index.js

const { fixDuplicates, listDuplicates } = require('../index.js');
const lockfile = require('@yarnpkg/lockfile');
const outdent = require('outdent');

test('dedupes lockfile to max compatible version', () => {
    const yarn_lock = outdent`
    library@^1.1.0:
      version "1.2.0"
      resolved "https://example.net/library@^1.1.0"

    library@^1.2.0:
      version "1.2.0"
      resolved "https://example.net/library@^1.2.0"

    library@^1.3.0:
      version "1.3.0"
      resolved "https://example.net/library@^1.3.0"
    `;
    const deduped = fixDuplicates(yarn_lock);
    const json = lockfile.parse(deduped).object;

    expect(json['library@^1.1.0']['version']).toEqual('1.3.0');
    expect(json['library@^1.2.0']['version']).toEqual('1.3.0');
    expect(json['library@^1.3.0']['version']).toEqual('1.3.0');

    const list = listDuplicates(yarn_lock);

    expect(list).toContain('Package "library" wants ^1.2.0 and could get 1.3.0, but got 1.2.0');
    expect(list).toContain('Package "library" wants ^1.1.0 and could get 1.3.0, but got 1.2.0');
});

test('dedupes lockfile to most common compatible version', () => {
    const yarn_lock = outdent`
    library@>=1.0.0:
      version "3.0.0"
      resolved "https://example.net/library@^3.0.0"

    library@>=1.1.0:
      version "3.0.0"
      resolved "https://example.net/library@^3.0.0"

    library@^2.0.0:
      version "2.1.0"
      resolved "https://example.net/library@^2.1.0"
  `;
    const deduped = fixDuplicates(yarn_lock, {
        useMostCommon: true,
    });
    const json = lockfile.parse(deduped).object;

    expect(json['library@>=1.0.0']['version']).toEqual('2.1.0');
    expect(json['library@>=1.1.0']['version']).toEqual('2.1.0');
    expect(json['library@^2.0.0']['version']).toEqual('2.1.0');

    const list = listDuplicates(yarn_lock, {
        useMostCommon: true,
    });

    expect(list).toContain('Package "library" wants >=1.0.0 and could get 2.1.0, but got 3.0.0');
    expect(list).toContain('Package "library" wants >=1.1.0 and could get 2.1.0, but got 3.0.0');
});

test('limits the packages to be de-duplicated', () => {
    const yarn_lock = outdent`
    a-package@^2.0.0:
      version "2.0.0"
      resolved "http://example.com/a-package/2.1.0"

    a-package@^2.0.1:
      version "2.0.1"
      resolved "http://example.com/a-package/2.2.0"

    other-package@^1.0.0:
      version "1.0.11"
      resolved "http://example.com/other-package/1.0.0"

    other-package@^1.0.1:
      version "1.0.12"
      resolved "http://example.com/other-package/1.0.0"
  `;

    const deduped = fixDuplicates(yarn_lock, {
        includePackages: ['other-package'],
    });
    const json = lockfile.parse(deduped).object;

    expect(json['a-package@^2.0.0']['version']).toEqual('2.0.0');
    expect(json['a-package@^2.0.1']['version']).toEqual('2.0.1');
    expect(json['other-package@^1.0.0']['version']).toEqual('1.0.12');
    expect(json['other-package@^1.0.1']['version']).toEqual('1.0.12');

    const list = listDuplicates(yarn_lock, {
        includePackages: ['other-package'],
    });

    expect(list).toHaveLength(1);
    expect(list).toContain(
        'Package "other-package" wants ^1.0.0 and could get 1.0.12, but got 1.0.11'
    );
});

test('should support the integrity field if present', () => {
    const yarn_lock = outdent({ trimTrailingNewline: false })`
    # THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
    # yarn lockfile v1


    a-package@^2.0.0:
      version "2.0.1"
      resolved "http://example.com/a-package/2.0.1"
      integrity sha512-ptqFDzemkXGMf7ylch/bCV+XTDvVjD9dRymzcjOPIxg8Hqt/uesOye10GXItFbsxJx9VZeJBYrR8FFTauu+hHg==
      dependencies:
        a-second-package "^2.0.0"

    a-second-package@^2.0.0:
      version "2.0.1"
      resolved "http://example.com/a-second-package/2.0.1"
      integrity sha512-ptqFDzemkXGMf7ylch/bCV+XTDvVjD9dRymzcjOPIxg8Hqt/uesOye10GXItFbsxJx9VZeJBYrR8FFTauu+hHg==
  `;

    const deduped = fixDuplicates(yarn_lock);

    // We should not have made any change to the order of outputted lines (@yarnpkg/lockfile 1.0.0 had this bug)
    expect(yarn_lock).toBe(deduped);
});