assert: partialDeepStrictEqual now handles comparisons of ArrayBuffers, SharedArrayBuffers and Int16Arrays

Fixes: #56097

Author: puskin

lib/assert.js

@@ -50,6 +50,7 @@ const {
   StringPrototypeSlice,
   StringPrototypeSplit,
   SymbolIterator,
+  Uint8Array,
 } = primordials;
 
 const {
@@ -73,6 +74,9 @@ const {
   isDate,
   isWeakSet,
   isWeakMap,
+  isSharedArrayBuffer,
+  isArrayBuffer,
+  isInt16Array,
 } = require('internal/util/types');
 const { isError, deprecate, emitExperimentalWarning } = require('internal/util');
 const { innerOk } = require('internal/assert/utils');
@@ -369,7 +373,7 @@ function isSpecial(obj) {
 }
 
 const typesToCallDeepStrictEqualWith = [
-  isKeyObject, isWeakSet, isWeakMap, Buffer.isBuffer,
+  isKeyObject, isWeakSet, isWeakMap, Buffer.isBuffer, isSharedArrayBuffer, isInt16Array,
 ];
 
 /**
@@ -406,6 +410,22 @@ function compareBranch(
     return true;
   }
 
+  if (isArrayBuffer(actual) && isArrayBuffer(expected)) {
+    if (actual.byteLength !== expected.byteLength) {
+      return false;
+    }
+
+    const actualView = new Uint8Array(actual);
+    const expectedView = new Uint8Array(expected);
+
+    for (let i = 0; i < actualView.length; i++) {
+      if (actualView[i] !== expectedView[i]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   for (const type of typesToCallDeepStrictEqualWith) {
     if (type(actual) || type(expected)) {
       if (isDeepStrictEqual === undefined) lazyLoadComparison();

test/parallel/test-assert-objects.js

@@ -207,6 +207,16 @@ describe('Object Comparison Tests', () => {
           actual: [1, 2, 3],
           expected: ['2'],
         },
+        {
+          description: 'throws when comparing a ArrayBuffer with a SharedArrayBuffer',
+          actual: new ArrayBuffer(3),
+          expected: new SharedArrayBuffer(3),
+        },
+        {
+          description: 'throws when comparing an Int16Array with a Uint16Array',
+          actual: new Int16Array(3),
+          expected: new Uint16Array(3),
+        },
       ];
 
       if (common.hasCrypto) {
@@ -347,6 +357,11 @@ describe('Object Comparison Tests', () => {
         actual: { typedArray: new Uint8Array([1, 2, 3]) },
         expected: { typedArray: new Uint8Array([1, 2, 3]) },
       },
+      {
+        description: 'compares two objects with TypedArray instances with the same content',
+        actual: { typedArray: new Int16Array([1, 2, 3]) },
+        expected: { typedArray: new Int16Array([1, 2, 3]) },
+      },
       {
         description: 'compares two Map objects with identical entries',
         actual: new Map([

test/parallel/test-assert-typedarray-deepequal.js

@@ -99,6 +99,10 @@ suite('notEqualArrayPairs', () => {
         makeBlock(assert.deepStrictEqual, arrayPair[0], arrayPair[1]),
         assert.AssertionError
       );
+      assert.throws(
+        makeBlock(assert.partialDeepStrictEqual, arrayPair[0], arrayPair[1]),
+        assert.AssertionError
+      );
     });
   }
 });