// Copyright 2009 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package pe

import (
	"reflect"
	"testing"
)

type fileTest struct {
	file     string
	hdr      FileHeader
	opthdr   interface{}
	sections []*SectionHeader
	symbols  []*Symbol
}

var fileTests = []fileTest{
	{
		"testdata/gcc-386-mingw-obj",
		FileHeader{0x014c, 0x000c, 0x0, 0x64a, 0x1e, 0x0, 0x104},
		nil,
		[]*SectionHeader{
			{".text", 0, 0, 36, 500, 1440, 0, 3, 0, 0x60300020},
			{".data", 0, 0, 0, 0, 0, 0, 0, 0, 3224371264},
			{".bss", 0, 0, 0, 0, 0, 0, 0, 0, 3224371328},
			{".debug_abbrev", 0, 0, 137, 536, 0, 0, 0, 0, 0x42100000},
			{".debug_info", 0, 0, 418, 673, 1470, 0, 7, 0, 1108344832},
			{".debug_line", 0, 0, 128, 1091, 1540, 0, 1, 0, 1108344832},
			{".rdata", 0, 0, 16, 1219, 0, 0, 0, 0, 1076887616},
			{".debug_frame", 0, 0, 52, 1235, 1550, 0, 2, 0, 1110441984},
			{".debug_loc", 0, 0, 56, 1287, 0, 0, 0, 0, 1108344832},
			{".debug_pubnames", 0, 0, 27, 1343, 1570, 0, 1, 0, 1108344832},
			{".debug_pubtypes", 0, 0, 38, 1370, 1580, 0, 1, 0, 1108344832},
			{".debug_aranges", 0, 0, 32, 1408, 1590, 0, 2, 0, 1108344832},
		},
		[]*Symbol{
			{".file", 0x0, -2, 0x0, 0x67},
			{"_main", 0x0, 1, 0x20, 0x2},
			{".text", 0x0, 1, 0x0, 0x3},
			{".data", 0x0, 2, 0x0, 0x3},
			{".bss", 0x0, 3, 0x0, 0x3},
			{".debug_abbrev", 0x0, 4, 0x0, 0x3},
			{".debug_info", 0x0, 5, 0x0, 0x3},
			{".debug_line", 0x0, 6, 0x0, 0x3},
			{".rdata", 0x0, 7, 0x0, 0x3},
			{".debug_frame", 0x0, 8, 0x0, 0x3},
			{".debug_loc", 0x0, 9, 0x0, 0x3},
			{".debug_pubnames", 0x0, 10, 0x0, 0x3},
			{".debug_pubtypes", 0x0, 11, 0x0, 0x3},
			{".debug_aranges", 0x0, 12, 0x0, 0x3},
			{"___main", 0x0, 0, 0x20, 0x2},
			{"_puts", 0x0, 0, 0x20, 0x2},
		},
	},
	{
		"testdata/gcc-386-mingw-exec",
		FileHeader{0x014c, 0x000f, 0x4c6a1b60, 0x3c00, 0x282, 0xe0, 0x107},
		&OptionalHeader32{
			0x10b, 0x2, 0x38, 0xe00, 0x1a00, 0x200, 0x1160, 0x1000, 0x2000, 0x400000, 0x1000, 0x200, 0x4, 0x0, 0x1, 0x0, 0x4, 0x0, 0x0, 0x10000, 0x400, 0x14abb, 0x3, 0x0, 0x200000, 0x1000, 0x100000, 0x1000, 0x0, 0x10,
			[16]DataDirectory{
				{0x0, 0x0},
				{0x5000, 0x3c8},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x7000, 0x18},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
			},
		},
		[]*SectionHeader{
			{".text", 0xcd8, 0x1000, 0xe00, 0x400, 0x0, 0x0, 0x0, 0x0, 0x60500060},
			{".data", 0x10, 0x2000, 0x200, 0x1200, 0x0, 0x0, 0x0, 0x0, 0xc0300040},
			{".rdata", 0x120, 0x3000, 0x200, 0x1400, 0x0, 0x0, 0x0, 0x0, 0x40300040},
			{".bss", 0xdc, 0x4000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0400080},
			{".idata", 0x3c8, 0x5000, 0x400, 0x1600, 0x0, 0x0, 0x0, 0x0, 0xc0300040},
			{".CRT", 0x18, 0x6000, 0x200, 0x1a00, 0x0, 0x0, 0x0, 0x0, 0xc0300040},
			{".tls", 0x20, 0x7000, 0x200, 0x1c00, 0x0, 0x0, 0x0, 0x0, 0xc0300040},
			{".debug_aranges", 0x20, 0x8000, 0x200, 0x1e00, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_pubnames", 0x51, 0x9000, 0x200, 0x2000, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_pubtypes", 0x91, 0xa000, 0x200, 0x2200, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_info", 0xe22, 0xb000, 0x1000, 0x2400, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_abbrev", 0x157, 0xc000, 0x200, 0x3400, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_line", 0x144, 0xd000, 0x200, 0x3600, 0x0, 0x0, 0x0, 0x0, 0x42100000},
			{".debug_frame", 0x34, 0xe000, 0x200, 0x3800, 0x0, 0x0, 0x0, 0x0, 0x42300000},
			{".debug_loc", 0x38, 0xf000, 0x200, 0x3a00, 0x0, 0x0, 0x0, 0x0, 0x42100000},
		},
		[]*Symbol{},
	},
	{
		"testdata/gcc-amd64-mingw-obj",
		FileHeader{0x8664, 0x6, 0x0, 0x198, 0x12, 0x0, 0x4},
		nil,
		[]*SectionHeader{
			{".text", 0x0, 0x0, 0x30, 0x104, 0x15c, 0x0, 0x3, 0x0, 0x60500020},
			{".data", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0500040},
			{".bss", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0500080},
			{".rdata", 0x0, 0x0, 0x10, 0x134, 0x0, 0x0, 0x0, 0x0, 0x40500040},
			{".xdata", 0x0, 0x0, 0xc, 0x144, 0x0, 0x0, 0x0, 0x0, 0x40300040},
			{".pdata", 0x0, 0x0, 0xc, 0x150, 0x17a, 0x0, 0x3, 0x0, 0x40300040},
		},
		[]*Symbol{
			{".file", 0x0, -2, 0x0, 0x67},
			{"main", 0x0, 1, 0x20, 0x2},
			{".text", 0x0, 1, 0x0, 0x3},
			{".data", 0x0, 2, 0x0, 0x3},
			{".bss", 0x0, 3, 0x0, 0x3},
			{".rdata", 0x0, 4, 0x0, 0x3},
			{".xdata", 0x0, 5, 0x0, 0x3},
			{".pdata", 0x0, 6, 0x0, 0x3},
			{"__main", 0x0, 0, 0x20, 0x2},
			{"puts", 0x0, 0, 0x20, 0x2},
		},
	},
	{
		"testdata/gcc-amd64-mingw-exec",
		FileHeader{0x8664, 0x9, 0x53472993, 0x0, 0x0, 0xf0, 0x22f},
		&OptionalHeader64{
			0x20b, 0x2, 0x16, 0x6a00, 0x2400, 0x1600, 0x14e0, 0x1000, 0x400000, 0x1000, 0x200, 0x4, 0x0, 0x0, 0x0, 0x5, 0x2, 0x0, 0x11000, 0x400, 0x1841e, 0x3, 0x0, 0x200000, 0x1000, 0x100000, 0x1000, 0x0, 0x10,
			[16]DataDirectory{
				{0x0, 0x0},
				{0xe000, 0x990},
				{0x0, 0x0},
				{0xa000, 0x498},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x10000, 0x28},
				{0x0, 0x0},
				{0x0, 0x0},
				{0xe254, 0x218},
				{0x0, 0x0},
				{0x0, 0x0},
				{0x0, 0x0},
			},
		},
		[]*SectionHeader{
			{".text", 0x6860, 0x1000, 0x6a00, 0x400, 0x0, 0x0, 0x0, 0x0, 0x60500020},
			{".data", 0xe0, 0x8000, 0x200, 0x6e00, 0x0, 0x0, 0x0, 0x0, 0xc0500040},
			{".rdata", 0x6b0, 0x9000, 0x800, 0x7000, 0x0, 0x0, 0x0, 0x0, 0x40600040},
			{".pdata", 0x498, 0xa000, 0x600, 0x7800, 0x0, 0x0, 0x0, 0x0, 0x40300040},
			{".xdata", 0x488, 0xb000, 0x600, 0x7e00, 0x0, 0x0, 0x0, 0x0, 0x40300040},
			{".bss", 0x1410, 0xc000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0600080},
			{".idata", 0x990, 0xe000, 0xa00, 0x8400, 0x0, 0x0, 0x0, 0x0, 0xc0300040},
			{".CRT", 0x68, 0xf000, 0x200, 0x8e00, 0x0, 0x0, 0x0, 0x0, 0xc0400040},
			{".tls", 0x48, 0x10000, 0x200, 0x9000, 0x0, 0x0, 0x0, 0x0, 0xc0600040},
		},
		[]*Symbol{},
	},
}

