Bug 1956080 - Write enrollment updates to the NimbusEnrollments table r=jhirsch,nimbus-reviewers,relud,nalexander

Differential Revision: https://phabricator.services.mozilla.com/D249472

toolkit/components/nimbus/lib/ExperimentManager.sys.mjs

@@ -482,6 +482,10 @@ export class ExperimentManager {
    *                 as `recipe` and re-enrollment is prevented.
    */
   async enroll(recipe, source, { reenroll = false, branchSlug } = {}) {
+    if (typeof source !== "string") {
+      throw new Error("source is required");
+    }
+
     let { slug, branches, bucketConfig, isFirefoxLabsOptIn } = recipe;
 
     const enrollment = this.store.get(slug);
@@ -573,11 +577,11 @@ export class ExperimentManager {
       }
     }
 
-    return this._enroll(recipe, branch, source);
+    return this._enroll(recipe, branch.slug, source);
   }
 
-  async _enroll(
-    {
+  async _enroll(recipe, branchSlug, source) {
+    const {
       slug,
       userFacingName,
       userFacingDescription,
@@ -590,10 +594,9 @@ export class ExperimentManager {
       firefoxLabsDescriptionLinks = null,
       firefoxLabsGroup,
       requiresRestart = false,
-    },
-    branch,
-    source
-  ) {
+    } = recipe;
+
+    const branch = recipe.branches.find(b => b.slug === branchSlug);
     const { prefs, prefsToSet } = this._getPrefsForBranch(branch, isRollout);
 
     // Unenroll in any conflicting prefFlips enrollments.
@@ -604,7 +607,6 @@ export class ExperimentManager {
       );
     }
 
-    /** @type {Enrollment} */
     const enrollment = {
       slug,
       branch,
@@ -634,13 +636,15 @@ export class ExperimentManager {
     }
 
     await this._prefFlips._annotateEnrollment(enrollment);
-    this.store.addEnrollment(enrollment);
 
-    lazy.NimbusTelemetry.recordEnrollment(enrollment);
+    await this.store._addEnrollmentToDatabase(enrollment, recipe);
+    this.store.addEnrollment(enrollment);
 
     this._setEnrollmentPrefs(prefsToSet);
     this._updatePrefObservers(enrollment);
 
+    lazy.NimbusTelemetry.recordEnrollment(enrollment);
+
     lazy.log.debug(
       `New ${isRollout ? "rollout" : "experiment"} started: ${slug}, ${
         branch.slug
@@ -686,7 +690,7 @@ export class ExperimentManager {
         ...recipe,
         slug,
       },
-      branch,
+      branch.slug,
       lazy.NimbusTelemetry.EnrollmentSource.FORCE_ENROLLMENT
     );
 
@@ -872,6 +876,17 @@ export class ExperimentManager {
       );
     }
 
+    // TODO(bug 1956082): This is an async method that we are not awaiting.
+    //
+    // Changing the entire unenrollment flow to be asynchronous requires changes
+    // to a lot of tests and it only really matters once we're actually checking
+    // the database contents.
+    //
+    // For now, we're going to return the promise which will make unenroll()
+    // awaitable in the few contexts that need to synchronize reads and writes
+    // right now (i.e., tests).
+    await this.store._deactivateEnrollmentInDatabase(slug, cause.reason);
+
     this.store.updateExperiment(slug, {
       active: false,
       unenrollReason: cause.reason,

toolkit/components/nimbus/lib/ExperimentStore.sys.mjs

@@ -7,8 +7,11 @@ import { SharedDataMap } from "resource://nimbus/lib/SharedDataMap.sys.mjs";
 const lazy = {};
 
 ChromeUtils.defineESModuleGetters(lazy, {
+  ExperimentAPI: "resource://nimbus/ExperimentAPI.sys.mjs",
   NimbusFeatures: "resource://nimbus/ExperimentAPI.sys.mjs",
   PrefUtils: "resource://normandy/lib/PrefUtils.sys.mjs",
+  ProfilesDatastoreService:
+    "moz-src:///toolkit/profile/ProfilesDatastoreService.sys.mjs",
 });
 
 // This branch is used to store experiment data
@@ -470,4 +473,103 @@ export class ExperimentStore extends SharedDataMap {
     lazy.syncDataStore.deleteDefault(slugOrFeatureId);
     lazy.syncDataStore.delete(slugOrFeatureId);
   }
+
+  async _addEnrollmentToDatabase(enrollment, recipe) {
+    if (
+      !Services.prefs.getBoolPref(
+        "nimbus.profilesdatastoreservice.enabled",
+        false
+      )
+    ) {
+      // We are in an xpcshell test that has not initialized the
+      // ProfilesDatastoreService.
+      //
+      // TODO(bug 1967779): require the ProfilesDatastoreService to be initialized
+      // and remove this check.
+      return;
+    }
+
+    const profileId = lazy.ExperimentAPI.profileId;
+
+    const conn = await lazy.ProfilesDatastoreService.getConnection();
+    await conn.execute(
+      `
+      INSERT INTO NimbusEnrollments VALUES(
+        null,
+        :profileId,
+        :slug,
+        :branchSlug,
+        jsonb(:recipe),
+        :active,
+        :unenrollReason,
+        :lastSeen,
+        jsonb(:setPrefs),
+        jsonb(:prefFlips),
+        :source
+      )
+      ON CONFLICT(profileId, slug)
+      DO UPDATE SET
+        branchSlug = excluded.branchSlug,
+        recipe = excluded.recipe,
+        active = excluded.active,
+        unenrollReason = excluded.unenrollReason,
+        lastSeen = excluded.lastSeen,
+        setPrefs = excluded.setPrefs,
+        prefFlips = excluded.setPrefs,
+        source = excluded.source;
+      `,
+      {
+        profileId,
+        slug: enrollment.slug,
+        branchSlug: enrollment.branch.slug,
+        recipe: recipe ? JSON.stringify(recipe) : null,
+        active: enrollment.active,
+        unenrollReason: null,
+        lastSeen: enrollment.lastSeen,
+        setPrefs: enrollment.prefs ? JSON.stringify(enrollment.prefs) : null,
+        prefFlips: enrollment.prefFlips
+          ? JSON.stringify(enrollment.prefFlips)
+          : null,
+        source: enrollment.source,
+      }
+    );
+  }
+
+  async _deactivateEnrollmentInDatabase(slug, unenrollReason = "unknown") {
+    if (
+      !Services.prefs.getBoolPref(
+        "nimbus.profilesdatastoreservice.enabled",
+        false
+      )
+    ) {
+      // We are in an xpcshell test that has not initialized the
+      // ProfilesDatastoreService.
+      //
+      // TODO(bug 1967779): require the ProfilesDatastoreService to be initialized
+      // and remove this check.
+      return;
+    }
+
+    const profileId = lazy.ExperimentAPI.profileId;
+
+    const conn = await lazy.ProfilesDatastoreService.getConnection();
+    await conn.execute(
+      `
+      UPDATE NimbusEnrollments SET
+        active = false,
+        unenrollReason = :unenrollReason,
+        recipe = null,
+        prefFlips = null,
+        setPrefs = null
+      WHERE
+        profileId = :profileId AND
+        slug = :slug;
+    `,
+      {
+        slug,
+        profileId,
+        unenrollReason,
+      }
+    );
+  }
 }

