// The contents of fsys must not change concurrently with TestFS.
//
// If TestFS finds any misbehaviors, it returns either the first error or a
// list of errors. Use [errors.Is] or [errors.As] to inspect.
//
// Typical usage inside a test is:
//
//	if err := fstest.TestFS(myFS, "file/that/should/be/present"); err != nil {
//		t.Fatal(err)
//	}
func TestFS(fsys fs.FS, expected ...string) error {

[TestFS] now returns a structured error that can be unwrapped
(via method `Unwrap() []error`). This allows inspecting errors

	if err := os.Symlink(filepath.Join(tmp, "hello"), filepath.Join(tmp, "hello.link")); err != nil {
		t.Fatal(err)
	}

	if err := TestFS(tmpfs, "hello", "hello.link"); err != nil {
		t.Fatal(err)
	}
}

func TestDash(t *testing.T) {
	m := MapFS{
		"a-b/a": {Data: []byte("a-b/a")},
	}
	if err := TestFS(m, "a-b/a"); err != nil {
		t.Error(err)
	}
}

type shuffledFS MapFS

	// should propagate the NaN to their output.
	for i := 0; i < len(fs); i++ {
		testfs := Clone(fs)
		testfs[i] = math.NaN()

		fmin := Min(testfs)
		if !math.IsNaN(fmin) {
			t.Errorf("got min %v, want NaN", fmin)
		}

		fmax := Max(testfs)
		if !math.IsNaN(fmax) {
			t.Errorf("got max %v, want NaN", fmax)
		}
	}
}

)

func TestMapFS(t *testing.T) {
	m := MapFS{
		"hello":             {Data: []byte("hello, world\n")},
		"fortune/k/ken.txt": {Data: []byte("If a program is too slow, it must have a loop.\n")},
	}
	if err := TestFS(m, "hello", "fortune", "fortune/k", "fortune/k/ken.txt"); err != nil {
		t.Fatal(err)
	}
}

func TestMapFSChmodDot(t *testing.T) {
	m := MapFS{
		"a/b.txt": &MapFile{Mode: 0666},

	from, to := "renameFROM", "RENAMEfrom"
	tests := []struct {
		name   string
		create func() error
	}{
		{"dir", func() error {
			return Mkdir(from, 0777)
		}},
		{"file", func() error {
			fd, err := Create(from)
			if err != nil {
				return err
			}
			return fd.Close()
		}},
	}

	for _, test := range tests {
		pt.Run(test.name, func(t *testing.T) {

	"k8s.io/kubernetes/pkg/volume/util"
	volumetypes "k8s.io/kubernetes/pkg/volume/util/types"
)

var (
	testDriver  = "test-driver"
	testVol     = "vol-123"
	testns      = "test-ns"
	testPod     = "test-pod"
	testPodUID  = types.UID("test-pod")
	testAccount = "test-service-account"
)

			if test.initialSeatsExpected != workestimateGot.InitialSeats {
				t.Errorf("Expected work estimate to match: %d initial seats, but got: %d", test.initialSeatsExpected, workestimateGot.InitialSeats)
			}
			if test.finalSeatsExpected != workestimateGot.FinalSeats {
				t.Errorf("Expected work estimate to match: %d final seats, but got: %d", test.finalSeatsExpected, workestimateGot.FinalSeats)
			}

	testWn[127] = float32(dn / m1)
	testFn[0] = 1.0
	testFn[127] = float32(math.Exp(-0.5 * dn * dn))
	for i := 126; i >= 1; i-- {
		dn = math.Sqrt(-2.0 * math.Log(vn/dn+math.Exp(-0.5*dn*dn)))
		testKn[i+1] = uint32((dn / tn) * m1)
		tn = dn
		testFn[i] = float32(math.Exp(-0.5 * dn * dn))
		testWn[i] = float32(dn / m1)
	}
	return
}

func initExp() (testKe []uint32, testWe, testFe []float32) {

	testWn[127] = float32(dn / m1)
	testFn[0] = 1.0
	testFn[127] = float32(math.Exp(-0.5 * dn * dn))
	for i := 126; i >= 1; i-- {
		dn = math.Sqrt(-2.0 * math.Log(vn/dn+math.Exp(-0.5*dn*dn)))
		testKn[i+1] = uint32((dn / tn) * m1)
		tn = dn
		testFn[i] = float32(math.Exp(-0.5 * dn * dn))
		testWn[i] = float32(dn / m1)
	}
	return
}

func initExp() (testKe []uint32, testWe, testFe []float32) {