How can I test google.protobuf.Timestamp in Javascript?

Question

Using a proto file from an API created in Scala. My code is in JS, trying to test my code and getting the following error:

AssertionError [ERR_ASSERTION]: invalid return value: post[0].lastPublishedDate: Date expected

Tried and didn't work:

1. lastPublishedDate: {seconds: <date>, nano: <date>}, with date being a date's toISOString() like mentioned in the docs (https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/timestamp.proto#L115)
2. lastPublishedDate: new Date().toISOString()
3. Just putting 2019-02-18T14:18:45.346Z (that's what the API seems to return when I call it) as the date.

Nothing seems to work for me.

The only other reference to this I could find online is this: https://github.com/dcodeIO/protobuf.js/issues/437 and it also seems unsolved.

Has anyone managed to work with google.protobuf.Timestamp in JS?

Sangsanger

Answer 1

you can use this function to generate Date based on this google/protobuf/timestamp.proto

const getDate = ()=>{
    if (window.proto) {
        const proto = window.proto;
        const timeMS = Date.now();
        const timestamp = new proto.google.protobuf.Timestamp()
        timestamp.setSeconds(timeMS / 1000);
        timestamp.setNanos((timeMS % 1000) * 1e6);
        return timestamp;
    }
}

OR you can use this one as well:

const date = new proto.google.protobuf.Timestamp()
date.fromDate(new Date())

and for getting JS date you can use toDate() method from proto.google.protobuf.Timestamp

hope it helps you.

Murat

setSeconds and setNanos didn't work for me for some reason, but the fromDate did. Thanks! – Underquote

Same with me and this answer saved my day. Huge thank you! – Rathskeller

Thank you - wow this is janky syntax. WTF google!??! – Metamorphose

Answer 2

So apparently it was a regular JS date (new Date()), like could be figured out from the error message...

Sangsanger