toolkit/components/nimbus/lib/PrefFlipsFeature.sys.mjs

@@ -518,7 +518,7 @@ export class PrefFlipsFeature {
     const entry = this.#prefs.get(pref);
 
     if (entry.branch !== branch || entry.value !== value) {
-      throw new PrefFlipsFailedError(pref);
+      throw new PrefFlipsFailedError(pref, value);
     }
 
     entry.slugs.add(slug);

toolkit/components/nimbus/test/NimbusTestUtils.sys.mjs

@@ -16,10 +16,12 @@ ChromeUtils.defineESModuleGetters(lazy, {
   JsonSchema: "resource://gre/modules/JsonSchema.sys.mjs",
   NetUtil: "resource://gre/modules/NetUtil.sys.mjs",
   ExperimentManager: "resource://nimbus/lib/ExperimentManager.sys.mjs",
+  ObjectUtils: "resource://gre/modules/ObjectUtils.sys.mjs",
   ProfilesDatastoreService:
     "moz-src:///toolkit/profile/ProfilesDatastoreService.sys.mjs",
   RemoteSettingsExperimentLoader:
     "resource://nimbus/lib/RemoteSettingsExperimentLoader.sys.mjs",
+  TestUtils: "resource://testing-common/TestUtils.sys.mjs",
   sinon: "resource://testing-common/Sinon.sys.mjs",
 });
 
@@ -133,7 +135,7 @@ export const NimbusTestUtils = {
      * @param {object} store
      *        The `ExperimentStore`.
      */
-    storeIsEmpty(store) {
+    async storeIsEmpty(store) {
       NimbusTestUtils.Assert.deepEqual(
         store
           .getAll()
@@ -159,11 +161,7 @@ export const NimbusTestUtils = {
 
       NimbusTestUtils.cleanupStorePrefCache();
 
-      // TODO(bug 1956082): This is an async method that we are not awaiting.
-      //
-      // Only browser tests and tests that otherwise have manually enabled the
-      // ProfilesDatastoreService need to await the result.
-      return NimbusTestUtils.cleanupEnrollmentDatabase();
+      await NimbusTestUtils.cleanupEnrollmentDatabase();
     },
   },
 
@@ -428,13 +426,32 @@ export const NimbusTestUtils = {
 
     const conn = await lazy.ProfilesDatastoreService.getConnection();
 
-    // TODO(bug 1956080): This should only delete inactive enrollments, but
-    // unenrolling does not yet trigger database writes.
+    const activeSlugs = await conn
+      .execute(
+        `
+        SELECT
+          slug
+        FROM NimbusEnrollments
+        WHERE
+          profileId = :profileId AND
+          active = true;
+      `,
+        { profileId }
+      )
+      .then(rows => rows.map(row => row.getResultByName("slug")));
+
+    NimbusTestUtils.Assert.deepEqual(
+      activeSlugs,
+      [],
+      `No active slugs in NimbusEnrollments for ${profileId}`
+    );
+
     await conn.execute(
       `
         DELETE FROM NimbusEnrollments
         WHERE
-          profileId = :profileId;
+          profileId = :profileId AND
+          active = false;
       `,
       { profileId }
     );
@@ -501,15 +518,9 @@ export const NimbusTestUtils = {
 
     experimentManager.store._syncToChildren({ flush: true });
 
-    return function doEnrollmentCleanup() {
-      // TODO(bug 1956082): This is an async method that we are not awaiting.
-      //
-      // Only browser tests and tests that otherwise have manually enabled the
-      // ProfilesDatastoreService need to await the result.
-      const promise = experimentManager.unenroll(enrollment.slug);
+    return async function doEnrollmentCleanup() {
+      await experimentManager.unenroll(enrollment.slug);
       experimentManager.store._deleteForTests(enrollment.slug);
-
-      return promise;
     };
   },
 
@@ -725,6 +736,9 @@ export const NimbusTestUtils = {
           Services.fog.testResetFOG();
           Services.telemetry.clearEvents();
         }
+
+        // Remove all migration state.
+        Services.prefs.deleteBranch("nimbus.migrations.");
       },
     };
 
@@ -795,6 +809,80 @@ export const NimbusTestUtils = {
       `Experiment ${experiment.slug} not valid`
     );
   },
+
+  /**
+   * Wait for the given slugs to be the only active enrollments in the
+   * NimbusEnrollments table.
+   *
+   * @param {string[]} expectedSlugs The slugs of the only active enrollmetns we
+   * expect.
+   */
+  async waitForActiveEnrollments(expectedSlugs) {
+    const profileId = ExperimentAPI.profileId;
+
+    await lazy.TestUtils.waitForCondition(async () => {
+      const conn = await lazy.ProfilesDatastoreService.getConnection();
+      const slugs = await conn
+        .execute(
+          `
+            SELECT
+              slug
+            FROM NimbusEnrollments
+            WHERE
+              active = true AND
+              profileId = :profileId;
+          `,
+          { profileId }
+        )
+        .then(rows => rows.map(row => row.getResultByName("slug")));
+
+      return lazy.ObjectUtils.deepEqual(slugs.sort(), expectedSlugs.sort());
+    }, `Waiting for enrollments of ${expectedSlugs} to sync to database`);
+  },
+
+  async waitForInactiveEnrollment(slug) {
+    const profileId = ExperimentAPI.profileId;
+
+    await lazy.TestUtils.waitForCondition(async () => {
+      const conn = await lazy.ProfilesDatastoreService.getConnection();
+      const result = await conn.execute(
+        `
+            SELECT
+              active
+            FROM NimbusEnrollments
+            WHERE
+              slug = :slug AND
+              profileId = :profileId;
+          `,
+        { profileId, slug }
+      );
+
+      return result.length === 1 && !result[0].getResultByName("active");
+    }, `Waiting for ${slug} enrollment to exist and be inactive`);
+  },
+
+  async waitForAllUnenrollments() {
+    const profileId = ExperimentAPI.profileId;
+
+    await lazy.TestUtils.waitForCondition(async () => {
+      const conn = await lazy.ProfilesDatastoreService.getConnection();
+      const slugs = await conn
+        .execute(
+          `
+            SELECT
+              slug
+            FROM NimbusEnrollments
+            WHERE
+              active = true AND
+              profileId = :profileId;
+          `,
+          { profileId }
+        )
+        .then(rows => rows.map(row => row.getResultByName("slug")));
+
+      return slugs.length === 0;
+    }, "Waiting for unenrollments to sync to database");
+  },
 };
 
