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CHANGELOG.md

@@ -1,10 +1,31 @@
 ## vNext (TBD)
 
 ### Deprecations
-* None
+* The callback for `realm.syncSession.addProgressNotification` will only take a single argument in the future: `estimate` (which supports both partition based and flexible sync). The old callback functionality is deprecated and will be removed. The estimate is roughly equivalent to an estimated value of `transferred / transferable` in the deprecated partition-based sync callback. ([#6256](https://github.com/realm/realm-js/issues/6256))  
+```ts
+/** New callback which supports both flexible and partition-based sync */
+realm.syncSession.addProgressNotification(
+  Realm.ProgressDirection.Upload,
+  ProgressMode.ReportIndefinitely,
+  (estimate) => console.log(`progress estimate: ${estimate}/1.0`),
+);
+/** @deprecated */
+realm.syncSession.addProgressNotification(
+  Realm.ProgressDirection.Upload,
+  ProgressMode.ReportIndefinitely,
+  (transferred, transferable) => console.log(`progress: ${(transferred / transferable)}/1.0`),
+);
+```
 
 ### Enhancements
-* None
+* Added progress notifications support for flexible sync using a new callback argument. ([#6256](https://github.com/realm/realm-js/issues/6256))
+```ts
+realm.syncSession.addProgressNotification(
+  Realm.ProgressDirection.Upload,
+  ProgressMode.ReportIndefinitely,
+  (estimate) => console.log(`progress: ${estimate}/1.0`)
+);
+```
 
 ### Fixed
 * <How to hit and notice issue? what was the impact?> ([#????](https://github.com/realm/realm-js/issues/????), since v?.?.?)

integration-tests/tests/package.json

@@ -84,6 +84,9 @@
     "@types/chai-as-promised": "^7.1.5",
     "@types/jsrsasign": "^10.5.4",
     "@types/mocha": "^10.0.0",
+    "@types/sinon": "9.0.5",
+    "@types/sinon-chai": "3.2.12",
+    "assert": "^2.1.0",
     "mocha": "^10.1.0",
     "nyc": "^15.1.0",
     "platform": "^1.3.6",
@@ -94,7 +97,9 @@
     "chai": "4.3.6",
     "chai-as-promised": "^7.1.1",
     "jsrsasign": "^11.0.0",
-    "node-fetch": "^3.3.2"
+    "node-fetch": "^3.3.2",
+    "sinon": "9.2.4",
+    "sinon-chai": "3.7.0"
   },
   "files": [
     "/src"

integration-tests/tests/src/setup-globals.ts

@@ -39,6 +39,9 @@ import chai from "chai";
 // See https://stackoverflow.com/a/45882252
 chai.config.truncateThreshold = 0;
 
+import sinonChai from "sinon-chai";
+chai.use(sinonChai);
+
 import chaiAsPromised from "chai-as-promised";
 chai.use(chaiAsPromised);