buf := make([]byte, 1<<16)
			for i := 0; i < len(buf); i += skip {
				buf[i] = 1
			}
			for i := 0; i < b.N; i++ {
				Index(buf, key)
			}
		})
	}
}

func TestClone(t *testing.T) {
	var cloneTests = [][]byte{
		[]byte(nil),
		[]byte{},
		Clone([]byte{}),
		[]byte(strings.Repeat("a", 42))[:0],
		[]byte(strings.Repeat("a", 42))[:0:0],
		[]byte("short"),

		}
		return true
	}

	// manual test cases
	for _, tt := range truncateRoundTests {
		testOne(tt.t.Unix(), int64(tt.t.Nanosecond()), int64(tt.d))
	}

	// exhaustive near 0
	for i := 0; i < 100; i++ {
		for j := 1; j < 100; j++ {
			testOne(unixToZero, int64(i), int64(j))
			testOne(unixToZero, -int64(i), int64(j))
			if t.Failed() {
				return
			}
		}
	}

	if t.Failed() {

func testClientTimeoutCancel(t *testing.T, mode testMode) {
	testDone := make(chan struct{})
	ctx, cancel := context.WithCancel(context.Background())

	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		w.(Flusher).Flush()
		<-testDone
	}))
	defer close(testDone)

	cst.c.Timeout = 1 * time.Hour
	req, _ := NewRequest("GET", cst.ts.URL, nil)

	s.Close()
	var opErr *net.OpError
	if !errors.As(err, &opErr) || opErr.Err != error(alertUnknownCA) {
		t.Errorf("Got error: %s; expected: %s", err, error(alertUnknownCA))
	}
}

func TestClose(t *testing.T) {
	c, s := localPipe(t)
	go c.Close()

	err := Server(s, testConfig).Handshake()
	s.Close()
	if err != io.EOF {
		t.Errorf("Got error: %s; expected: %s", err, io.EOF)
	}
}

		EndElement{Name{"", "foo"}},
	},
	want: `<foo></foo>`,
}, {
	desc: "directive",
	toks: []Token{
		Directive("foo"),
	},
	want: `<!foo>`,
}}

func TestClose(t *testing.T) {
	for _, tt := range closeTests {
		tt := tt
		t.Run(tt.desc, func(t *testing.T) {
			var out strings.Builder
			enc := NewEncoder(&out)
			for j, tok := range tt.toks {

  status = file->Tell(&position);
  EXPECT_EQ(status.code(), Code::OK);
  EXPECT_EQ(position, test_data.size());
}

TEST_P(ModularFileSystemTest, TestClose) {
  const std::string filename = GetURIForPath("a_file");
  std::unique_ptr<WritableFile> file;
  Status status = env_->NewWritableFile(filename, &file);
  if (!status.ok())