silverstripe-subsites/tests/SubsiteTest.yml

Subsite_Template:
   main:
      Title: Template
      Domain: test.com
   other:
      Title: Other Template
      Domain: other.com
   
Page:
   home:
      Title: Home
      SubsiteID: =>Subsite_Template.main
   about:
      Title: About
      SubsiteID: =>Subsite_Template.main
   staff:
      Title: Staff
      ParentID: =>Page.about
      SubsiteID: =>Subsite_Template.main
   contact:
      Title: Contact Us
      SubsiteID: =>Subsite_Template.main

# Pages from the other template - added here as a control group :-)
   home2:
      Title: Home
      SubsiteID: =>Subsite_Template.other
   contact2:
      Title: Contact Us
      SubsiteID: =>Subsite_Template.other
      
#ErrorPage:
#   404:
#      Title: Page not Found
#      ErrorCode: 404
#      SubsiteID: =>Subsite_Template.main

Group:
   admin:
      Title: Admin
   

Member:
   admin:
      FirstName: Admin
      Surname: User
      Email: admin@test.com
      Password: rangi
      Groups: =>Group.admin
   
Permission:
   admin:
      Code: ADMIN
      GroupID: =>Group.admin