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HowTo: Live test of createSignedFetch()

Background: our test located in src/index.spec.ts has a test that will make live calls to a lambda function if the SIGNED_FETCH_TEST_LAMBDA_URL environment variable is set. This is useful for testing the library against a real AWS service. However, it means you need to manually deploy a test stack to AWS to create the backing resource.

The below assumes you have AWS credentials loaded in your environment with admin permissions.

Deploy our test stack:

make -C test-stack deploy-stack

Test that the test lambda function works properly:

function_name=$(make -C test-stack get-function-name)
aws lambda invoke \
    --function-name $function_name \
    /dev/stdout

Get the IAM-protected URL for the lambda function:

function_url=$(make -C test-stack get-function-url)

Test that the URL works using the awscurl tool to sign the request:

awscurl --service lambda $function_url

Run our test, triggering the live test by setting the SIGNED_FETCH_TEST_LAMBDA_URL environment variable:

pnpm run build
SIGNED_FETCH_TEST_LAMBDA_URL=$function_url pnpm run test

If everything looks good, you can clean up the test stack:

make -C test-stack destroy-stack