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Testing M3U Playlist Formatting Implementation in IPTV-org Repository

This test suite validates the playlist formatting functionality in the IPTV-org repository. It ensures that M3U playlists are correctly formatted according to specified standards and file structure requirements.

Test Coverage Overview

The test suite provides comprehensive coverage for playlist formatting operations.

Key areas tested include:

File system operations for playlist manipulation
M3U playlist format validation
Content comparison between formatted and expected outputs
Directory structure maintenance

Edge cases covered include empty directories and file encoding consistency.

Implementation Analysis

The testing approach utilizes Jest’s beforeEach hooks for test isolation and setup. The implementation leverages Node.js child_process for command execution and fs-extra for enhanced file operations.

Notable patterns include:

Directory cleanup and initialization before each test
Synchronous file operations for deterministic testing
Glob pattern matching for file selection
Content comparison using Jest’s expect assertions

Technical Details

Testing tools and configuration:

Jest as the primary testing framework
fs-extra for enhanced file system operations
glob for file pattern matching
child_process for CLI command execution
UTF-8 encoding for file operations
Custom helper functions for file content reading

Best Practices Demonstrated

The test implementation showcases several testing best practices.

Notable practices include:

Isolated test environments through directory cleanup
Consistent file encoding handling
Modular helper functions
Clear test case organization
Effective use of Jest’s assertion library
Proper error handling and resource cleanup

iptv-org/iptv

tests/commands/playlist/format.test.ts

            
import { execSync } from 'child_process'
import * as fs from 'fs-extra'
import { glob } from 'glob'

beforeEach(() => {
  fs.emptyDirSync('tests/__data__/output')
  fs.copySync('tests/__data__/input/streams_format', 'tests/__data__/output/streams')
})

it('can format playlists', () => {
  execSync('STREAMS_DIR=tests/__data__/output/streams npm run playlist:format', {
    encoding: 'utf8'
  })

  const files = glob
    .sync('tests/__data__/expected/streams_format/*.m3u')
    .map(f => f.replace('tests/__data__/expected/streams_format/', ''))

  files.forEach(filepath => {
    expect(content(`output/streams/${filepath}`), filepath).toBe(
      content(`expected/streams_format/${filepath}`)
    )
  })
})

function content(filepath: string) {
  return fs.readFileSync(`tests/__data__/${filepath}`, {
    encoding: 'utf8'
  })
}