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feat: add harness testing
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‎.github/workflows/dockerized-test.yml‎

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name: dockerized-test
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permissions:
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contents: read
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on:
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push:
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branches: [nodejs24.x]
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pull_request:
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branches: ['*']
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workflow_dispatch:
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jobs:
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dockerized-test:
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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node_version: ['22', '24']
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steps:
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- uses: actions/checkout@v5
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- name: Set up Node.js
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uses: actions/setup-node@v4
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with:
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node-version: ${{ matrix.node_version }}
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cache: npm
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- name: Install dependencies
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run: npm ci --ignore-scripts
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- name: Build the RIC tarball
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# Produces build-artifacts/aws-lambda-ric-<version>.tgz, which
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# Dockerfile.test unpacks into /var/runtime in the test image.
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run: npm run build:container
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- name: Build the test image
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run: |
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docker build . \
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-t local/test \
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-f Dockerfile.test \
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--build-arg BASE_IMAGE=public.ecr.aws/lambda/nodejs:${{ matrix.node_version }}
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- name: Run dockerized suites
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uses: aws/containerized-test-runner-for-aws-lambda@511d270614f2c6b1613848db6dcf920a591c3c89 # main
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with:
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suiteFileArray: '["./test/dockerized/suites/*.json"]'
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dockerImageName: 'local/test'
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taskFolder: './test/dockerized/tasks'

‎Dockerfile.test‎

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# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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# SPDX-License-Identifier: Apache-2.0
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ARG BASE_IMAGE=public.ecr.aws/lambda/nodejs:24
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FROM $BASE_IMAGE
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# Swap the RIC shipped in the base image for the one we just built.
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ADD build-artifacts/aws-lambda-ric-*.tgz /tmp/
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RUN mv /tmp/package/* /var/runtime/ && rm -rf /tmp/package
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COPY test/dockerized/tasks /var/task/

‎test/dockerized/suites/ctx.json‎

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{
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"tests": [
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{
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"name": "client_context_is_echoed_when_no_w3c_key",
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"handler": "w3c.echoClientContext",
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"request": {},
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"clientContext": {
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"custom": { "value": "hello" },
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"environment": { "stage": "beta" }
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},
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"assertions": [
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{
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"response": {
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"custom": { "value": "hello" },
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"environment": { "stage": "beta" }
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}
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}
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]
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},
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{
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"name": "client_context_is_null_when_header_absent",
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"handler": "w3c.echoClientContext",
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"request": {},
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"assertions": [
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{ "response": null }
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]
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}
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]
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}

‎test/dockerized/suites/w3c.json‎

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{
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"tests": [
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{
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"name": "w3c_is_a_function_on_context",
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"handler": "w3c.w3cIsFunction",
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"request": {},
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"assertions": [
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{ "response": { "isFunction": true } }
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]
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},
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{
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"name": "w3c_returns_empty_when_no_client_context_header",
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"handler": "w3c.getW3c",
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"request": {},
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"assertions": [
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{ "response": {} }
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]
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},
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{
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"name": "w3c_returns_empty_when_client_context_has_no_w3c_key",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"custom": { "value": "test" }
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},
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"assertions": [
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{ "response": {} }
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]
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},
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{
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"name": "w3c_returns_baggage_only",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": { "baggage": "userId=alice" }
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},
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"assertions": [
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{ "response": { "baggage": "userId=alice" } }
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]
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},
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{
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"name": "w3c_returns_all_three_allowlisted_fields",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": {
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"traceparent": "00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01",
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"tracestate": "rojo=00f067aa0ba902b7",
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"baggage": "userId=alice"
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}
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},
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"assertions": [
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{
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"response": {
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"traceparent": "00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01",
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"tracestate": "rojo=00f067aa0ba902b7",
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"baggage": "userId=alice"
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}
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}
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]
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},
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{
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"name": "w3c_allowlist_drops_non_allowlisted_keys",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": {
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"baggage": "keep=me",
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"unknownField": "should-not-appear",
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"x-custom-trace": "should-not-appear"
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}
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},
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"assertions": [
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{ "response": { "baggage": "keep=me" } }
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]
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},
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{
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"name": "w3c_drops_allowlisted_fields_with_non_string_values",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": {
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"traceparent": 42,
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"tracestate": null,
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"baggage": { "nested": "no" }
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}
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},
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"assertions": [
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{ "response": {} }
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]
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},
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{
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"name": "w3c_treats_non_object_as_empty",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": "not-an-object"
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},
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"assertions": [
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{ "response": {} }
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]
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},
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{
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"name": "w3c_treats_array_as_empty",
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"handler": "w3c.getW3c",
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"request": {},
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"clientContext": {
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"w3c": ["baggage=abc"]
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},
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"assertions": [
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{ "response": {} }
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]
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},
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{
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"name": "w3c_strips_source_clientContext_w3c_after_construction",
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"handler": "w3c.getW3cAndSource",
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"request": {},
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"clientContext": {
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"custom": { "value": "test" },
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"w3c": {
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"traceparent": "00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01",
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"baggage": "userId=alice"
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}
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},
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"assertions": [
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{
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"response": {
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"w3c": {
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"traceparent": "00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01",
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"baggage": "userId=alice"
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},
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"clientContextIsDefined": true,
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"clientContextHasW3c": false,
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"clientContext": { "custom": { "value": "test" } }
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}
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}
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]
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}
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]
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}

‎test/dockerized/tasks/w3c.mjs‎

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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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//
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export const getW3c = async (_event, context) => {
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return context.w3c();
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};
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export const getW3cAndSource = async (_event, context) => {
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const clientContext = context.clientContext;
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return {
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w3c: context.w3c(),
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clientContextIsDefined: clientContext !== undefined,
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clientContextHasW3c:
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clientContext !== undefined && "w3c" in clientContext,
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clientContext: clientContext ?? null,
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};
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};
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export const echoClientContext = async (_event, context) => {
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return context.clientContext ?? null;
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};
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export const w3cIsFunction = async (_event, context) => {
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return { isFunction: typeof context.w3c === "function" };
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};

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