func isOptHdrEq(a, b interface{}) bool {
	switch va := a.(type) {
	case *OptionalHeader32:
		vb, ok := b.(*OptionalHeader32)
		if !ok {
			return false
		}
		return *vb == *va
	case *OptionalHeader64:
		vb, ok := b.(*OptionalHeader64)
		if !ok {
			return false
		}
		return *vb == *va
	case nil:
		return b == nil
	}
	return false
}

func TestOpen(t *testing.T) {
	for i := range fileTests {
		tt := &fileTests[i]

		f, err := Open(tt.file)
		if err != nil {
			t.Error(err)
			continue
		}
		if !reflect.DeepEqual(f.FileHeader, tt.hdr) {
			t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr)
			continue
		}
		if !isOptHdrEq(tt.opthdr, f.OptionalHeader) {
			t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.OptionalHeader, tt.opthdr)
			continue
		}

		for i, sh := range f.Sections {
			if i >= len(tt.sections) {
				break
			}
			have := &sh.SectionHeader
			want := tt.sections[i]
			if !reflect.DeepEqual(have, want) {
				t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
			}
		}
		tn := len(tt.sections)
		fn := len(f.Sections)
		if tn != fn {
			t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn)
		}
		for i, have := range f.Symbols {
			if i >= len(tt.symbols) {
				break
			}
			want := tt.symbols[i]
			if !reflect.DeepEqual(have, want) {
				t.Errorf("open %s, symbol %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
			}
		}
	}
}

func TestOpenFailure(t *testing.T) {
	filename := "file.go"    // not a PE file
	_, err := Open(filename) // don't crash
	if err == nil {
		t.Errorf("open %s: succeeded unexpectedly", filename)
	}
}