Use.test.ts

import {ppath, xfs, npath}        from '@yarnpkg/fslib';
import assert                     from 'node:assert';
import process                    from 'node:process';
import {describe, beforeEach, it} from 'node:test';

import {runCli}                   from './_runCli';

function expect(promise: Promise<Record<string, unknown>>) {
  return {
    resolves: {
      async toMatchObject(expected: Record<string, unknown>) {
        const result = await promise;

        assert.deepStrictEqual(Object.fromEntries(Object.entries(result).filter(e => e[0] in expected)), expected);
      },
    },
  };
}


beforeEach(async () => {
  process.env.COREPACK_HOME = npath.fromPortablePath(await xfs.mktempPromise());
  process.env.COREPACK_DEFAULT_TO_LATEST = `0`;
});

describe(`UseCommand`, () => {
  it(`should set the package manager in the current project`, async () => {
    await xfs.mktempPromise(async cwd => {
      await xfs.writeJsonPromise(ppath.join(cwd, `package.json`), {
        packageManager: `yarn@1.0.0`,
      });

      await expect(runCli(cwd, [`use`, `yarn@1.22.4`])).resolves.toMatchObject({
        exitCode: 0,
      });

      await expect(xfs.readJsonPromise(ppath.join(cwd, `package.json`))).resolves.toMatchObject({
        packageManager: `yarn@1.22.4+sha256.bc5316aa110b2f564a71a3d6e235be55b98714660870c5b6b2d2d3f12587fb58`,
      });

      await expect(runCli(cwd, [`yarn`, `--version`])).resolves.toMatchObject({
        exitCode: 0,
        stdout: `1.22.4\n`,
      });
    });
  });

  it(`should create a package.json if absent`, async () => {
    await xfs.mktempPromise(async cwd => {
      await expect(runCli(cwd, [`use`, `yarn@1.22.4`])).resolves.toMatchObject({
        exitCode: 0,
        stderr: `warning package.json: No license field\nwarning No license field\n`,
      });

      await expect(xfs.readJsonPromise(ppath.join(cwd, `package.json`))).resolves.toMatchObject({
        packageManager: `yarn@1.22.4+sha256.bc5316aa110b2f564a71a3d6e235be55b98714660870c5b6b2d2d3f12587fb58`,
      });

      await expect(runCli(cwd, [`yarn`, `--version`])).resolves.toMatchObject({
        exitCode: 0,
        stdout: `1.22.4\n`,
        stderr: ``,
      });

      // Ensure Corepack is able to detect package.json in parent directory
      const subfolder = ppath.join(cwd, `subfolder`);
      await xfs.mkdirPromise(subfolder);

      await expect(runCli(subfolder, [`use`, `yarn@2.2.2`])).resolves.toMatchObject({
        exitCode: 0,
        stderr: ``,
      });
      await expect(runCli(cwd, [`yarn`, `--version`])).resolves.toMatchObject({
        exitCode: 0,
        stdout: `2.2.2\n`,
        stderr: ``,
      });
    });
  });
});