Binding Context Generator

Binding Context Generator provides the ability to generate binding contexts for hooks testing purposes.

Usage example:

1. Hook Config

config := `
configVersion: v1
schedule:
- name: every_minute
  crontab: '* * * * *'
  includeSnapshotsFrom:
  - pod
kubernetes:
- apiVersion: v1
  name: pod
  kind: Pod
  watchEvent:
  - Added
  - Modified
  - Deleted
  namespace:
    nameSelector:
      matchNames:
      - default`

2. Initial objects state

initialState := `
---
apiVersion: v1
kind: Pod
metadata:
  name: pod-0
---
apiVersion: v1
kind: Pod
metadata:
  name: pod-1
`

3. New state

newState := `
---
apiVersion: v1
kind: Pod
metadata:
  name: pod-0
`

4. Create new binding context controller

c := context.NewBindingContextController(config, initialState)

5. Register CRDs (if it is necessary) in format [Group, Version, Kind, isNamespaced]:

c.RegisterCRD("example.com", "v1", "Example", true)
c.RegisterCRD("example.com", "v1", "ClusterExample", false)

6. Run controller to get initial binding context

contexts, err := c.Run()
if err != nil {
  return err
}
testContexts(contexts)

7. Change state to get new binding contexts

contexts, err = c.ChangeState(newState)
if err != nil {
  return err
}
testNewContexts(contexts)

8. Run schedule to get binding contexts for a cron task

contexts, err = c.RunSchedule("* * * * *")
if err != nil {
  return err
}
testScheduleContexts(contexts)