Functions
#### tests/utils/performance.py
**Function: simulate_slow_operations()**
- **Current**: Patches `time.time` and `time.sleep` to simulate slow operations
- **Change**: Update to patch `time.monotonic` instead of `time.time`
- **Impact**: Performance testing utilities will correctly mock monotonic time
**Function: simulate_performance_degradation()**
- **Current**: Patches `time.time` to simulate performance degradation
- **Change**: Update to patch `time.monotonic` instead of `time.time`
- **Impact**: Performance degradation simulation will use monotonic time
#### tests/utils/errors.py
**Function: simulate_timeout_errors()**
- **Current**: Patches `time.time` and `time.sleep` to simulate timeout errors
- **Change**: Update to patch `time.monotonic` instead of `time.time`
- **Impact**: Timeout error simulation will use monotonic time
## Classes
No class modifications are required.
## Dependencies
No new dependencies are needed. The changes only involve updating existing mock patches to target different time functions.
## Testing
### Test File Requirements
- Verify that existing tests still pass after the changes
- Ensure that performance testing utilities work correctly with monotonic time
- Validate that timeout error simulation functions properly
### Existing Test Modifications
No existing test modifications are needed as the changes are in utility functions that are used by tests.
### Validation Strategies
1. Run the full test suite to ensure no regressions
2. Specifically test performance utility functions
3. Test timeout error simulation scenarios
4. Verify that mocked time behaves correctly in test scenarios
## Implementation Order
### Step 1: Update tests/utils/performance.py
1. Modify `simulate_slow_operations()` function:
- Change `patch('time.time', side_effect=slow_time)` to `patch('time.monotonic', side_effect=slow_time)`
- Update the `slow_time()` function to work with monotonic time
- Ensure the variability calculation is appropriate for monotonic time
2. Modify `simulate_performance_degradation()` function:
- Change `patch('time.time', side_effect=degraded_time)` to `patch('time.monotonic', side_effect=degraded_time)`
- Update the `degraded_time()` function to work with monotonic time
- Ensure degradation calculations are appropriate for monotonic time
### Step 2: Update tests/utils/errors.py
1. Modify `simulate_timeout_errors()` function:
- Change `patch('time.time', side_effect=slow_time)` to `patch('time.monotonic', side_effect=slow_time)`
- Update the `slow_time()` function to work with monotonic time
- Ensure timeout detection logic works correctly with monotonic time
### Step 3: Test and Validate
1. Run the full test suite to ensure no regressions
2. Test specific performance utility functions
3. Test timeout error simulation scenarios
4. Verify that all mocked time operations work correctly
### Step 4: Documentation Update
1. Update any inline documentation if needed
2. Add comments explaining the use of monotonic time in test utilities
3. Ensure the changes are consistent with the production codebase migration