 Object.defineProperties(NimbusTestUtils.factories.experiment, {

toolkit/components/nimbus/test/browser/browser_experimentapi_child.js

@@ -61,7 +61,8 @@ add_task(async function testGetFromChildNewEnrollment() {
         enabled: true,
         testInt: 123,
       },
-    })
+    }),
+    "test"
   );
 
   // Immediately serialize sharedData and broadcast changes to the child processes.
@@ -143,7 +144,8 @@ add_task(async function testGetFromChildExistingEnrollment() {
         enabled: false,
         testInt: 456,
       },
-    })
+    }),
+    "test"
   );
 
   // We don't have to wait for this to update in the client, but we *do* have to

toolkit/components/nimbus/test/browser/browser_nimbus_telemetry.js

@@ -54,7 +54,7 @@ add_task(async function test_experiment_enroll_unenroll_Telemetry() {
     EVENT_FILTER
   );
 
-  cleanup();
+  await cleanup();
 
   TelemetryTestUtils.assertEvents(
     [
@@ -98,7 +98,7 @@ add_task(async function test_experiment_expose_Telemetry() {
     EVENT_FILTER
   );
 
-  cleanup();
+  await cleanup();
 });
 
 add_task(async function test_rollout_expose_Telemetry() {
@@ -132,5 +132,5 @@ add_task(async function test_rollout_expose_Telemetry() {
     EVENT_FILTER
   );
 
-  cleanup();
+  await cleanup();
 });

toolkit/components/nimbus/test/unit/head.js

@@ -1,5 +1,8 @@
 "use strict";
 
+/* import-globals-from ../../../../../toolkit/profile/test/xpcshell/head.js */
+/* import-globals-from ../../../../../browser/components/profiles/tests/unit/head.js */
+
 const { sinon } = ChromeUtils.importESModule(
   "resource://testing-common/Sinon.sys.mjs"
 );
@@ -23,8 +26,19 @@ ChromeUtils.defineESModuleGetters(this, {
 
 NimbusTestUtils.init(this);
 
-add_setup(function () {
+add_setup(async function () {
   do_get_profile();
+
+  await initSelectableProfileService();
+
+  // TODO(bug 1967779): require the ProfilesDatastoreService to be initialized
+  Services.prefs.setBoolPref("nimbus.profilesdatastoreservice.enabled", true);
+  registerCleanupFunction(() => {
+    Services.prefs.setBoolPref(
+      "nimbus.profilesdatastoreservice.enabled",
+      false
+    );
+  });
 });
 
 /**

toolkit/components/nimbus/test/unit/test_ExperimentAPI_ExperimentFeature.js

@@ -64,7 +64,7 @@ add_task(async function test_ExperimentFeature_test_helper_ready() {
     "set by remote config"
   );
 
-  cleanupExperiment();
+  await cleanupExperiment();
   await cleanup();
 });
 
@@ -212,7 +212,7 @@ add_task(async function test_allow_multiple_exposure_events() {
   // We expect 3 events
   Assert.equal(3, exposureEvents.length);
 
-  doExperimentCleanup();
+  await doExperimentCleanup();
   await cleanup();
 });
 

toolkit/components/nimbus/test/unit/test_ExperimentAPI_ExperimentFeature_getVariable.js

@@ -1,9 +1,5 @@
 "use strict";
 
-const { AppConstants } = ChromeUtils.importESModule(
-  "resource://gre/modules/AppConstants.sys.mjs"
-);
-
 const FEATURE_ID = "testfeature1";
 // Note: this gets deleted at the end of tests
 const TEST_PREF_BRANCH = "testfeature1.";

toolkit/components/nimbus/test/unit/test_ExperimentManager_enroll.js

@@ -135,7 +135,7 @@ add_task(async function test_enroll_optin_recipe_branch_selection() {
   Assert.ok(
     manager._enroll.calledOnceWith(
       optInRecipe,
-      optInRecipe.branches[0],
+      optInRecipe.branches[0].slug,
       "test"
     ),
     "should call ._enroll() with the correct arguments"
@@ -871,7 +871,7 @@ add_task(async function test_featureIds_is_stored() {
     "Has expected value"
   );
 
-  doExperimentCleanup();
+  await doExperimentCleanup();
 
   await cleanup();
 });
@@ -907,7 +907,7 @@ add_task(async function experiment_and_rollout_enroll_and_cleanup() {
     )
   );
 
-  doExperimentCleanup();
+  await doExperimentCleanup();
 
   Assert.ok(
     !Services.prefs.getBoolPref(
@@ -921,7 +921,7 @@ add_task(async function experiment_and_rollout_enroll_and_cleanup() {
     )
   );
 
-  doRolloutCleanup();
+  await doRolloutCleanup();
 
   Assert.ok(
     !Services.prefs.getBoolPref(

toolkit/components/nimbus/test/unit/test_ExperimentManager_lifecycle.js

@@ -15,6 +15,10 @@ const { UnenrollmentCause } = ChromeUtils.importESModule(
   "resource://nimbus/lib/ExperimentManager.sys.mjs"
 );
 
+const { ProfilesDatastoreService } = ChromeUtils.importESModule(
+  "moz-src:///toolkit/profile/ProfilesDatastoreService.sys.mjs"
+);
+
 /**
  * onStartup()
  * - should set call setExperimentActive for each active experiment
@@ -364,3 +368,208 @@ add_task(async function test_experimentStore_updateEvent() {
 
