nsf_test.go

package main

import (
	"bytes"
	"encoding/binary"
	"testing"
)

// tests here are aimed against the methods in nsf.go

var validHeader = []byte{
	0x4E, 0x45, 0x53, 0x4D, 0x1A, 0x01, 0x08, 0x01, 0x60, 0x8D, 0x03, 0xA0, 0x00, 0xA0, 0x54, 0x68,
	0x65, 0x20, 0x4C, 0x65, 0x67, 0x65, 0x6E, 0x64, 0x20, 0x6F, 0x66, 0x20, 0x5A, 0x65, 0x6C, 0x64,
	0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4B, 0x6F,
	0x6A, 0x69, 0x20, 0x4B, 0x6F, 0x6E, 0x64, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x31, 0x39,
	0x38, 0x37, 0x20, 0x4E, 0x69, 0x6E, 0x74, 0x65, 0x6E, 0x64, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1A, 0x41,
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}

var getIsValidError = func(h *nsfHeader) string { _, e := h.isValid(); return e.Error() }
var getString = func(h *nsfHeader) string { return h.String() }

func TestIsValidWithInvalidFourCC(t *testing.T) {
	testHeader(t, 1, 0x55, "invalid FourCC", getIsValidError)
}

func TestIsValidWithInvalidChips(t *testing.T) {
	testHeader(t, 123, 1<<7 /* "future chip" bit that must never be set */, "extra sound chip section contains unsupported values", getIsValidError)
}

func TestStringWithMultiChipsFile(t *testing.T) {
	testHeader(t, 123, 1<<1|1<<3, ": VRC7, MMC5", getString)
}

func TestStringWithValidPALFile(t *testing.T) {
	testHeader(t, 122, 1<<0, ": PAL", getString)
}

func TestStringWithValidDualRegionFile(t *testing.T) {
	testHeader(t, 122, 1<<1, ": dual PAL/NTSC", getString)
}

func testHeader(t *testing.T, newValIdx uint8, newVal byte, expectedContent string, fn func(*nsfHeader) string) {
	var newHeader = append([]byte(nil), validHeader...)
	newHeader[newValIdx] = newVal

	h := new(nsfHeader)
	e := binary.Read(bytes.NewReader(newHeader), binary.LittleEndian, h)
	if e != nil {
		t.Fatal(e)
	}

	s := fn(h) // calls the actual operation on the header: IsValid(), String(), etc.

	mustContain(t, s, expectedContent)
}