Add asset generation tests

[aufi]

There is a new asset-generation feature being added to kantra in konveyor/kantra#435

E2E test scenarios should be defined, approved, written as part of this repository.

Selected subset of those tests should be marked as TIER0 and added to upstream CI execution.

[jordigilh]

Test 1:

• Prerequisites:

  • Local copy of PCF V3 manifest as defined here: https://raw.githubusercontent.com/gciavarrini/demo-kantra-asset-gen/refs/heads/main/cf-nodejs-app.yaml to ./cf-nodejs-app.yaml
  • Kantra CLI with the generate and discover subcommands supporting PCF V3

• Steps:

(1) Run command: kantra discover cloud-foundry --input ./cf-nodejs-app.yaml --output discover.yaml
(2) Validate that the generated file contains the following content:

name: cf-nodejs
randomRoute: true
timeout: 60
buildPacks:
- docker://my-registry-a.corp/nodejs
- docker://my-registry-b.corp/dynatrace
instances: 1

(3) Copy the helm found in https://github.com/gciavarrini/demo-kantra-asset-gen/tree/main/helm_sample to ./helm_sample
(4) Run command kantra generate helm --chart-dir ./helm_sample --input discover.yaml --output-dir ./manifests
(5) Validate the generated file in ./manifests matches the expected value:

apiVersion: v1
kind: ConfigMap
metadata:
  name: cf-nodejs-config
data:
  SPACE:
  VERSION:
  RANDOM_ROUTE: true
  TIMEOUT: "60"
  BUILD_PACKS: |
    - docker://my-registry-a.corp/nodejs
    - docker://my-registry-b.corp/dynatrace
  INSTANCES: "1"