   await cleanup();
 });
+
+add_task(async function testDb() {
+  const conn = await ProfilesDatastoreService.getConnection();
+
+  function processRow(row) {
+    const fields = [
+      "profileId",
+      "slug",
+      "branchSlug",
+      "recipe",
+      "active",
+      "unenrollReason",
+      "lastSeen",
+      "setPrefs",
+      "prefFlips",
+      "source",
+    ];
+
+    const processed = {};
+
+    for (const field of fields) {
+      processed[field] = row.getResultByName(field);
+    }
+
+    processed.recipe = JSON.parse(processed.recipe);
+    processed.setPrefs = JSON.parse(processed.setPrefs);
+    processed.prefFlips = JSON.parse(processed.prefFlips);
+
+    return processed;
+  }
+
+  async function getEnrollment(slug) {
+    const results = await conn.execute(
+      `
+      SELECT
+        profileId,
+        slug,
+        branchSlug,
+        json(recipe) AS recipe,
+        active,
+        unenrollReason,
+        lastSeen,
+        json(setPrefs) AS setPrefs,
+        json(prefFlips) AS prefFlips,
+        source
+      FROM NimbusEnrollments
+      WHERE
+        slug = :slug AND
+        profileId = :profileId;
+    `,
+      { slug, profileId: ExperimentAPI.profileId }
+    );
+
+    Assert.equal(
+      results.length,
+      1,
+      `Exactly one enrollment should be returned for ${slug}`
+    );
+    return processRow(results[0]);
+  }
+
+  async function getEnrollmentSlugs() {
+    const result = await conn.execute(
+      `
+      SELECT
+        slug
+      FROM NimbusEnrollments
+      WHERE
+        profileId = :profileId;
+    `,
+      { profileId: ExperimentAPI.profileId }
+    );
+
+    return result.map(row => row.getResultByName("slug")).sort();
+  }
+
+  const { manager, cleanup } = await NimbusTestUtils.setupTest();
+
+  const experimentRecipe = NimbusTestUtils.factories.recipe("experiment", {
+    branches: [
+      {
+        ratio: 1,
+        slug: "control",
+        features: [
+          {
+            featureId: "no-feature-firefox-desktop",
+            value: {},
+          },
+        ],
+      },
+      {
+        ratio: 0, // Force enrollment in control
+        slug: "treatment",
+        features: [
+          {
+            featureId: "no-feature-firefox-desktop",
+            value: {},
+          },
+        ],
+      },
+    ],
+  });
+
+  const rolloutRecipe = NimbusTestUtils.factories.recipe.withFeatureConfig(
+    "rollout",
+    { branchSlug: "rollout", featureId: "no-feature-firefox-desktop" }
+  );
+
+  Assert.deepEqual(
+    await getEnrollmentSlugs(),
+    [],
+    "There are no database entries"
+  );
+
+  // Enroll in an experiment
+  await manager.enroll(experimentRecipe, "test");
+  Assert.deepEqual(
+    await getEnrollmentSlugs(),
+    [experimentRecipe.slug],
+    "There is one enrollment"
+  );
+
+  let experimentEnrollment = await getEnrollment(experimentRecipe.slug);
+  Assert.ok(experimentEnrollment.active, "experiment enrollment is active");
+  Assert.deepEqual(
+    experimentEnrollment.recipe,
+    experimentRecipe,
+    "experiment enrollment has the correct recipe"
+  );
+  Assert.equal(
+    experimentEnrollment.branchSlug,
+    manager.store.get(experimentRecipe.slug).branch.slug,
+    "experiment branch slug matches"
+  );
+
+  // Enroll in a rollout.
+  await manager.enroll(rolloutRecipe, "test");
+  Assert.deepEqual(
+    await getEnrollmentSlugs(),
+    [experimentRecipe.slug, rolloutRecipe.slug].sort(),
+    "There are two enrollments"
+  );
+
+  let rolloutEnrollment = await getEnrollment(rolloutRecipe.slug);
+  Assert.ok(rolloutEnrollment.active, "rollout enrollment is active");
+  Assert.deepEqual(
+    rolloutEnrollment.recipe,
+    rolloutRecipe,
+    "rollout enrollment has the correct recipe"
+  );
+  Assert.equal(
+    rolloutEnrollment.branchSlug,
+    manager.store.get(rolloutRecipe.slug).branch.slug,
+    "rollout branch slug matches"
+  );
+
+  // Unenroll from the rollout.
+  await manager.unenroll(rolloutRecipe.slug, { reason: "recipe-not-seen" });
+  Assert.deepEqual(
+    await getEnrollmentSlugs(),
+    [experimentRecipe.slug, rolloutRecipe.slug].sort(),
+    "There are two enrollments"
+  );
+
+  rolloutEnrollment = await getEnrollment(rolloutRecipe.slug);
+  Assert.ok(!rolloutEnrollment.active, "rollout enrollment is inactive");
+  Assert.equal(
+    rolloutEnrollment.recipe,
+    null,
+    "rollout enrollment recipe is null"
+  );
+  Assert.equal(
+    rolloutEnrollment.unenrollReason,
+    "recipe-not-seen",
+    "rollout unenrollReason"
+  );
+  Assert.equal(
+    rolloutEnrollment.branchSlug,
+    manager.store.get(rolloutRecipe.slug).branch.slug,
+    "rollout branch slug matches"
+  );
+
+  // Unenroll from the experiment.
+  await manager.unenroll(experimentEnrollment.slug, { reason: "targeting" });
+
+  experimentEnrollment = await getEnrollment(experimentRecipe.slug);
+  Assert.ok(!experimentEnrollment.active, "experiment enrollment is inactive");
+  Assert.equal(
+    experimentEnrollment.recipe,
+    null,
+    "experiment enrollment recipe is null"
+  );
+  Assert.equal(
+    experimentEnrollment.unenrollReason,
+    "targeting",
+    "experiment unenrollReason"
+  );
+  Assert.equal(
+    experimentEnrollment.branchSlug,
+    manager.store.get(experimentRecipe.slug).branch.slug,
+    "experiment branch slug matches"
+  );
+
+  await cleanup();
+});

toolkit/components/nimbus/test/unit/test_ExperimentManager_prefs.js

@@ -8,8 +8,8 @@ const { PrefUtils } = ChromeUtils.importESModule(
   "resource://normandy/lib/PrefUtils.sys.mjs"
 );
 
-const { TelemetryTestUtils } = ChromeUtils.importESModule(
-  "resource://testing-common/TelemetryTestUtils.sys.mjs"
+const { ProfilesDatastoreService } = ChromeUtils.importESModule(
+  "moz-src:///toolkit/profile/ProfilesDatastoreService.sys.mjs"
 );
 
 function assertIncludes(array, obj, msg) {
@@ -319,7 +319,7 @@ add_task(async function test_enroll_setPref_rolloutsAndExperiments() {
     }
 
     for (const enrollmentKind of unenrollOrder) {
-      cleanupFns[enrollmentKind]();
+      await cleanupFns[enrollmentKind]();
 
       assertExpectedPrefValues(
         pref,
@@ -1712,9 +1712,6 @@ add_task(async function test_prefChange() {
     const cleanupFunctions = {};
     const slugs = {};
 
-    await manager.store.init();
-    await manager.onStartup();
-
     setPrefs(pref, { defaultBranchValue, userBranchValue });
 
     info(`Enrolling in ${Array.from(Object.keys(configs)).join(", ")} ...`);
@@ -1744,6 +1741,10 @@ add_task(async function test_prefChange() {
 
