1 files changed, 124 insertions, 0 deletions
diff --git a/browser/components/migration/tests/unit/head_migration.js b/browser/components/migration/tests/unit/head_migration.js
new file mode 100644
index 0000000000..ab1f34e419
--- /dev/null
+++ b/browser/components/migration/tests/unit/head_migration.js
@@ -0,0 +1,124 @@
+"use strict";
+
+var { MigrationUtils } = ChromeUtils.importESModule(
+  "resource:///modules/MigrationUtils.sys.mjs"
+);
+var { LoginHelper } = ChromeUtils.import(
+  "resource://gre/modules/LoginHelper.jsm"
+);
+var { NetUtil } = ChromeUtils.import("resource://gre/modules/NetUtil.jsm");
+var { PlacesUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/PlacesUtils.sys.mjs"
+);
+var { Preferences } = ChromeUtils.importESModule(
+  "resource://gre/modules/Preferences.sys.mjs"
+);
+var { PromiseUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/PromiseUtils.sys.mjs"
+);
+var { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+var { TestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TestUtils.sys.mjs"
+);
+var { PlacesTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/PlacesTestUtils.sys.mjs"
+);
+
+ChromeUtils.defineESModuleGetters(this, {
+  FileUtils: "resource://gre/modules/FileUtils.sys.mjs",
+  Sqlite: "resource://gre/modules/Sqlite.sys.mjs",
+});
+
+// Initialize profile.
+var gProfD = do_get_profile();
+
+var { getAppInfo, newAppInfo, updateAppInfo } = ChromeUtils.importESModule(
+  "resource://testing-common/AppInfo.sys.mjs"
+);
+updateAppInfo();
+
+/**
+ * Migrates the requested resource and waits for the migration to be complete.
+ *
+ * @param {MigratorBase} migrator
+ *   The migrator being used to migrate the data.
+ * @param {number} resourceType
+ *   This is a bitfield with bits from nsIBrowserProfileMigrator flipped to indicate what
+ *   resources should be migrated.
+ * @param {object|string|null} [aProfile=null]
+ *   The profile to be migrated. If set to null, the default profile will be
+ *   migrated.
+ * @param {boolean} succeeds
+ *   True if this migration is expected to succeed.
+ * @returns {Promise<Array<string[]>>}
+ *   An array of the results from each nsIObserver topics being observed to
+ *   verify if the migration succeeded or failed. Those results are 2-element
+ *   arrays of [subject, data].
+ */
+async function promiseMigration(
+  migrator,
+  resourceType,
+  aProfile = null,
+  succeeds = null
+) {
+  // Ensure resource migration is available.
+  let availableSources = await migrator.getMigrateData(aProfile);
+  Assert.ok(
+    (availableSources & resourceType) > 0,
+    "Resource supported by migrator"
+  );
+  let promises = [TestUtils.topicObserved("Migration:Ended")];
+
+  if (succeeds !== null) {
+    // Check that the specific resource type succeeded
+    promises.push(
+      TestUtils.topicObserved(
+        succeeds ? "Migration:ItemAfterMigrate" : "Migration:ItemError",
+        (_, data) => data == resourceType
+      )
+    );
+  }
+
+  // Start the migration.
+  migrator.migrate(resourceType, null, aProfile);
+
+  return Promise.all(promises);
+}
+
+/**
+ * Replaces a directory service entry with a given nsIFile.
+ *
+ * @param {string} key
+ *   The nsIDirectoryService directory key to register a fake path for.
+ *   For example: "AppData", "ULibDir".
+ * @param {nsIFile} file
+ *   The nsIFile to map the key to. Note that this nsIFile should represent
+ *   a directory and not an individual file.
+ * @see nsDirectoryServiceDefs.h for the list of directories that can be
+ *   overridden.
+ */
+function registerFakePath(key, file) {
+  let dirsvc = Services.dirsvc.QueryInterface(Ci.nsIProperties);
+  let originalFile;
+  try {
+    // If a file is already provided save it and undefine, otherwise set will
+    // throw for persistent entries (ones that are cached).
+    originalFile = dirsvc.get(key, Ci.nsIFile);
+    dirsvc.undefine(key);
+  } catch (e) {
+    // dirsvc.get will throw if nothing provides for the key and dirsvc.undefine
+    // will throw if it's not a persistent entry, in either case we don't want
+    // to set the original file in cleanup.
+    originalFile = undefined;
+  }
+
+  dirsvc.set(key, file);
+  registerCleanupFunction(() => {
+    dirsvc.undefine(key);
+    if (originalFile) {
+      dirsvc.set(key, originalFile);
+    }
+  });
+}