Fixes ImmutableList case and adds test

Author: romellem

packages/expect-utils/src/__tests__/utils.test.ts

@@ -6,6 +6,7 @@
  *
  */
 
+import {List} from 'immutable';
 import {stringify} from 'jest-matcher-utils';
 import {
   arrayBufferEquality,
@@ -517,6 +518,13 @@ describe('iterableEquality', () => {
 
     expect(iterableEquality(a, b)).toBe(true);
   });
+
+  test('returns true when given Immutable Lists without an OwnerID', () => {
+    const a = List([1, 2, 3]);
+    const b = a.filter(v => v > 0);
+
+    expect(iterableEquality(a, b)).toBe(true);
+  });
 });
 
 describe('arrayBufferEquality', () => {

packages/expect-utils/src/utils.ts

@@ -181,11 +181,7 @@ export const iterableEquality = (
   if (a.size !== undefined) {
     if (a.size !== b.size) {
       return false;
-    } else if (
-      isA('Set', a) ||
-      isImmutableUnorderedSet(a) ||
-      isImmutableList(a)
-    ) {
+    } else if (isA('Set', a) || isImmutableUnorderedSet(a)) {
       let allFound = true;
       for (const aValue of a) {
         if (!b.has(aValue)) {
@@ -259,6 +255,11 @@ export const iterableEquality = (
     return false;
   }
 
+  if (isImmutableList(a)) {
+    // After iteration, Immutable Lists are equal
+    return true;
+  }
+
   const aEntries = Object.entries(a);
   const bEntries = Object.entries(b);
   if (!equals(aEntries, bEntries)) {