     PrefUtils.setPref(pref, OVERWRITE_VALUE, { branch: setBranch });
 
+    await NimbusTestUtils.waitForActiveEnrollments(
+      expectedEnrollments.map(kind => slugs[kind])
+    );
+
     if (expectedDefault === null) {
       Assert.ok(
         !Services.prefs.prefHasDefaultValue(pref),
@@ -1783,6 +1784,9 @@ add_task(async function test_prefChange() {
     for (const enrollmentKind of Object.keys(configs)) {
       if (!expectedEnrollments.includes(enrollmentKind)) {
         const slug = slugs[enrollmentKind];
+
+        await NimbusTestUtils.waitForInactiveEnrollment(slug);
+
         const enrollment = manager.store.get(slug);
 
         Assert.ok(
@@ -1873,7 +1877,7 @@ add_task(async function test_prefChange() {
     );
 
     for (const enrollmentKind of expectedEnrollments) {
-      cleanupFunctions[enrollmentKind]();
+      await cleanupFunctions[enrollmentKind]();
     }
 
     Services.prefs.deleteBranch(pref);
@@ -2322,7 +2326,7 @@ add_task(async function test_deleteBranch() {
   );
 
   for (const cleanupFn of cleanupFunctions) {
-    cleanupFn();
+    await cleanupFn();
   }
 
   Services.prefs.deleteBranch(PREFS[USER]);
@@ -2405,6 +2409,11 @@ add_task(async function test_clearUserPref() {
 
     for (const enrollmentKind of Object.keys(configs)) {
       const slug = slugs[enrollmentKind];
+
+      if (!expectedEnrolled) {
+        await NimbusTestUtils.waitForInactiveEnrollment(slug);
+      }
+
       const enrollment = manager.store.get(slug);
       Assert.ok(
         enrollment !== null,
@@ -2438,7 +2447,7 @@ add_task(async function test_clearUserPref() {
 
     if (expectedEnrolled) {
       for (const cleanupFn of Object.values(cleanupFns)) {
-        cleanupFn();
+        await cleanupFn();
       }
     }
 
@@ -2676,7 +2685,7 @@ add_task(async function test_prefChanged_noPrefSet() {
               );
             }
 
-            doEnrollmentCleanup();
+            await doEnrollmentCleanup();
             await cleanup();
 
             Services.prefs.deleteBranch(pref);
@@ -3388,7 +3397,7 @@ add_task(async function test_setPref_types() {
 
   Assert.deepEqual(json, jsonPrefValue);
 
-  experimentCleanup();
+  await experimentCleanup();
   featureCleanup();
   await cleanup();
 });
@@ -3481,3 +3490,56 @@ add_task(async function test_setPref_types_restore() {
   await cleanup();
   featureCleanup();
 });
+
+add_task(async function testDb() {
+  const { manager, cleanup } = await setupTest();
+
+  PrefUtils.setPref("nimbus.qa.pref-1", "foo", { branch: DEFAULT });
+
+  await manager.enroll(
+    NimbusTestUtils.factories.recipe.withFeatureConfig("slug", {
+      featureId: "nimbus-qa-1",
+      value: { value: "hello" },
+    }),
+    "test"
+  );
+
+  const conn = await ProfilesDatastoreService.getConnection();
+  const [result] = await conn.execute(
+    `
+      SELECT
+        json(setPrefs) as setPrefs
+      FROM NimbusEnrollments
+      WHERE
+        profileId = :profileId AND
+        slug = :slug;
+    `,
+    {
+      slug: "slug",
+      profileId: ExperimentAPI.profileId,
+    }
+  );
+
+  const setPrefs = JSON.parse(result.getResultByName("setPrefs"));
+  const enrollment = manager.store.get("slug");
+
+  Assert.deepEqual(
+    setPrefs,
+    enrollment.prefs,
+    "setPrefs stored in the database"
+  );
+  Assert.deepEqual(setPrefs, [
+    {
+      name: "nimbus.qa.pref-1",
+      branch: "default",
+      featureId: "nimbus-qa-1",
+      variable: "value",
+      originalValue: "foo",
+    },
+  ]);
+
+  await manager.unenroll("slug");
+  await cleanup();
+
+  Services.prefs.deleteBranch("nimbus.qa.pref-1");
+});

toolkit/components/nimbus/test/unit/test_ExperimentManager_unenroll.js

@@ -60,6 +60,8 @@ add_task(async function test_unenroll_opt_out() {
 
   Services.prefs.setBoolPref(STUDIES_OPT_OUT_PREF, false);
 
+  await NimbusTestUtils.waitForInactiveEnrollment(experiment.slug);
+
   Assert.equal(
     manager.store.get(experiment.slug).active,
     false,
@@ -119,6 +121,8 @@ add_task(async function test_unenroll_rollout_opt_out() {
 
   Services.prefs.setBoolPref(STUDIES_OPT_OUT_PREF, false);
 
+  await NimbusTestUtils.waitForInactiveEnrollment(rollout.slug);
+
   Assert.equal(
     manager.store.get(rollout.slug).active,
     false,
@@ -171,6 +175,8 @@ add_task(async function test_unenroll_uploadPref() {
 
   Services.prefs.setBoolPref(UPLOAD_ENABLED_PREF, false);
 
+  await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
+
   Assert.equal(
     manager.store.get(recipe.slug).active,
     false,

toolkit/components/nimbus/test/unit/test_ExperimentStore.js

@@ -102,7 +102,7 @@ add_task(async function test_initOnUpdateEventsFire() {
     storePath = await NimbusTestUtils.saveStore(store);
   }
 
-  const { sandbox, store, initExperimentAPI, cleanup } = await setupTest({
+  const { sandbox, initExperimentAPI, cleanup } = await setupTest({
     storePath,
     init: false,
   });
@@ -136,13 +136,14 @@ add_task(async function test_initOnUpdateEventsFire() {
 
   NimbusFeatures.testFeature.offUpdate(onFeatureUpdate);
 
-  store.updateExperiment("testFeature-1", { active: false });
-  store.updateExperiment("testFeature-2", { active: false });
-  store.updateExperiment("coenroll-1", { active: false });
-  store.updateExperiment("coenroll-2", { active: false });
-  store.updateExperiment("coenroll-3", { active: false });
-  store.updateExperiment("coenroll-4", { active: false });
-
+  await NimbusTestUtils.cleanupManager([
+    "testFeature-1",
+    "testFeature-2",
+    "coenroll-1",
+    "coenroll-2",
+    "coenroll-3",
+    "coenroll-4",
+  ]);
   await cleanup();
 });
 
@@ -857,8 +858,6 @@ add_task(async function test_restore() {
   Assert.ok(store.get("experiment"));
   Assert.ok(store.get("rollout"));
 
