input[i] = byte(i % 251)
		if i%101 == 0 {
			input[i] ^= byte(i / 101)
		}
	}
	return input
}

func TestReaderWriteTo(t *testing.T) {
	input := createTestInput(8192)
	r := NewReader(onlyReader{bytes.NewReader(input)})
	w := new(bytes.Buffer)
	if n, err := r.WriteTo(w); err != nil || n != int64(len(input)) {
		t.Fatalf("r.WriteTo(w) = %d, %v, want %d, nil", n, err, len(input))
	}

		[]byte("short"),
		[]byte(strings.Repeat("a", 42)),
	}
	for _, input := range cloneTests {
		clone := Clone(input)
		if !Equal(clone, input) {
			t.Errorf("Clone(%q) = %q; want %q", input, clone, input)
		}

		if input == nil && clone != nil {
			t.Errorf("Clone(%#v) return value should be equal to nil slice.", input)
		}

		if input != nil && clone == nil {

				t.Fatalf("Error mismatch\n\tGot:  %v\n\tWant: %v", err, ErrFormat)
			}
		})
	}
}

func TestIssue54801(t *testing.T) {
	for _, input := range []string{"testdata/readme.zip", "testdata/dd.zip"} {
		z, err := OpenReader(input)
		if err != nil {
			t.Fatal(err)
		}
		defer z.Close()

		for _, f := range z.File {
			// Make file a directory
			f.Name += "/"

// Copyright 2017 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.

// This input extends auto-generated amd64enc.s test suite
// with manually added tests.

#include "../../../../../runtime/textflag.h"

TEXT asmtest(SB),DUPOK|NOSPLIT,$0
	// AVX2GATHER: basic combinations.
	VPGATHERDQ Y2, (BP)(X7*2), Y1           // c4e2ed904c7d00

// gccCmd returns the gcc command line to use for compiling
// the input.
func (p *Package) gccCmd() []string {
	c := append(gccBaseCmd,
		"-w",          // no warnings
		"-Wno-error",  // warnings are not errors
		"-o"+gccTmp(), // write object to tmp
		"-gdwarf-2",   // generate DWARF v2 debugging symbols
		"-c",          // do not link
		"-xc",         // input language is C
	)
	if p.GccIsClang {
		c = append(c,

// Copyright 2015 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.

// This input was created by taking the instruction productions in
// the old assembler's (5a's) grammar and hand-writing complete
// instructions for each rule, to guarantee we cover the same space.

#include "../../../../../runtime/textflag.h"

TEXT	foo(SB), DUPOK|NOSPLIT, $0

// ADD
//

// Copyright 2015 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.

// This input was created by taking the instruction productions in
// the old assembler's (7a's) grammar and hand-writing complete
// instructions for each rule, to guarantee we cover the same space.

#include "../../../../../runtime/textflag.h"

TEXT	foo(SB), DUPOK|NOSPLIT, $-8