dead-code.test.ts — dead-code-hunter Source File

Source Code

import { describe, it, expect } from 'vitest';
import { filterByIgnorePatterns, filterByChangedFiles, formatPrComment } from '../dead-code';
import { escapeTableCell } from '../markdown';
import type { DeadCodeCandidate, DeadCodeAnalysisMetadata } from '@supermodeltools/sdk';

function makeCandidate(overrides: Partial<DeadCodeCandidate> = {}): DeadCodeCandidate {
  return {
    file: 'src/utils.ts',
    name: 'unusedFn',
    line: 10,
    type: 'function' as const,
    confidence: 'high' as const,
    reason: 'No callers found in codebase',
    ...overrides,
  };
}

function makeMetadata(overrides: Partial<DeadCodeAnalysisMetadata> = {}): DeadCodeAnalysisMetadata {
  return {
    totalDeclarations: 100,
    deadCodeCandidates: 5,
    aliveCode: 95,
    analysisMethod: 'parse_graph + call_graph',
    ...overrides,
  };
}

describe('escapeTableCell', () => {
  it('should escape pipe characters', () => {
    expect(escapeTableCell('a|b|c')).toBe('a\\|b\\|c');
  });

  it('should replace newlines with spaces', () => {
    expect(escapeTableCell('line1\nline2')).toBe('line1 line2');
  });

  it('should handle both pipes and newlines', () => {
    expect(escapeTableCell('a|b\nc|d')).toBe('a\\|b c\\|d');
  });

  it('should return unchanged string when no special characters', () => {
    expect(escapeTableCell('normalText')).toBe('normalText');
  });
});

describe('filterByIgnorePatterns', () => {
  it('should return all candidates when no patterns provided', () => {
    const candidates = [makeCandidate(), makeCandidate({ file: 'src/helpers.ts' })];
    const result = filterByIgnorePatterns(candidates, []);
    expect(result).toHaveLength(2);
  });

  it('should filter candidates matching ignore patterns', () => {
    const candidates = [
      makeCandidate({ file: 'src/generated/api.ts' }),
      makeCandidate({ file: 'src/utils.ts' }),
    ];
    const result = filterByIgnorePatterns(candidates, ['**/generated/**']);
    expect(result).toHaveLength(1);
    expect(result[0].file).toBe('src/utils.ts');
// ... (187 more lines)