-  store.updateExperiment("experiment", { active: false });
-  store.updateExperiment("rollout", { active: false });
-
+  await NimbusTestUtils.cleanupManager(["experiment", "rollout"]);
   await cleanup();
 });

toolkit/components/nimbus/test/unit/test_Migrations.js

@@ -1,9 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
-/* import-globals-from ../../../../../toolkit/profile/test/xpcshell/head.js */
-/* import-globals-from ../../../../../browser/components/profiles/tests/unit/head.js */
-
 const {
   LABS_MIGRATION_FEATURE_MAP,
   LEGACY_NIMBUS_MIGRATION_PREF,
@@ -47,16 +44,6 @@ function getEnabledPrefForFeature(featureId) {
 
 add_setup(async function setup() {
   Services.fog.initializeFOG();
-
-  Services.prefs.setBoolPref("nimbus.profilesdatastoreservice.enabled", true);
-  registerCleanupFunction(() => {
-    Services.prefs.setBoolPref(
-      "nimbus.profilesdatastoreservice.enabled",
-      false
-    );
-  });
-
-  await initSelectableProfileService();
 });
 
 /**
@@ -97,11 +84,7 @@ async function setupTest({
     );
   }
 
-  const {
-    initExperimentAPI,
-    cleanup: baseCleanup,
-    ...ctx
-  } = await NimbusTestUtils.setupTest({
+  const { initExperimentAPI, ...ctx } = await NimbusTestUtils.setupTest({
     init: false,
     clearTelemetry: true,
     ...args,
@@ -141,13 +124,7 @@ async function setupTest({
     ctx.initExperimentAPI = initExperimentAPI;
   }
 
-  return {
-    ...ctx,
-    async cleanup() {
-      await baseCleanup();
-      Services.prefs.deleteBranch("nimbus.migrations");
-    },
-  };
+  return ctx;
 }
 
 function makeMigrations(phase, count) {

toolkit/components/nimbus/test/unit/test_RemoteSettingsExperimentLoader.js

@@ -204,13 +204,14 @@ add_task(async function test_checkExperimentSelfReference() {
 add_task(async function test_optIn_debug_disabled() {
   info("Testing users cannot opt-in when nimbus.debug is false");
 
-  const recipe = NimbusTestUtils.factories.recipe("foo");
-  const { sandbox, loader, initExperimentAPI, cleanup } =
+  const recipe = NimbusTestUtils.factories.recipe("foo", {
+    targeting: "false",
+  });
+  const { loader, initExperimentAPI, cleanup } =
     await NimbusTestUtils.setupTest({
       init: false,
       experiments: [recipe],
     });
-  sandbox.stub(loader, "updateRecipes").resolves();
 
   await initExperimentAPI();
 
@@ -238,12 +239,12 @@ add_task(async function test_optIn_studies_disabled() {
     "Testing users cannot opt-in when telemetry is disabled or studies are disabled."
   );
 
-  const recipe = NimbusTestUtils.factories.recipe("foo");
-  const { sandbox, loader, initExperimentAPI, cleanup } =
+  const recipe = NimbusTestUtils.factories.recipe("foo", {
+    targeting: "false",
+  });
+  const { loader, initExperimentAPI, cleanup } =
     await NimbusTestUtils.setupTest({ init: false, experiments: [recipe] });
 
-  sandbox.stub(loader, "updateRecipes").resolves();
-
   await initExperimentAPI();
 
   Services.prefs.setBoolPref(DEBUG_PREF, true);

toolkit/components/nimbus/test/unit/test_RemoteSettingsExperimentLoader_updateRecipes.js

@@ -12,9 +12,6 @@ const { PanelTestProvider } = ChromeUtils.importESModule(
 const { TelemetryEnvironment } = ChromeUtils.importESModule(
   "resource://gre/modules/TelemetryEnvironment.sys.mjs"
 );
-const { TelemetryTestUtils } = ChromeUtils.importESModule(
-  "resource://testing-common/TelemetryTestUtils.sys.mjs"
-);
 const { UnenrollmentCause } = ChromeUtils.importESModule(
   "resource://nimbus/lib/ExperimentManager.sys.mjs"
 );
@@ -957,7 +954,7 @@ add_task(async function test_updateRecipes_rollout_bucketing() {
     }
   );
 
-  manager.unenroll(experiment.slug);
+  await manager.unenroll(experiment.slug);
 
   await cleanup();
 });
@@ -1008,7 +1005,7 @@ add_task(async function test_reenroll_rollout_resized() {
     "New enrollment should not have unenroll reason"
   );
 
-  manager.unenroll(rollout.slug);
+  await manager.unenroll(rollout.slug);
 
   await cleanup();
 });
@@ -1025,7 +1022,7 @@ add_task(async function test_experiment_reenroll() {
     "Should enroll in experiment"
   );
 
-  manager.unenroll(experiment.slug);
+  await manager.unenroll(experiment.slug);
   Assert.ok(
     !manager.store.getExperimentForFeature("testFeature"),
     "Should unenroll from experiment"
@@ -1162,8 +1159,8 @@ add_task(async function test_active_and_past_experiment_targeting() {
     ["experiment-a", "experiment-b", "rollout-a", "rollout-b"]
   );
 
-  manager.unenroll("experiment-c");
-  manager.unenroll("rollout-c");
+  await manager.unenroll("experiment-c");
+  await manager.unenroll("rollout-c");
 
   cleanupFeatures();
   await cleanup();
@@ -1329,14 +1326,12 @@ add_task(async function test_enrollment_targeting() {
     []
   );
 
-  for (const slug of [
+  await NimbusTestUtils.cleanupManager([
     "experiment-b",
     "experiment-c",
     "rollout-b",
     "rollout-c",
-  ]) {
-    manager.unenroll(slug);
-  }
+  ]);
 
   cleanupFeatures();
   await cleanup();
@@ -1425,7 +1420,7 @@ add_task(
     const isReadyEvents = Glean.nimbusEvents.isReady.testGetValue("events");
 
     Assert.equal(isReadyEvents.length, 3);
-    manager.unenroll(recipe.slug);
+    await manager.unenroll(recipe.slug);
 
     await cleanup();
   }
@@ -1594,7 +1589,7 @@ add_task(async function test_updateRecipes_optInsStayEnrolled() {
   await loader.updateRecipes();
   Assert.ok(manager.store.get("opt-in")?.active, "Opt-in stayed enrolled");
 
-  manager.unenroll("opt-in");
+  await manager.unenroll("opt-in");
 
   await cleanup();
 });
@@ -1914,8 +1909,8 @@ add_task(async function test_updateRecipes_enrollmentStatus_telemetry() {
     },
   ]);
 
