[transforms.lua_v2_log]
  inputs = []
  type = "lua"
  version = "2"
  hooks.process = """
    function (event, emit)
      event.log.a, event.log.b = nil, event.log.a
      emit(event)
    end
  """
[[tests]]
  name = "lua_v2_log"
  [tests.input]
    insert_at = "lua_v2_log"
    type = "log"
    [tests.input.log_fields]
      a = "example value"
  [[tests.outputs]]
    extract_from = "lua_v2_log"
    [[tests.outputs.conditions]]
      type = "vrl"
      source = '''
        !exists(.a) &&
        .b == "example value"
      '''

[transforms.lua_v2_source]
  inputs = []
  type = "lua"
  version = "2"
  source = """
  function hook_process (event, emit)
    event.log.inserted_field = "inserted value"
    emit(event)
  end
  """
  hooks.process = "hook_process"
[[tests]]
  name = "lua_v2_source"
  [tests.input]
    insert_at = "lua_v2_source"
    type = "log"
    [tests.input.log_fields]
      some_field = "some value"
  [[tests.outputs]]
    extract_from = "lua_v2_source"
    [[tests.outputs.conditions]]
      type = "vrl"
      source = '''
        .some_field == "some value" &&
        .inserted_field == "inserted value"
      '''

[transforms.lua_v2_metric]
  inputs = []
  type = "lua"
  version = "2"
  hooks.process = """
    function (event, emit)
      event.metric.counter.value = event.metric.counter.value + 1
      emit(event)
    end
  """
[[tests]]
  name = "lua_v2_metric"
  [tests.input]
    insert_at = "lua_v2_metric"
    type = "metric"
    [tests.input.metric]
      name = "example counter"
      kind = "absolute"
      counter.value = 1.0
  [[tests.outputs]]
    extract_from = "lua_v2_metric"
    [[tests.outputs.conditions]]
      type = "is_metric"

[transforms.lua_v2_log_to_metric]
  inputs = []
  type = "lua"
  version = "2"
  hooks.process = """
    function (event, emit)
      event.log = nil
      event.metric = {
        name = "example metric",
        counter = {
          value = 1.0
        }
      }
      emit(event)
    end
  """
[[tests]]
  name = "lua_v2_log_to_metric"
  [tests.input]
    insert_at = "lua_v2_log_to_metric"
    type = "log"
    [tests.input.log_fields]
      a = "example value"
  [[tests.outputs]]
    extract_from = "lua_v2_log_to_metric"
    [[tests.outputs.conditions]]
      type = "is_metric"

[transforms.lua_v2_metric_to_log]
  inputs = []
  type = "lua"
  version = "2"
  hooks.process = """
    function (event, emit)
      event.metric = nil
      event.log = {
        field = "example value"
      }
      emit(event)
    end
  """
[[tests]]
  name = "lua_v2_metric_to_log"
  [tests.input]
    insert_at = "lua_v2_metric_to_log"
    type = "metric"
    [tests.input.metric]
      name = "example metric"
      kind = "absolute"
      counter.value = 1.0
  [[tests.outputs]]
    extract_from = "lua_v2_metric_to_log"
    [[tests.outputs.conditions]]
      type = "vrl"
      source = '''
        .field == "example value"
      '''