test(exporter-logs-otlp-grpc): improve error reporting in particular test failure

[trentm]

Exporter tests are currently failing with the very recent Node.js 22.7.0. We believe the failures are due to a Node 22.x regression for which there is an issue/PR/discussion.
This PR is about improving the test failure to be more helpful.

Before this change the test failure output was:

% cd experimental/packages/exporter-logs-otlp-grpc
% npm test
...
  1) OTLPLogExporter - node with TLS, without metadata, target https://localhost:1503
       "before all" hook for "test certs are valid":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/trentm/tm/opentelemetry-js4/experimental/packages/exporter-logs-otlp-grpc/test/OTLPLogExporter.test.ts)
      at listOnTimeout (node:internal/timers:594:17)
      at processTimers (node:internal/timers:529:7)

  2) OTLPLogExporter - node without TLS, without metadata, target https://localhost:1503
       "before all" hook in "OTLPLogExporter - node without TLS, without metadata, target https://localhost:1503":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/trentm/tm/opentelemetry-js4/experimental/packages/exporter-logs-otlp-grpc/test/OTLPLogExporter.test.ts)
      at listOnTimeout (node:internal/timers:594:17)
      at processTimers (node:internal/timers:529:7)

  3) OTLPLogExporter - node without TLS, with metadata, target https://localhost:1503
       "before all" hook in "OTLPLogExporter - node without TLS, with metadata, target https://localhost:1503":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/trentm/tm/opentelemetry-js4/experimental/packages/exporter-logs-otlp-grpc/test/OTLPLogExporter.test.ts)
      at listOnTimeout (node:internal/timers:594:17)
      at processTimers (node:internal/timers:529:7)

  4) OTLPLogExporter - node without TLS, without metadata, target unix:///tmp/otlp-logs.sock
       "before all" hook in "OTLPLogExporter - node without TLS, without metadata, target unix:///tmp/otlp-logs.sock":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/trentm/tm/opentelemetry-js4/experimental/packages/exporter-logs-otlp-grpc/test/OTLPLogExporter.test.ts)
      at listOnTimeout (node:internal/timers:594:17)
      at processTimers (node:internal/timers:529:7)

After:

...
  1) OTLPLogExporter - node with TLS, without metadata, target https://localhost:1503
       "before all" hook for "test certs are valid":
     RangeError: "length" is outside of buffer bounds
      at Buffer.proto.utf8Write (node:internal/buffer:1066:13)
      at Op.writeStringBuffer [as fn] (/Users/trentm/tm/opentelemetry-js4/node_modules/protobufjs/src/writer_buffer.js:61:13)
      at BufferWriter.finish (/Users/trentm/tm/opentelemetry-js4/node_modules/protobufjs/src/writer.js:453:14)
      at /Users/trentm/tm/opentelemetry-js4/node_modules/@grpc/proto-loader/src/index.ts:382:62
      at Array.map (<anonymous>)
      at createPackageDefinition (/Users/trentm/tm/opentelemetry-js4/node_modules/@grpc/proto-loader/src/index.ts:381:47)
      at /Users/trentm/tm/opentelemetry-js4/node_modules/@grpc/proto-loader/src/index.ts:434:12

  2) OTLPLogExporter - node without TLS, without metadata, target https://localhost:1503
       "before all" hook in "OTLPLogExporter - node without TLS, without metadata, target https://localhost:1503":
     RangeError: "length" is outside of buffer bounds
      at Buffer.proto.utf8Write (node:internal/buffer:1066:13)
      at Op.writeStringBuffer [as fn] (/Users/trentm/tm/opentelemetry-js4/node_modules/protobufjs/src/writer_buffer.js:61:13)
...

I.e. the underlying error is no longer masked.

[trentm]

This could likely also be done for the other exporter tests, assuming they have the same boilerplate setting up some of the test cases.

[waitingsong]

cause of protobufjs : protobufjs/protobuf.js#2025

[pichlermarc]

thanks 👍

[pichlermarc]

This could likely also be done for the other exporter tests, assuming they have the same boilerplate setting up some of the test cases.

Yes, I'm going though quite a few of them during the exporter rewrite and I'm switching them over one by one. There are quite a few of these instances spread all across the repo (not only the exporters).