package resource_test

import (
	"fmt"
	"math"
	"testing"

	"github.com/inkyblackness/hacked/ss1/resource"

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

func TestIDValueReturnsOwnValue(t *testing.T) {
	assert.Equal(t, uint16(0), resource.ID(0).Value())
	assert.Equal(t, uint16(123), resource.ID(123).Value())
	assert.Equal(t, uint16(math.MaxUint16), resource.ID(math.MaxUint16).Value(), "maximum of uint16 should be supported")
}

func TestIDImplementsStringer(t *testing.T) {
	assert.Equal(t, "0FA0", fmt.Sprintf("%v", resource.ID(0x0FA0)))
}

func TestIDPlusReturnsOffsetValue(t *testing.T) {
	tt := []struct {
		base     resource.ID
		offset   int
		expected resource.ID
	}{
		{0, 0, 0},
		{10, 0, 10},
		{10, 2, 12},
		{10, -2, 8},
	}

	for _, tc := range tt {
		result := tc.base.Plus(tc.offset)
		assert.Equal(t, tc.expected, result, "ID mismatch")
	}
}