-  manager.unenroll("stays-enrolled");
-  manager.unenroll("enrolls");
+  await manager.unenroll("stays-enrolled");
+  await manager.unenroll("enrolls");
 
   cleanupFeatures();
   await cleanup();
@@ -2027,8 +2022,8 @@ add_task(async function test_updateRecipes_enrollmentStatus_notEnrolled() {
     ]
   );
 
-  manager.unenroll("enrolled-experiment");
-  manager.unenroll("enrolled-rollout");
+  await manager.unenroll("enrolled-experiment");
+  await manager.unenroll("enrolled-rollout");
 
   cleanupFeatures();
   await cleanup();
@@ -2218,8 +2213,8 @@ add_task(async function testUnenrollsFirst() {
   await loader.updateRecipes();
   assertEnrollments(manager.store, ["e3", "r3"], ["e1", "e2", "r1", "r2"]);
 
-  manager.unenroll("e3");
-  manager.unenroll("r3");
+  await manager.unenroll("e3");
+  await manager.unenroll("r3");
 
   await cleanup();
 });

toolkit/components/nimbus/test/unit/test_localization.js

@@ -4,9 +4,6 @@
 const { MatchStatus } = ChromeUtils.importESModule(
   "resource://nimbus/lib/RemoteSettingsExperimentLoader.sys.mjs"
 );
-const { TelemetryTestUtils } = ChromeUtils.importESModule(
-  "resource://testing-common/TelemetryTestUtils.sys.mjs"
-);
 
 const LOCALIZATIONS = {
   "en-US": {
@@ -213,7 +210,7 @@ add_task(async function test_getLocalizedValue() {
     "_getLocalizedValue() with a nested localization"
   );
 
-  doExperimentCleanup();
+  await doExperimentCleanup();
   await cleanup();
 });
 
@@ -247,6 +244,8 @@ add_task(async function test_getLocalizedValue_unenroll_missingEntry() {
     "_getLocalizedValue() with a bogus localization"
   );
 
+  await NimbusTestUtils.waitForInactiveEnrollment(enrollment.slug);
+
   Assert.equal(
     manager.store.getExperimentForFeature(FEATURE_ID),
     null,
@@ -316,6 +315,8 @@ add_task(async function test_getLocalizedValue_unenroll_missingEntry() {
     "_getLocalizedValue() with a bogus localization"
   );
 
+  await NimbusTestUtils.waitForInactiveEnrollment(enrollment.slug);
+
   Assert.equal(
     manager.store.getExperimentForFeature(FEATURE_ID),
     null,
@@ -393,7 +394,7 @@ add_task(async function test_getVariables() {
     "getVariable() returns substitutions inside arrays"
   );
 
-  doExperimentCleanup();
+  await doExperimentCleanup();
   await cleanup();
 });
 
@@ -645,6 +646,9 @@ add_task(async function test_getVariables_fallback_unenroll() {
     waldo: ["fallback-waldo-pref-value"],
   });
 
+  await NimbusTestUtils.waitForInactiveEnrollment("experiment");
+  await NimbusTestUtils.waitForInactiveEnrollment("rollout");
+
   Assert.equal(
     manager.store.getExperimentForFeature(FEATURE_ID),
     null,

toolkit/components/nimbus/test/unit/test_prefFlips.js

@@ -7,8 +7,9 @@ const { PrefUtils } = ChromeUtils.importESModule(
 const { JsonSchema } = ChromeUtils.importESModule(
   "resource://gre/modules/JsonSchema.sys.mjs"
 );
-const { TelemetryTestUtils } = ChromeUtils.importESModule(
-  "resource://testing-common/TelemetryTestUtils.sys.mjs"
+
+const { ProfilesDatastoreService } = ChromeUtils.importESModule(
+  "moz-src:///toolkit/profile/ProfilesDatastoreService.sys.mjs"
 );
 
 const USER = "user";
@@ -145,6 +146,7 @@ async function setupTest({ ...args } = {}) {
     ...ctx,
     async cleanup() {
       assertNoObservers(ctx.manager);
+      await NimbusTestUtils.waitForAllUnenrollments();
       await baseCleanup();
     },
   };
@@ -1606,6 +1608,8 @@ add_task(async function test_prefFlips_unenrollment() {
       Assert.ok(enrollment.active, `It should still be active`);
     }
 
+    await NimbusTestUtils.waitForActiveEnrollments(expectedEnrollments);
+
     info("Checking expected unenrollments...");
     for (const slug of expectedUnenrollments) {
       const enrollment = manager.store.get(slug);
@@ -1614,6 +1618,13 @@ add_task(async function test_prefFlips_unenrollment() {
       Assert.ok(!enrollment.active, "It should no longer be active");
     }
 
+    let expectedCurrentEnrollments = new Set(expectedEnrollments).difference(
+      new Set(expectedUnenrollments)
+    );
+    await NimbusTestUtils.waitForActiveEnrollments(
+      Array.from(expectedCurrentEnrollments)
+    );
+
     if (unenrollmentOrder) {
       info("Unenrolling from specific experiments before checking prefs...");
       for (const slug of unenrollmentOrder ?? []) {
@@ -1621,6 +1632,13 @@ add_task(async function test_prefFlips_unenrollment() {
       }
     }
 
+    expectedCurrentEnrollments = expectedCurrentEnrollments.difference(
+      new Set(unenrollmentOrder)
+    );
+    await NimbusTestUtils.waitForActiveEnrollments(
+      Array.from(expectedCurrentEnrollments)
+    );
+
     if (expectedPrefs) {
       info("Checking expected prefs...");
       checkExpectedPrefs(expectedPrefs);
@@ -1634,6 +1652,8 @@ add_task(async function test_prefFlips_unenrollment() {
       }
     }
 
+    await NimbusTestUtils.waitForActiveEnrollments([]);
+
     info("Cleaning up prefs...");
     Services.prefs.deleteBranch(PREF_FOO);
     Services.prefs.deleteBranch(PREF_BAR);
@@ -2273,6 +2293,15 @@ add_task(async function test_prefFlips_failed() {
   const { manager, cleanup } = await setupTest();
   await manager.enroll(recipe, "test");
 
+  // Unenrolling is triggered by the PrefFlipsFeature in response to the
+  // enrollment being added to the store and triggering the feature update
+  // callback.
+  //
+  // That callback triggers an async unenroll() without awaiting (because it
+  // wouldn't block the ExperimentStore anyway) so we have to wait for the
+  // unenroll to be propagated to the database first.
+  await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
+
   const enrollment = manager.store.get(recipe.slug);
   Assert.ok(!enrollment.active, "Experiment should not be active");
 
@@ -2342,6 +2371,15 @@ add_task(async function test_prefFlips_failed_multiple_prefs() {
 
   await manager.enroll(recipe, "test");
 
