metamask-extension/test/unit/migrations/034-test.js

import assert from 'assert'
import migration34 from '../../../app/scripts/migrations/034'

describe('migration #34', function () {
  it('should update the version metadata', function (done) {
    const oldStorage = {
      meta: {
        version: 33,
      },
      data: {},
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.meta, {
          version: 34,
        })
        done()
      })
      .catch(done)
  })

  it('should set migratedPrivacyMode & privacyMode if featureFlags.privacyMode was false', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        PreferencesController: {
          featureFlags: {
            privacyMode: false,
          },
        },
      },
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data.PreferencesController, {
          migratedPrivacyMode: true,
          featureFlags: {
            privacyMode: true,
          },
        })
        done()
      })
      .catch(done)
  })

  it('should NOT change any state if migratedPrivacyMode is already set to true', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        PreferencesController: {
          migratedPrivacyMode: true,
          featureFlags: {
            privacyMode: true,
          },
        },
      },
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, oldStorage.data)
        done()
      })
      .catch(done)
  })

  it('should NOT change any state if migratedPrivacyMode is already set to false', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        PreferencesController: {
          migratedPrivacyMode: false,
          featureFlags: {
            privacyMode: true,
          },
        },
      },
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, oldStorage.data)
        done()
      })
      .catch(done)
  })

  it('should NOT change any state if PreferencesController is missing', function (done) {
    const oldStorage = {
      meta: {},
      data: {},
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, oldStorage.data)
        done()
      })
      .catch(done)
  })

  it('should NOT change any state if featureFlags.privacyMode is already true', function (done) {
    const oldStorage = {
      meta: {},
      data: {
        PreferencesController: {
          featureFlags: {
            privacyMode: true,
          },
        },
      },
    }

    migration34
      .migrate(oldStorage)
      .then((newStorage) => {
        assert.deepEqual(newStorage.data, oldStorage.data)
        done()
      })
      .catch(done)
  })
})