fix: Fixes the undefined error when running Table.transactGet

[kcwinner]

Fixes: #120

• Adding in integration tests using testcontainers.
• Fixing the res.Item when parsing the entity in Table.transactGet

I didn't add the jest integ stuff to the tests because I don't know your thoughts on all this.

[jeremydaly]

Hi @kcwinner. Thanks for this! Can you remove the integration tests for now and I'll merge this in? I have a ton of work done using dynalite, but I need to rethink this if transactions are supported.

[kcwinner]

@jeremydaly done! Let me know if you need anything. I'll keep the branch locally in case you want to use any of it later.

Here is where I've used the testcontainers with dynamodb local.

[jeremydaly]

Thanks, @kcwinner. I've merged the change and will check out the DynamoDB local stuff.

[jeremydaly]

FYI, I made a slight modification with 7eedde8 to do the Item check before the parsing happens. If no item is found, the DDB API returns {}, but if we run it through the parser first, it'll return { Item: {} } which is inconsistent.

[kcwinner]

Ah that makes sense!