`DELETE / "c308"`,
		`DELETE /?code=404 "c404"`,
	}
	want := strings.Join(wantSegments, "\n")
	run(t, func(t *testing.T, mode testMode) {
		testRedirectsByMethod(t, mode, "DELETE", deleteRedirectTests, want)
	})
}

func testRedirectsByMethod(t *testing.T, mode testMode, method string, table []redirectTest, want string) {
	var log struct {
		sync.Mutex
		bytes.Buffer
	}
	var ts *httptest.Server

// in "Range": "bytes=-N", and should reject "bytes=--2".
func TestServeFileRejectsInvalidSuffixLengths(t *testing.T) {
	run(t, testServeFileRejectsInvalidSuffixLengths, []testMode{http1Mode, https1Mode, http2Mode})
}
func testServeFileRejectsInvalidSuffixLengths(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, FileServer(Dir("testdata"))).ts

	tests := []struct {
		r        string
		wantCode int
		wantBody string

	}
}

// If -testwork is specified, the test prints the name of the temp directory
// and does not remove it when done, so that a programmer can
// poke at the test file tree afterward.
var testWork = flag.Bool("testwork", false, "")

// cleanup cleans up a test that runs testgo.
func (tg *testgoData) cleanup() {
	tg.t.Helper()
	if *testWork {
		if tg.tempdir != "" {

				// So make 'no tests to run' a hard failure when testing package testing itself.
				fmt.Print(chatty.prefix(), "FAIL: package testing must run tests\n")
				testOk = false
			}
		}
		anyFailed := !testOk || !exampleOk || !fuzzTargetsOk || !runBenchmarks(m.deps.ImportPath(), m.deps.MatchString, m.benchmarks)
		if !anyFailed && race.Errors() > 0 {

	for i := 0; i < 2; i++ {
		wg.Add(1)
		go func() {
			Marshal(B{[]A{{}}})
			wg.Done()
		}()
	}
	wg.Wait()
}

func TestIsValidDirective(t *testing.T) {
	testOK := []string{
		"<>",
		"< < > >",
		"<!DOCTYPE '<' '>' '>' <!--nothing-->>",
		"<!DOCTYPE doc [ <!ELEMENT doc ANY> <!ELEMENT doc ANY> ]>",
		"<!DOCTYPE doc [ <!ELEMENT doc \"ANY> '<' <!E\" LEMENT '>' doc ANY> ]>",

		}
	}
	for i := -1074; i <= 1023; i++ {
		f := Ldexp(1, i)
		l := Log2(f)
		if l != float64(i) {
			t.Errorf("Log2(2**%d) = %g, want %d", i, l, i)
		}
	}
}

func TestModf(t *testing.T) {
	for i := 0; i < len(vf); i++ {
		if f, g := Modf(vf[i]); !veryclose(modf[i][0], f) || !veryclose(modf[i][1], g) {
			t.Errorf("Modf(%g) = %g, %g, want %g, %g", vf[i], f, g, modf[i][0], modf[i][1])
		}