factor := 1 - math.Pow(10, -digits+1)
	return x*factor <= y && y*factor <= x
}

func TestMMU(t *testing.T) {
	t.Parallel()

	// MU
	// 1.0  *****   *****   *****
	// 0.5      *   *   *   *
	// 0.0      *****   *****
	//      0   1   2   3   4   5
	util := [][]trace.MutatorUtil{{
		{0e9, 1},
		{1e9, 0},
		{2e9, 1},
		{3e9, 0},
		{4e9, 1},
		{5e9, 0},
	}}
	mmuCurve := trace.NewMMUCurve(util)

	testCases := []struct {
		name   string
		addr   string
		port   int32
		expect string
	}{
		{
			name:   "IPv4 all-zeros bind address has port",
			addr:   "0.0.0.0:12345",
			port:   23456,
			expect: "0.0.0.0:12345",
		},
		{
			name:   "non-zeros IPv4 config",
			addr:   "9.8.7.6",
			port:   12345,
			expect: "9.8.7.6:12345",
		},
		{

000000f0  0a 13 02 47 6f 31 0b 30  09 06 03 55 04 03 13 02  |...Go1.0...U....|
00000100  47 6f 30 81 9f 30 0d 06  09 2a 86 48 86 f7 0d 01  |Go0..0...*.H....|
00000110  01 01 05 00 03 81 8d 00  30 81 89 02 81 81 00 db  |........0.......|
00000120  46 7d 93 2e 12 27 06 48  bc 06 28 21 ab 7e c4 b6  |F}...'.H..(!.~..|
00000130  a2 5d fe 1e 52 45 88 7a  36 47 a5 08 0d 92 42 5b  |.]..RE.z6G....B[|
00000140  c2 81 c0 be 97 79 98 40  fb 4f 6d 14 fd 2b 13 8b  |.....y.@.Om..+..|

		{"0.00000000050", decQuantity(1, -9, DecimalSI)},
		{"0.5e-9", decQuantity(1, -9, DecimalExponent)},
		{"0.9n", decQuantity(1, -9, DecimalSI)},
		{"0.00000012345", decQuantity(124, -9, DecimalSI)},
		{"0.00000012354", decQuantity(124, -9, DecimalSI)},
		{"9Ei", Quantity{d: maxAllowed, Format: BinarySI}},
		{"9223372036854775807Ki", Quantity{d: maxAllowed, Format: BinarySI}},

				config.ClusterCIDR = "fd00:192:168:59::/64"
			},
		},
		"alternate healthz port": {
			mutateConfigFunc: func(config *kubeproxyconfig.KubeProxyConfiguration) {
				config.HealthzBindAddress = "0.0.0.0:12345"
			},
		},
		"ClusterCIDR is wrong IP family": {
			mutateConfigFunc: func(config *kubeproxyconfig.KubeProxyConfiguration) {
				config.ClusterCIDR = "fd00:192:168::/64"
			},
		},

		{`"2000-01-01T1:12:34Z"`, `<nil>`},
		{`"2000-01-01T00:00:00,000Z"`, `<nil>`},
		{`"2000-01-01T00:00:00+24:00"`, `<nil>`},
		{`"2000-01-01T00:00:00+00:60"`, `<nil>`},
		{`"2000-01-01T00:00:00+123:45"`, `parsing time "2000-01-01T00:00:00+123:45" as "2006-01-02T15:04:05Z07:00": cannot parse "+123:45" as "Z07:00"`},
	}

	for _, tt := range tests {
		var ts Time

		want := tt.want
		err := json.Unmarshal([]byte(tt.in), &ts)