package feed

import (
  "encoding/json"
  "testing"
)

func TestDataFormatUnmarshalInvalidData(t *testing.T) {
  test := []byte(`{}`)
  var val DataFormat

  if err := json.Unmarshal(test, &val); err == nil {
    t.Errorf("got \"%s\", exp error", val)
  }
}

func TestDataFormatUnmarshalUnknown(t *testing.T) {
  test := []byte(`"foo"`)
  exp := "unknown data format: foo"
  var val DataFormat

  err := json.Unmarshal(test, &val)
  if err == nil {
    t.Errorf("got \"%s\", exp error", val)
    return
  }

  if err.Error() != exp {
    t.Errorf("got \"%s\", exp \"%s\"", err.Error(), exp)
  }
}

func TestDataFormatUnmarshalValid(t *testing.T) {
  test := []byte(`"MITRE"`)
  exp := MitreFormat
  var got DataFormat

  if err := json.Unmarshal(test, &got); err != nil {
    t.Error(err)
    return
  }

  if got != exp {
    t.Errorf("got \"%s\", exp \"%s\"", got, exp)
  }
}

func TestDataFormatString(t *testing.T) {
  tests := []struct {
    val DataFormat
    exp string
  } {
    { MitreFormat, "MITRE" },
    { DataFormat(255), "DataFormat(255)" },
  }

  for _, test := range(tests) {
    t.Run(test.val.String(), func(t *testing.T) {
      got := test.val.String()
      if got != test.exp {
        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
      }
    })
  }
}