HttpBackendMock expectation fails for Uint8Array response

[gefilte]

This was broken starting in 1.2.27. The offending commit was 1426b02

-    if (data && !angular.isString(data)) return angular.equals(data, angular.fromJson(d));
+    if (data && !angular.isString(data)) {
+      return angular.equals(angular.fromJson(angular.toJson(data)), angular.fromJson(d));
+    }

My tests and my service use the same function to convert a payload into a U8IntArray:

function strToBinaryArray(str) {
  // This is the evil incantation to convert our string into a binary data array suitable for XHR.send()
  return new Uint8Array(
    Array.prototype.map.call(str, function byteValue(x) {
      return x.charCodeAt(0) & 0xff;
    }));
}

Now when I run my expectation with the expected payload washed through this function, I get this:

ERROR [karma]: Error: Expected POST adb-manager/adbs with different data
EXPECTED:     {"0":13,"1":10,"2":45, <CUT FOR BREVITY>,"length":434,"byteOffset":0,"buffer":{"byteLength":434},"byteLength":434}
GOT:      [object Uint8Array]
at http://localhost:9018/base/vendor/angular-mocks/angular-mocks.js?eb7eef4597d027fb2bbdc81cfbea2a5906c2e0e7:1150

If I revert the change from 1426b02 my spec passes.

This seems like a bug.

[pkozlowski-opensource]

Yes, this sounds like a valid bug.

[gefilte]

The workaround for this is to have the expectation be a function that returns the binary data. The fact that this workaround works suggests that the intended fix (for Date objects) will not suffice in the case of a function expectation.

[petebacondarwin]

Is this still a problem in 1.4.x?
If so then it seems to me that the problem is with the angular.toJson() method, which is not encoding the Uint8Array correctly. Is that right?