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// 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 macho

import (
        "reflect"
        "testing"
)

type fileTest struct {
        file     string
        hdr      FileHeader
        segments []*SegmentHeader
        sections []*SectionHeader
}

var fileTests = []fileTest{
        {
                "testdata/gcc-386-darwin-exec",
                FileHeader{0xfeedface, Cpu386, 0x3, 0x2, 0xc, 0x3c0, 0x85},
                []*SegmentHeader{
                        {LoadCmdSegment, 0x38, "__PAGEZERO", 0x0, 0x1000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
                        {LoadCmdSegment, 0xc0, "__TEXT", 0x1000, 0x1000, 0x0, 0x1000, 0x7, 0x5, 0x2, 0x0},
                        {LoadCmdSegment, 0xc0, "__DATA", 0x2000, 0x1000, 0x1000, 0x1000, 0x7, 0x3, 0x2, 0x0},
                        {LoadCmdSegment, 0x7c, "__IMPORT", 0x3000, 0x1000, 0x2000, 0x1000, 0x7, 0x7, 0x1, 0x0},
                        {LoadCmdSegment, 0x38, "__LINKEDIT", 0x4000, 0x1000, 0x3000, 0x12c, 0x7, 0x1, 0x0, 0x0},
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                },
                []*SectionHeader{
                        {"__text", "__TEXT", 0x1f68, 0x88, 0xf68, 0x2, 0x0, 0x0, 0x80000400},
                        {"__cstring", "__TEXT", 0x1ff0, 0xd, 0xff0, 0x0, 0x0, 0x0, 0x2},
                        {"__data", "__DATA", 0x2000, 0x14, 0x1000, 0x2, 0x0, 0x0, 0x0},
                        {"__dyld", "__DATA", 0x2014, 0x1c, 0x1014, 0x2, 0x0, 0x0, 0x0},
                        {"__jump_table", "__IMPORT", 0x3000, 0xa, 0x2000, 0x6, 0x0, 0x0, 0x4000008},
                },
        },
        {
                "testdata/gcc-amd64-darwin-exec",
                FileHeader{0xfeedfacf, CpuAmd64, 0x80000003, 0x2, 0xb, 0x568, 0x85},
                []*SegmentHeader{
                        {LoadCmdSegment64, 0x48, "__PAGEZERO", 0x0, 0x100000000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
                        {LoadCmdSegment64, 0x1d8, "__TEXT", 0x100000000, 0x1000, 0x0, 0x1000, 0x7, 0x5, 0x5, 0x0},
                        {LoadCmdSegment64, 0x138, "__DATA", 0x100001000, 0x1000, 0x1000, 0x1000, 0x7, 0x3, 0x3, 0x0},
                        {LoadCmdSegment64, 0x48, "__LINKEDIT", 0x100002000, 0x1000, 0x2000, 0x140, 0x7, 0x1, 0x0, 0x0},
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                        nil,
                },
                []*SectionHeader{
                        {"__text", "__TEXT", 0x100000f14, 0x6d, 0xf14, 0x2, 0x0, 0x0, 0x80000400},
                        {"__symbol_stub1", "__TEXT", 0x100000f81, 0xc, 0xf81, 0x0, 0x0, 0x0, 0x80000408},
                        {"__stub_helper", "__TEXT", 0x100000f90, 0x18, 0xf90, 0x2, 0x0, 0x0, 0x0},
                        {"__cstring", "__TEXT", 0x100000fa8, 0xd, 0xfa8, 0x0, 0x0, 0x0, 0x2},
                        {"__eh_frame", "__TEXT", 0x100000fb8, 0x48, 0xfb8, 0x3, 0x0, 0x0, 0x6000000b},
                        {"__data", "__DATA", 0x100001000, 0x1c, 0x1000, 0x3, 0x0, 0x0, 0x0},
                        {"__dyld", "__DATA", 0x100001020, 0x38, 0x1020, 0x3, 0x0, 0x0, 0x0},
                        {"__la_symbol_ptr", "__DATA", 0x100001058, 0x10, 0x1058, 0x2, 0x0, 0x0, 0x7},
                },
        },
        {
                "testdata/gcc-amd64-darwin-exec-debug",
                FileHeader{0xfeedfacf, CpuAmd64, 0x80000003, 0xa, 0x4, 0x5a0, 0},
                []*SegmentHeader{
                        nil,
                        {LoadCmdSegment64, 0x1d8, "__TEXT", 0x100000000, 0x1000, 0x0, 0x0, 0x7, 0x5, 0x5, 0x0},
                        {LoadCmdSegment64, 0x138, "__DATA", 0x100001000, 0x1000, 0x0, 0x0, 0x7, 0x3, 0x3, 0x0},
                        {LoadCmdSegment64, 0x278, "__DWARF", 0x100002000, 0x1000, 0x1000, 0x1bc, 0x7, 0x3, 0x7, 0x0},
                },
                []*SectionHeader{
                        {"__text", "__TEXT", 0x100000f14, 0x0, 0x0, 0x2, 0x0, 0x0, 0x80000400},
                        {"__symbol_stub1", "__TEXT", 0x100000f81, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80000408},
                        {"__stub_helper", "__TEXT", 0x100000f90, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0},
                        {"__cstring", "__TEXT", 0x100000fa8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2},
                        {"__eh_frame", "__TEXT", 0x100000fb8, 0x0, 0x0, 0x3, 0x0, 0x0, 0x6000000b},
                        {"__data", "__DATA", 0x100001000, 0x0, 0x0, 0x3, 0x0, 0x0, 0x0},
                        {"__dyld", "__DATA", 0x100001020, 0x0, 0x0, 0x3, 0x0, 0x0, 0x0},
                        {"__la_symbol_ptr", "__DATA", 0x100001058, 0x0, 0x0, 0x2, 0x0, 0x0, 0x7},
                        {"__debug_abbrev", "__DWARF", 0x100002000, 0x36, 0x1000, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_aranges", "__DWARF", 0x100002036, 0x30, 0x1036, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_frame", "__DWARF", 0x100002066, 0x40, 0x1066, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_info", "__DWARF", 0x1000020a6, 0x54, 0x10a6, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_line", "__DWARF", 0x1000020fa, 0x47, 0x10fa, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_pubnames", "__DWARF", 0x100002141, 0x1b, 0x1141, 0x0, 0x0, 0x0, 0x0},
                        {"__debug_str", "__DWARF", 0x10000215c, 0x60, 0x115c, 0x0, 0x0, 0x0, 0x0},
                },
        },
}

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
                }
                for i, l := range f.Loads {
                        if i >= len(tt.segments) {
                                break
                        }
                        sh := tt.segments[i]
                        s, ok := l.(*Segment)
                        if sh == nil {
                                if ok {
                                        t.Errorf("open %s, section %d: skipping %#v\n", tt.file, i, &s.SegmentHeader)
                                }
                                continue
                        }
                        if !ok {
                                t.Errorf("open %s, section %d: not *Segment\n", tt.file, i)
                                continue
                        }
                        have := &s.SegmentHeader
                        want := sh
                        if !reflect.DeepEqual(have, want) {
                                t.Errorf("open %s, segment %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
                        }
                }
                tn := len(tt.segments)
                fn := len(f.Loads)
                if tn != fn {
                        t.Errorf("open %s: len(Loads) = %d, want %d", tt.file, fn, tn)
                }

                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)
                }

        }
}

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