From ebd2795e3a25ba0c6b5d5e919e21fa0bfd057c2e Mon Sep 17 00:00:00 2001
From: Matt Parrish <matt.parrish@gusto.com>
Date: Wed, 29 Jun 2022 16:30:38 -0600
Subject: [PATCH 1/2] fix(expect-utils): Fix equalityof ImmutableJS OrderedSets

---
 packages/expect-utils/src/__tests__/utils.test.ts | 8 +++++++-
 packages/expect-utils/src/jasmineUtils.ts         | 9 +++++++++
 packages/expect-utils/src/utils.ts                | 7 ++++++-
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/packages/expect-utils/src/__tests__/utils.test.ts b/packages/expect-utils/src/__tests__/utils.test.ts
index e94c72e5c191..f47aec654384 100644
--- a/packages/expect-utils/src/__tests__/utils.test.ts
+++ b/packages/expect-utils/src/__tests__/utils.test.ts
@@ -6,7 +6,7 @@
  *
  */
 
-import {List, OrderedMap} from 'immutable';
+import {List, OrderedMap, OrderedSet} from 'immutable';
 import {stringify} from 'jest-matcher-utils';
 import {
   arrayBufferEquality,
@@ -531,6 +531,12 @@ describe('iterableEquality', () => {
     const b = OrderedMap().merge({saving: true});
     expect(iterableEquality(a, b)).toBe(true);
   });
+
+  test('returns true when given Immutable OrderedSets without an OwnerID', () => {
+    const a = OrderedSet().add('newValue');
+    const b = List(['newValue']).toOrderedSet();
+    expect(iterableEquality(a, b)).toBe(true);
+  });
 });
 
 describe('arrayBufferEquality', () => {
diff --git a/packages/expect-utils/src/jasmineUtils.ts b/packages/expect-utils/src/jasmineUtils.ts
index 6b003ed89569..16b0253a4f32 100644
--- a/packages/expect-utils/src/jasmineUtils.ts
+++ b/packages/expect-utils/src/jasmineUtils.ts
@@ -274,3 +274,12 @@ export function isImmutableOrderedKeyed(maybeKeyed: any) {
     maybeKeyed[IS_ORDERED_SENTINEL]
   );
 }
+
+
+export function isImmutableOrderedSet(maybeSet: any) {
+  return !!(
+    maybeSet &&
+    maybeSet[IS_SET_SENTINEL] &&
+    maybeSet[IS_ORDERED_SENTINEL]
+  );
+}
diff --git a/packages/expect-utils/src/utils.ts b/packages/expect-utils/src/utils.ts
index 684a184a6370..e4605426ae70 100644
--- a/packages/expect-utils/src/utils.ts
+++ b/packages/expect-utils/src/utils.ts
@@ -12,6 +12,7 @@ import {
   isA,
   isImmutableList,
   isImmutableOrderedKeyed,
+  isImmutableOrderedSet,
   isImmutableUnorderedKeyed,
   isImmutableUnorderedSet,
 } from './jasmineUtils';
@@ -256,7 +257,11 @@ export const iterableEquality = (
     return false;
   }
 
-  if (!isImmutableList(a) && !isImmutableOrderedKeyed(a)) {
+  if (
+    !isImmutableList(a) &&
+    !isImmutableOrderedKeyed(a) &&
+    !isImmutableOrderedSet(a)
+  ) {
     const aEntries = Object.entries(a);
     const bEntries = Object.entries(b);
     if (!equals(aEntries, bEntries)) {

From 5c3ebbe79f0be99c8fca0f418220c2b5e9c0023b Mon Sep 17 00:00:00 2001
From: Matt Parrish <matt.parrish@gusto.com>
Date: Wed, 29 Jun 2022 16:34:14 -0600
Subject: [PATCH 2/2] Add changelog entry

---
 CHANGELOG.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85a901a4810c..f5e306f654f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### Fixes
 
+- `[@jest/expect-utils]` Fix deep equality of ImmutableJS OrderedSets ([#12977](https://github.com/facebook/jest/pull/12977))
+
 ### Chore & Maintenance
 
 ### Performance