t.Errorf("want=%q", data[0:len(written)])
					t.Errorf("have=%q", written)
				}
			}
		}
	}
}

func TestWriterAppend(t *testing.T) {
	got := new(bytes.Buffer)
	var want []byte
	rn := rand.New(rand.NewSource(0))
	w := NewWriterSize(got, 64)
	for i := 0; i < 100; i++ {
		// Obtain a buffer to append to.
		b := w.AvailableBuffer()
		if w.Available() != cap(b) {

	VADDPS.BCST 2032(DX)(AX*2), Z1, Z29  // 6261745858ac42f0070000
	// Forced EVEX encoding due to suffixes.
	VADDPD.BCST 2032(DX), X0, X0 // 62f1fd185882f0070000
	VADDPD.BCST 2032(DX), Y0, Y0 // 62f1fd385882f0070000
	// Test new Z-cases one-by-one.
	//
	// Zevex_i_r_k_rm.
	VCVTPS2PH $1, Z2, K5, Y21 // 62b37d4d1dd501
	VCVTPS2PH $2, Z21, K4, Y2 // 62e37d4c1dea02
	// Zevex_i_r_rm.
	VCVTPS2PH $1, Z2, Y21 // 62b37d481dd501

	return messWith("crc32-not-streamed.zip", func(b []byte) {
		// Corrupt foo.txt's final crc32 byte, in both
		// the file header and TOC. (0x7e -> 0x7f)
		b[0x11]++
		b[0x9d]++

		// TODO(bradfitz): add a new test that only corrupts
		// one of these values, and verify that that's also an
		// error. Currently, the reader code doesn't verify the
		// fileheader and TOC's crc32 match if they're both

				i = 0
			}
			continue
		}
		arg[i] = r
		i++
	}
	if quoted || i > 0 {
		args = append(args, string(arg[:i]))
	}
	if quote != 0 {
		err = errors.New("unclosed quote")
	} else if escaped {
		err = errors.New("unfinished escaping")
	}
	return args, err
}

// Translate rewrites f.AST, the original Go input, to remove
// references to the imported package C, replacing them with

		in = in[:len(tt.in)]
		out := Replace(in, []byte(tt.old), []byte(tt.new), tt.n)
		if s := string(out); s != tt.out {
			t.Errorf("Replace(%q, %q, %q, %d) = %q, want %q", tt.in, tt.old, tt.new, tt.n, s, tt.out)
		}
		if cap(in) == cap(out) && &in[:1][0] == &out[:1][0] {
			t.Errorf("Replace(%q, %q, %q, %d) didn't copy", tt.in, tt.old, tt.new, tt.n)
		}
		if tt.n == -1 {