// Copyright © 2023 Roberto Hidalgo <event-gateway@un.rob.mx>
// SPDX-License-Identifier: Apache-2.0
package types_test

import (
	"encoding/json"
	"fmt"
	"testing"

	"git.rob.mx/nidito/event-gateway/internal/source/types"
)

func TestUmarshalJSON(t *testing.T) {
	cases := []struct {
		Name     string
		JSON     string
		Error    error
		Expected types.Kind
	}{
		{
			Name:  "empty",
			JSON:  `""`,
			Error: types.ErrInvalid,
		},
		{
			Name:  "number",
			JSON:  `42`,
			Error: fmt.Errorf("json: cannot unmarshal number into Go value of type string"),
		},
		{
			Name:  "invalid",
			JSON:  `"42"`,
			Error: types.ErrInvalid,
		},
		{
			Name:     "valid",
			JSON:     `"consul"`,
			Error:    nil,
			Expected: types.Consul,
		},
	}

	for _, c := range cases {
		t.Run(c.Name, func(t *testing.T) {
			var res types.Kind
			if err := json.Unmarshal([]byte(c.JSON), &res); err != nil {
				if c.Error == nil {
					t.Fatalf("unexpected error for %s: %s", c.Name, err)
				}

				if err.Error() != c.Error.Error() {
					t.Fatalf("unexpected error for %s:\n\twanted: %s\n\n\tgot   : %s", c.Name, c.Error, err)
				}
				return
			}

			if res != c.Expected {
				t.Fatalf("did not parse into correct value, wanted: %s got: %s", c.Expected, res)
			}
		})
	}
}