aprs.me/test/time_independence_fixes.md
Graham McIntire 4e00c3cf5d
test: Make tests time-independent and increase timeouts for reliability
- Fix time-dependent tests to use relative dates instead of hardcoded values
- Increase timeout values to prevent flaky failures on slower systems/CI
- Use flexible string matching for time-related assertions
- Update Process.sleep and assert_receive timeouts for better reliability

Specific changes:
- TimeHelpers: Use pattern matching for variable time strings
- PacketsOldest: Replace hardcoded dates with relative calculations
- BroadcastTaskSupervisor: Increase timing assertion to 1s
- Movement tests: Increase refute_push_event timeout to 2s
- Integration tests: Increase all wait times by 50%
- StreamingPacketsPubSub: Increase receive timeouts

These changes ensure tests pass regardless of when they're executed
and are more resilient to performance variations in CI environments.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-08-02 10:07:47 -05:00

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# Time Independence Test Fixes
This document summarizes the changes made to ensure tests pass regardless of when they are executed.
## Fixed Issues
### 1. TimeHelpers Tests (`test/aprsme_web/time_helpers_test.exs`)
- Changed exact string matches to flexible pattern matching
- Example: `"1 minute ago"``["1 minute ago", "about 1 minute ago"]`
- Added regex patterns for variable outputs
### 2. Packets Oldest Tests (`test/aprsme/packets_oldest_test.exs`)
- Replaced hardcoded dates like `~U[2023-01-01 00:00:00Z]`
- Now uses relative dates: `DateTime.add(now, -365 * 24 * 60 * 60, :second)`
- All date calculations are now relative to current time
### 3. Broadcast Task Supervisor Tests (`test/aprsme/broadcast_task_supervisor_test.exs`)
- Increased timing assertion from 100ms to 1000ms
- Makes tests less sensitive to system load and CI environment performance
### 4. Movement Tests (`test/aprsme_web/live/map_live/movement_test.exs`)
- Increased `refute_push_event` timeout from 500ms to 2000ms
- Prevents false failures on slower systems
### 5. Packet Consumer Tests (`test/aprsme/packet_consumer_test.exs`)
- Increased Process.sleep from 20ms to 100ms for async operations
- Increased assert_receive timeout from 1000ms to 5000ms
### 6. Integration Tests (`test/integration/historical_loading_integration_test.exs`)
- Increased all Process.sleep calls: 500ms → 1000ms, 2000ms → 3000ms
- Gives Wallaby more time for browser operations
### 7. Streaming Packets PubSub Tests (`test/aprsme/streaming_packets_pubsub_test.exs`)
- Increased assert_receive timeout from 100ms to 1000ms
- Increased refute_receive timeout from 100ms to 500ms
## General Patterns Applied
1. **Relative Time Calculations**: All date/time calculations now use offsets from `DateTime.utc_now()`
2. **Flexible Assertions**: String comparisons allow for slight variations in output
3. **Generous Timeouts**: Increased timeouts to handle slower CI environments
4. **No Hardcoded Dates**: Removed all specific date literals
## Testing Strategy
These changes ensure that:
- Tests pass regardless of the current date/time
- Tests are resilient to performance variations
- Tests work reliably in CI/CD environments
- Tests don't fail due to timezone differences