+  // Unenrolling is triggered by the PrefFlipsFeature in response to the
+  // enrollment being added to the store and triggering the feature update
+  // callback.
+  //
+  // That callback triggers an async unenroll() without awaiting (because it
+  // wouldn't block the ExperimentStore anyway) so we have to wait for the
+  // unenroll to be propagated to the database first.
+  await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
+
   const enrollment = manager.store.get(recipe.slug);
   Assert.ok(!enrollment.active, "Experiment should not be active");
 
@@ -2470,8 +2508,11 @@ add_task(async function test_prefFlips_failed_experiment_and_rollout_1() {
       Assert.ok(enrollment.active, `The enrollment for ${slug} is active`);
     }
 
+    await NimbusTestUtils.waitForActiveEnrollments(expectedEnrollments);
+
     info("Checking expected unenrollments...");
     for (const slug of expectedUnenrollments) {
+      await NimbusTestUtils.waitForInactiveEnrollment(slug);
       const enrollment = manager.store.get(slug);
       Assert.ok(!enrollment.active, "The enrollment is no longer active.");
     }
@@ -2577,6 +2618,8 @@ add_task(async function test_prefFlips_failed_experiment_and_rollout_2() {
       );
     }
 
+    await NimbusTestUtils.waitForActiveEnrollments(expectedEnrollments);
+
     info("Checking expected enrollments...");
     for (const slug of expectedEnrollments) {
       const enrollment = manager.store.get(slug);
@@ -2585,6 +2628,7 @@ add_task(async function test_prefFlips_failed_experiment_and_rollout_2() {
 
     info("Checking expected unenrollments...");
     for (const slug of expectedUnenrollments) {
+      await NimbusTestUtils.waitForInactiveEnrollment(slug);
       const enrollment = manager.store.get(slug);
       Assert.ok(!enrollment.active, "The enrollment is no longer active.");
     }
@@ -2643,6 +2687,8 @@ add_task(async function test_prefFlips_update_failure() {
     { manager, slug: "experiment" }
   );
 
+  await NimbusTestUtils.waitForActiveEnrollments(["rollout"]);
+
   const rolloutEnrollment = manager.store.get("rollout");
   const experimentEnrollment = manager.store.get("experiment");
 
@@ -2653,7 +2699,7 @@ add_task(async function test_prefFlips_update_failure() {
   Assert.equal(Services.prefs.getStringPref("pref.one"), "one");
   Assert.equal(Services.prefs.getStringPref("pref.two"), "two");
 
-  cleanupExperiment();
+  await cleanupExperiment();
 
   Services.prefs.deleteBranch("pref.one");
   Services.prefs.deleteBranch("pref.two");
@@ -2893,6 +2939,9 @@ add_task(async function test_prefFlips_restore_failure_conflict() {
 
   const { manager, cleanup } = await setupTest({ storePath });
 
+  await NimbusTestUtils.waitForActiveEnrollments(["rollout-1"]);
+  await NimbusTestUtils.waitForInactiveEnrollment("rollout-2");
+
   Assert.ok(manager.store.get("rollout-1").active, "rollout-1 is active");
   Assert.ok(!manager.store.get("rollout-2").active, "rollout-2 is not active");
   Assert.equal(
@@ -2977,7 +3026,12 @@ add_task(async function test_prefFlips_restore_failure_wrong_type() {
 
   Services.prefs.setIntPref(PREF_1, 123);
 
-  const { manager, cleanup } = await setupTest({ storePath });
+  const { manager, cleanup } = await setupTest({
+    storePath,
+    secureExperiments: [recipe],
+  });
+
+  await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
 
   const enrollment = manager.store.get(recipe.slug);
 
@@ -3026,6 +3080,7 @@ add_task(
     PrefUtils.setPref(PREF, "default-value", { branch: DEFAULT });
 
     await manager.enroll(recipe, "rs-loader");
+    await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
 
     let enrollment = manager.store.get(recipe.slug);
 
@@ -3033,6 +3088,8 @@ add_task(
     Assert.equal(enrollment.unenrollReason, "prefFlips-failed");
 
     await manager.enroll(recipe, "rs-loader", { reenroll: true });
+    await NimbusTestUtils.waitForInactiveEnrollment(recipe.slug);
+
     enrollment = manager.store.get(recipe.slug);
 
     Assert.ok(!enrollment.active, "enrollment should not be active");
@@ -3043,3 +3100,59 @@ add_task(
     await cleanup();
   }
 );
+
+add_task(async function testDb() {
+  const { manager, cleanup } = await setupTest();
+
+  PrefUtils.setPref("foo.bar.baz", "foo");
+
+  await manager.enroll(
+    NimbusTestUtils.factories.recipe.withFeatureConfig("slug", {
+      featureId: "prefFlips",
+      value: {
+        prefs: {
+          "foo.bar.baz": {
+            value: "bar",
+            branch: "user",
+          },
+        },
+      },
+    }),
+    "test"
+  );
+
+  const conn = await ProfilesDatastoreService.getConnection();
+  const [result] = await conn.execute(
+    `
+      SELECT
+        json(prefFlips) as prefFlips
+      FROM NimbusEnrollments
+      WHERE
+        profileId = :profileId AND
+        slug = :slug;
+    `,
+    {
+      slug: "slug",
+      profileId: ExperimentAPI.profileId,
+    }
+  );
+
+  const prefFlips = JSON.parse(result.getResultByName("prefFlips"));
+  const enrollment = manager.store.get("slug");
+
+  Assert.deepEqual(
+    prefFlips,
+    enrollment.prefFlips,
+    "prefFlips stored in the database"
+  );
+  Assert.deepEqual(prefFlips, {
+    originalValues: {
+      "foo.bar.baz": "foo",
+    },
+  });
+
+  await manager.unenroll("slug");
+  await cleanup();
+
+  Services.prefs.deleteBranch("foo.bar.baz");
+});

toolkit/components/nimbus/test/unit/xpcshell.toml

@@ -1,5 +1,5 @@
 [DEFAULT]
-head = "head.js"
+head = "../../../../../toolkit/profile/test/xpcshell/head.js ../../../../../browser/components/profiles/tests/unit/head.js head.js"
 tags = "nimbus"
 firefox-appdir = "browser"
 support-files = ["reference_aboutwelcome_experiment_content.json"]
@@ -39,7 +39,6 @@ run-sequentially = "very high failure rate in parallel"
 ["test_FirefoxLabs.js"]
 
 ["test_Migrations.js"]
-head = "../../../../../toolkit/profile/test/xpcshell/head.js ../../../../../browser/components/profiles/tests/unit/head.js head.js"
 
 ["test_NimbusTestUtils.js"]