Action Inputs: Check if input satisfies the input type

[7tupel]

As Developer I would like that the input of Actions is checked using the specified type.

Rationale
The Action definition requires to specify a type of the input. As of now, this information is not used when the Action is executed by a runner. It would be of great benefit to automatically check the type spec is satisfied for the input and stop the execution of the Action if not.

Technical Details
A runner should implement a check by running a validation function on all inputs before executing the Actions function.

Acceptance Criteria

• The runner runs a test for all Action inputs before executing the Action
• An Action is executed when the input checks are all valid
• An Actions fails and is not executed when any of the input checks fails
• Several unit tests exists to test this

Related Issues

• Actions: Add optional spec for inputs and outputs #105

Stakeholder

• Developer