[WIP] Add test coverage for topicEvolution.js to reach 100%

[Copilot]

• Analyze topicEvolution.js and identify all uncovered code paths
• Add missing NarrativeMemory methods (recordTopicAngle, getTopicCluster, setTopicPhase)
• Implement comprehensive tests for TopicEvolution class:
  • Constructor and initialization tests (13 tests)
  • Helper methods (_kebab, _cacheKey) (8 tests)
  • Cache management (_getCache, _setCache) (4 tests)
  • Subtopic labeling (labelSubtopic) with and without LLM (12 tests)
  • Phase inference (_inferPhaseFromSubtopic) (6 tests)
  • Phase detection (_detectPhase) (7 tests)
  • Evolution score calculation (_evolutionScore) (8 tests)
  • Full analysis workflow (analyze method) (15 tests)
  • Integration with NarrativeMemory (5 tests)
  • Edge cases and error handling (14 tests)
• Verify 100% coverage achievement
• Run all tests to ensure no regressions

Original prompt

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This section details on the original issue you should resolve

<issue_title>Test coverage for topicEvolution.js (31.76% → 100%)</issue_title>
<issue_description>## Overview

The topicEvolution.js tracks how topics evolve over time, identifies trending topics, and monitors topic lifecycle. With 31.76% coverage, topic evolution tracking and trend analysis are largely untested.

Current Coverage

• Statements: 31.76%
• Branches: 76.47%
• Functions: 10.00%
• Lines: 31.76%
• Target: 100% coverage

Uncovered Areas

Major untested sections:

• Topic evolution tracking
• Trend identification
• Topic lifecycle monitoring
• Evolution metrics calculation
• Historical topic data
• Trend scoring
• Evolution notifications
• Topic momentum tracking

Key Functionality to Test

1. Evolution Tracking

• Recording topic appearances
• Tracking frequency changes
• Measuring growth rates
• Identifying decay
• Time-series data management

2. Trend Detection

• Identifying emerging topics
• Detecting trending topics
• Spotting declining topics
• Trend momentum calculation
• Trend scoring

3. Lifecycle Monitoring

• New topic detection
• Peak identification
• Decline tracking
• Topic retirement
• Revival detection

4. Metrics & Analytics

• Growth rate calculations
• Velocity measurements
• Acceleration detection
• Comparative analysis
• Historical comparisons

Testing Strategy

describe('TopicEvolution', () => {
  describe('Initialization', () => {
    test('initializes with config');
    test('loads historical data');
    test('sets up tracking structures');
  });

  describe('Evolution Tracking', () => {
    test('records topic appearances');
    test('tracks frequency changes');
    test('calculates growth rates');
    test('detects decay patterns');
    test('manages time-series data');
  });

  describe('Trend Detection', () => {
    test('identifies emerging topics');
    test('detects trending topics');
    test('spots declining topics');
    test('calculates trend momentum');
    test('scores trend strength');
  });

  describe('Lifecycle Monitoring', () => {
    test('detects new topics');
    test('identifies peak moments');
    test('tracks decline phases');
    test('handles topic retirement');
    test('detects topic revivals');
  });

  describe('Metrics Calculation', () => {
    test('calculates growth rates');
    test('measures velocity');
    test('detects acceleration');
    test('performs comparative analysis');
    test('generates historical comparisons');
  });

  describe('Integration', () => {
    test('integrates with context accumulator');
    test('provides data to narrative memory');
    test('supports evolution-aware prompts');
  });
});

Test Fixtures Needed

• Time-series topic data
• Trending topic scenarios
• Topic lifecycle examples
• Historical evolution data
• Edge cases (sudden spikes, drops)

Acceptance Criteria

• Evolution tracking fully tested
• Trend detection verified
• Lifecycle monitoring covered
• Metrics calculation tested
• Integration points verified
• Edge cases handled
• Overall coverage 100%

Related

• Parent: Increase plugin-nostr test coverage to 100% #39 - Increase plugin-nostr test coverage to 100%
• Related: lib/contextAccumulator.js - Topic data source
• Related: lib/narrativeMemory.js - Consumes evolution data
• See: EVOLUTION_AWARE_PROMPTS.md

Priority

🟡 MEDIUM - Enhances narrative awareness and topic-based responses.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #51

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