Cannot default configuration item to `undefined`

[jsumners-nr]

node-newrelic/lib/config/index.js

Lines 1045 to 1047 in 4bde427

	if (!arbitrary && internal[key] === undefined) {
	return
	}

That block prohibits a default config like:

some_block: {
	nested_item: {
		default: undefined,
		env: 'ENV_VAR_NAME'
	}
}

The following will fail due to the linked code:

test(() => {
	const config = Config.initialize({
		some_block: {
			nested_item: 'find-me'
		}
	})
	assert.deepStrictEqual(config.some_block, { nested_item: 'find-me' })
})

[workato-integration]

https://new-relic.atlassian.net/browse/NR-357938

[bizob2828]

Looking at lib/config/default.js we set defaults to null for these cases

[bizob2828]

Doing

{
  some_block: {
    nested: {
      default: undefined
   }
  }
}

is fine it's when there's another layer that it fails.

{
  some_block_1: {
    some_block_2: {
      nested: {
        default: undefined
     }
    }
  }
}

[jsumners-nr]

Sorry, my original write up was written from the perspective that some_block is a child of the root agent configuration object. I should have been more clear.