metamask-extension/test/unit/migrations/042-test.js

import assert from 'assert';
import migration42 from '../../../app/scripts/migrations/042';

describe('migration #42', function () {
  it('should update the version metadata', function (done) {
    const oldStorage = {
      meta: {
        version: 41,
      },
      data: {},
    };

    migration42
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.meta, {
          version: 42,
        });
        done();
      })
      .catch(done);
  });

  it('should set connectedStatusPopoverHasBeenShown to false', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        AppStateController: {
          connectedStatusPopoverHasBeenShown: true,
          bar: 'baz',
        },
        foo: 'bar',
      },
    };

    migration42
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, {
          AppStateController: {
            connectedStatusPopoverHasBeenShown: false,
            bar: 'baz',
          },
          foo: 'bar',
        });
        done();
      })
      .catch(done);
  });

  it('should initialize AppStateController if it does not exist', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        foo: 'bar',
      },
    };

    migration42
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, {
          foo: 'bar',
          AppStateController: {
            connectedStatusPopoverHasBeenShown: false,
          },
        });
        done();
      })
      .catch(done);
  });
});