package feed

import (
  "encoding/json"
  "testing"
)

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

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

func TestNodeOpUnmarshalUnknown(t *testing.T) {
  test := []byte(`"foo"`)
  exp := "unknown operator: foo"
  var val NodeOp

  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 TestNodeOpUnmarshalValid(t *testing.T) {
  tests := []struct {
    val string
    exp NodeOp
  } {
    { "\"AND\"", AndOp },
    { "\"OR\"", OrOp },
  }

  for _, test := range(tests) {
    t.Run(test.val, func(t *testing.T) {
      var got NodeOp
      if err := json.Unmarshal([]byte(test.val), &got); err != nil {
        t.Error(err)
        return
      }

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

func TestNodeOpString(t *testing.T) {
  tests := []struct {
    val NodeOp
    exp string
  } {
    { AndOp, "AND" },
    { OrOp, "OR" },

    { NodeOp(255), "NodeOp(255)" },
  }

  for _, test := range(tests) {
    t.Run(test.exp, func(t *testing.T) {
      got := test.val.String()

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