.Net Core (2.1)- Lambda function does work while 2.2 doesn't?

[RoyiNamir]

I've created a simple empty AWS Lambda function using .Net Core 2.1 :

Here is the folder structure :

(here is the csproj)

And a FunctionHandler which gets DI and invoke some dummy method :

Now let's run the "Mock Lambda Test Tool" , we can see that it works :

So where is the problem?

I've read here that 2.2 is supported :

This means you can now author Lambda functions using .NET Core 2.2 and
.NET Core 3.0 preview. Amazon.Lambda.RuntimeSupport is available as
source code on GitHub, or as a NuGet package.

And so , I've created a new empty lambda project but with 2.2 :

• Here are the changes in the CSPROJ file
• And here are the changes in the aws-lambda-tools-defaults.json file

Same code. But now when I run "Mock Lambda Test Tool" , I get an error :

AWS .NET Mock Lambda Test Tool (0.9.2) Unknown error occurred causing
process exit: Failed to find a deps.json file at
Amazon.Lambda.TestTool.Runtime.LocalLambdaRuntime.Initialize(String
directory) in
E:\JenkinsWorkspaces\Lam\LambdaSandboxCoreCLRApi\Tools\LambdaTestTool\Amazon.Lambda.TestTool\Runtime\LocalLambdaRuntime.cs:line
50 at Amazon.Lambda.TestTool.Program.Main(String[] args) in
E:\JenkinsWorkspaces\Lam\LambdaSandboxCoreCLRApi\Tools\LambdaTestTool\Amazon.Lambda.TestTool\Program.cs:line
46 Press any key to exit

Here is the error :

Question:

Why is that? I didn't have any deps.json file in 2.1 .

So why do I need it in 2.2 ?
Also, what is this path appearing in the error: E:\JenkinsWorkspaces... ?
I don't have Jenkins nor something like it.

[RoyiNamir]

Update , I think it's a bug : but I found the reason :

https://stackoverflow.com/questions/56619863/net-core-2-1-lambda-function-does-work-while-in-2-2-it-doesnt

[normj]

Unfortunately the mock testing tool doesn't currently support Lambda functions using the custom runtime feature. We have a GitHub issue tracking this #427

[klaytaybai]

I'm going to close this out as a duplicate in favor of #427.