feat: Added support for @langchain/aws

[amychisholm03]

Description

Adds tests for the @langchain/aws package, specifically testing the classes related to AWS Bedrock: ChatBedrockConverse and BedrockEmbeddings.

Fixes a bug where we were not properly handing AWS Bedrock streams when it was piped from another source and where the stream chunk type may differ.

How to Test

npm run versioned:major langchain
# to make sure we didn't break normal AWS Bedrock use
npm run versioned:major aws-sdk-v3

Related Issues

Closes #3489

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.68%. Comparing base (e7bcff4) to head (ec14dc7).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3563       +/-   ##
===========================================
+ Coverage   81.30%   97.68%   +16.38%     
===========================================
  Files         420      434       +14     
  Lines       55460    56838     +1378     
  Branches        1        1               
===========================================
+ Hits        45090    55524    +10434     
+ Misses      10370     1314     -9056     

Flag	Coverage Δ
integration-tests-cjs-20.x	73.58% <0.00%> (?)
integration-tests-cjs-22.x	73.62% <0.00%> (?)
integration-tests-cjs-24.x	74.35% <0.00%> (?)
integration-tests-esm-20.x	52.55% <0.00%> (?)
integration-tests-esm-22.x	52.60% <0.00%> (?)
integration-tests-esm-24.x	53.76% <0.00%> (?)
unit-tests-20.x	88.58% <0.00%> (?)
unit-tests-22.x	88.61% <0.00%> (?)
unit-tests-24.x	88.62% <0.00%> (?)
versioned-tests-20.x	80.99% <100.00%> (-0.31%)	⬇️
versioned-tests-22.x	80.99% <100.00%> (?)
versioned-tests-24.x	80.93% <100.00%> (?)

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[bizob2828]

haven't reviewed it all but this approach needs updated

[bizob2828]

tests are still failing for me:

stderr
node:fs:560
  return binding.open(
                 ^

Error: ENOENT: no such file or directory, open '../../langchain/node_modules/@aws-sdk/client-bedrock-runtime/package.json'
    at Object.openSync (node:fs:560:18)
    at Object.readFileSync (node:fs:444:35)
    at getAiResponseServer (/Users/revans/code/release/node-newrelic/test/versioned/aws-sdk-v3/common.js:206:8)
    at Object.<anonymous> (/Users/revans/code/release/node-newrelic/test/versioned/langchain/bedrock/runnables.test.js:30:32)
    at Module._compile (node:internal/modules/cjs/loader:1760:14)
    at Object..js (node:internal/modules/cjs/loader:1893:10)
    at Module.load (node:internal/modules/cjs/loader:1480:32)
    at Module._load (node:internal/modules/cjs/loader:1299:12)
    at TracingChannel.traceSync (node:diagnostics_channel:328:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:244:24) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '../../langchain/node_modules/@aws-sdk/client-bedrock-runtime/package.json'
}

you cannot pass in

[bizob2828]

LGTM

[bizob2828]

very close. the 2 runnables tests needs to templatize the prompt and pass in valid template when calling invoke or stream. also a todo is still there with invalid assertion description

[bizob2828]

good work on getting these tests in here and fixing our instrumentation to handle findings