package dbx

import (
	"bytes"
	"encoding/json"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestMarshalUint64(t *testing.T) {
	var buf bytes.Buffer
	MarshalUint64(9007199254740993).MarshalGQL(&buf)
	assert.Equal(t, `"9007199254740993"`, buf.String())
}

func TestUnmarshalUint64_String(t *testing.T) {
	n, err := UnmarshalUint64("42")
	require.NoError(t, err)
	assert.Equal(t, uint64(42), n)
}

func TestUnmarshalUint64_Number(t *testing.T) {
	n, err := UnmarshalUint64(float64(42))
	require.NoError(t, err)
	assert.Equal(t, uint64(42), n)
}

func TestUnmarshalUint64_RoundTripJSON(t *testing.T) {
	const original uint64 = 9007199254740993
	var buf bytes.Buffer
	MarshalUint64(original).MarshalGQL(&buf)

	var wire string
	require.NoError(t, json.Unmarshal(buf.Bytes(), &wire))

	got, err := UnmarshalUint64(wire)
	require.NoError(t, err)
	assert.Equal(t, original, got)
}

func TestUnmarshalUint64_Invalid(t *testing.T) {
	_, err := UnmarshalUint64(true)
	assert.Error(t, err)

	_, err = UnmarshalUint64(float64(-1))
	assert.Error(t, err)
}