}
		}
		if !v.fail && val != v.value {
			t.Errorf("test %d, mismatching value: ReadBits(%d) = %d, want %d", i, v.nbits, val, v.value)
		}
	}
}

func TestMTF(t *testing.T) {
	var vectors = []struct {
		idx int   // Input index
		sym uint8 // Expected output symbol
	}{
		{idx: 1, sym: 1}, // [1 0 2 3 4]
		{idx: 0, sym: 1}, // [1 0 2 3 4]

	{3.999969482421875, 'x', 3, "0x1.000p+02"},
	{3.999969482421875, 'x', 2, "0x1.00p+02"},
	{3.999969482421875, 'x', 1, "0x1.0p+02"},
	{3.999969482421875, 'x', 0, "0x1p+02"},
}

func TestFtoa(t *testing.T) {
	for i := 0; i < len(ftoatests); i++ {
		test := &ftoatests[i]
		s := FormatFloat(test.f, test.fmt, test.prec, 64)
		if s != test.s {

		stack = append(stack, p)
	}

	var buf strings.Builder
	for i := len(stack) - 1; i >= 0; i-- {
		p := stack[i]
		fmt.Fprint(&buf, p.path)
		if p.testOf != nil {
			fmt.Fprint(&buf, ".test")
		}
		if i > 0 {
			if stack[i-1].testOf == p {
				fmt.Fprint(&buf, " tested by\n\t")
			} else {
				fmt.Fprint(&buf, " imports\n\t")
			}
		}
	}
	return buf.String()
}

  }

  public void testAbsent() {
    Optional<String> optionalName = Optional.absent();
    assertFalse(optionalName.isPresent());
  }

  public void testOf() {
    assertEquals("training", Optional.of("training").get());
  }

  public void testOf_null() {
    try {
      Optional.of(null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

	{"-9223372036854775807", -(1<<63 - 1), true},
	{"9223372036854775808", 0, false},
	{"-9223372036854775808", -1 << 63, true},
	{"9223372036854775809", 0, false},
	{"-9223372036854775809", 0, false},
}

func TestAtoi(t *testing.T) {
	switch intSize {
	case 32:
		for i := range atoi32tests {
			test := &atoi32tests[i]
			out, ok := runtime.Atoi(test.in)
			if test.out != int32(out) || test.ok != ok {

			if test.out != out || !reflect.DeepEqual(test.err, err) {
				t.Errorf("ParseInt(%q, 10, 0) = %v, %v want %v, %v",
					test.in, out, err, test.out, test.err)
			}
		}
	}
}

func TestAtoi(t *testing.T) {
	switch IntSize {
	case 32:
		for i := range parseInt32Tests {
			test := &parseInt32Tests[i]
			out, err := Atoi(test.in)
			var testErr error
			if test.err != nil {

func caseString(c int) string {
	switch c {
	case UpperCase:
		return "UpperCase"
	case LowerCase:
		return "LowerCase"
	case TitleCase:
		return "TitleCase"
	}
	return "ErrorCase"
}

func TestTo(t *testing.T) {
	for _, c := range caseTest {
		r := To(c.cas, c.in)
		if c.out != r {
			t.Errorf("To(U+%04X, %s) = U+%04X want U+%04X", c.in, caseString(c.cas), r, c.out)
		}
	}
}

func (ec *eofCounter) Read(b []byte) (n int, err error) {
	n, err = ec.reader.Read(b)
	if n == 0 {
		ec.eofCount++
	}
	return
}

// TestEOF verifies that when we scan, we see at most EOF once per call to a
// Scan function, and then only when it's really an EOF.
func TestEOF(t *testing.T) {
	ec := &eofCounter{strings.NewReader("123\n"), 0}
	var a int
	n, err := Fscanln(ec, &a)
	if err != nil {

	e := C.enum_E(C.Enum1)
	if e != 1 {
		t.Error("bad enum", C.Enum1)
	}

	e = C.enum_E(C.Enum2)
	if e != 2 {
		t.Error("bad enum", C.Enum2)
	}
}

func testAtol(t *testing.T) {
	l := Atol("123")
	if l != 123 {
		t.Error("Atol 123: ", l)
	}
}

func testErrno(t *testing.T) {
	p := C.CString("no-such-file")
	m := C.CString("r")

			// We check pkg.mod.Path here instead of pkg.inStd because the
			// pseudo-package "C" is not in std, but not provided by any module (and
			// shouldn't force loading the whole module graph).
			if pkg.testOf != nil || (pkg.mod.Path == "" && pkg.err == nil) || module.CheckImportPath(pkg.path) != nil {
				continue
			}

			// We need the checksum for the go.mod file for pkg.mod