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Typescript error when mocking EC2

See original GitHub issue

when mocking EC2

const ec2ClientMock = mockClient(EC2Client);
const ec2 = new EC2Client({ region: "eu-west-1" });

I’m getting this error:


Argument of type 'typeof EC2Client' is not assignable to parameter of type 'InstanceOrClassType<Client<ServiceInputTypes, MetadataBearer, any>>'.
  Type 'typeof EC2Client' is not assignable to type 'ClassType<Client<ServiceInputTypes, MetadataBearer, any>>'.
    The types of 'prototype.middlewareStack.concat' are incompatible between these types.
      Type '<InputType extends ServiceInputTypes, OutputType extends ServiceOutputTypes>(from: MiddlewareStack<InputType, OutputType>) => MiddlewareStack<InputType, OutputType>' is not assignable to type '<InputType extends ServiceInputTypes, OutputType extends MetadataBearer>(from: MiddlewareStack<InputType, OutputType>) => MiddlewareStack<InputType, OutputType>'.
        Types of parameters 'from' and 'from' are incompatible.
          Type 'MiddlewareStack<InputType, OutputType>' is not assignable to type 'MiddlewareStack<InputType, ServiceOutputTypes>'.
            Types of property 'addRelativeTo' are incompatible.
              Type '(middleware: MiddlewareType<InputType, OutputType>, options: RelativeMiddlewareOptions) => void' is not assignable to type '(middleware: MiddlewareType<InputType, ServiceOutputTypes>, options: RelativeMiddlewareOptions) => void'.
                Types of parameters 'middleware' and 'middleware' are incompatible.
                  Type 'MiddlewareType<InputType, ServiceOutputTypes>' is not assignable to type 'MiddlewareType<InputType, OutputType>'.
                    Type 'InitializeMiddleware<InputType, ServiceOutputTypes>' is not assignable to type 'MiddlewareType<InputType, OutputType>'.
                      Type 'InitializeMiddleware<InputType, ServiceOutputTypes>' is not assignable to type 'InitializeMiddleware<InputType, OutputType>'.
                        Call signature return types 'InitializeHandler<InputType, ServiceOutputTypes>' and 'InitializeHandler<InputType, OutputType>' are incompatible.
                          Type 'Promise<InitializeHandlerOutput<ServiceOutputTypes>>' is not assignable to type 'Promise<InitializeHandlerOutput<OutputType>>'.
                            Type 'InitializeHandlerOutput<ServiceOutputTypes>' is not assignable to type 'InitializeHandlerOutput<OutputType>'.
                              Types of property 'output' are incompatible.
                                Type 'ServiceOutputTypes' is not assignable to type 'OutputType'.
                                  'ServiceOutputTypes' is assignable to the constraint of type 'OutputType', but 'OutputType' could be instantiated with a different subtype of constraint 'MetadataBearer'.
                                    Type 'MetadataBearer' is not assignable to type 'OutputType'.
                                      'MetadataBearer' is assignable to the constraint of type 'OutputType', but 'OutputType' could be instantiated with a different subtype of constraint 'MetadataBearer'.

Using latest version 0.3.1

Issue Analytics

State:
Created 2 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

1reaction

m-radzikowskicommented, May 31, 2021

Hey. Took me a moment but it should work now in v0.5.0, with AWS SDK v3.17.0.

Compatibility with different SDK Clients will be now checked and monitored, see compatibility.md

Please let me know in case something still doesn’t work.

0reactions

m-radzikowskicommented, Oct 9, 2022

@raphaeldeem-acorns compatibility page was removed as the lib now works well with all SDK Clients.

The Argument of type 'AwsStub<object, MetadataBearer>' is not assignable to parameter of type... is often caused by the problem explained in the caveats section of the README. Please check it out, if this doesn’t help open a new issue with a reproduction example.

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