integ-runner: --watch flag creates a cdk.context.json with watch field

[dontirun]

Describe the bug

integ runner creates a cdk.context.json file with the watch field if the the context file does not exist, when it actually needs a cdk.json with the watch field.

Expected Behavior

Create a cdk.json with the watch field if it doesn't exist

Current Behavior

integ runner creates a cdk.context.json file with the watch field if the the context file does not exist

Reproduction Steps

1. Create a new application

mkdir bug
cdk init app --language=typescript

2. Add integ-runner and integ-tests-alpha to the package.json

  "dependencies": {
    "aws-cdk-lib": "2.144.0",
    "constructs": "^10.0.0",
    "@aws-cdk/integ-runner": "2.144.0-alpha.0",
    "@aws-cdk/integ-tests-alpha": "2.144.0-alpha.0",
    "source-map-support": "^0.5.21"
  }
}

3. npm install
4. create the following test/integ.example.test.ts file

import * as integ from '@aws-cdk/integ-tests-alpha';
import * as cdk from 'aws-cdk-lib';
import { Construct } from "constructs";

const app = new cdk.App();

class TestStack extends cdk.Stack {
  constructor(scope: Construct, id: string) {
    super(scope, id);
    new cdk.CfnWaitConditionHandle(this, 'NullResource');
  }
}
const stack = new TestStack(app, 'TestStack');
new integ.IntegTest(app, 'integration-test', {
  testCases: [stack],
});

5. Optional: delete the cdk.json file (doesn't matter)
6. npx integ-runner test/integ.example.test.ts --watch

Possible Solution

1. Don't create a cdk.context.json
2. create a /update the existing cdk.json with the watch field

Additional Information/Context

The documentation needs to be update to reflect this

CDK CLI Version

2.144.0 (build 5fb15bc)

Framework Version

No response

Node.js Version

v18.15.0

OS

Osx

Language

TypeScript

Language Version

No response

Other information

No response

[karmabadger]

@dontirun what's the content of the cdk.context.json? I feel like it's for a different purpose than the cdk.json.
I'm pretty sure cdk allows you to run without a cdk.json as long as you give it a --app so you can run it without having to be in a project directory. So in that sense I'm not sure if it makes sense necessarily to have a cdk.json autogenerated?

[dontirun]

It just has the watch property and nothing else. The watch property should be in the cdk.json

[karmabadger]

It just has the watch property and nothing else. The watch property should be in the cdk.json

yeah that seems a bit weird.

[pahud]

Yes it does create cdk.context.json with an empty watch. Looks like a bug to me.

{
  "watch": {}
}