h := new(Hash)
		h.WriteString("foo")
		m[h.Sum64()>>32] = struct{}{}
	}
	if len(m) < N/2 {
		t.Errorf("from %d seeds, wanted at least %d different hashes; got %d", N, N/2, len(m))
	}
}

func TestRepeat(t *testing.T) {
	h1 := new(Hash)
	h1.WriteString("testing")
	sum1 := h1.Sum64()

	h1.Reset()
	h1.WriteString("testing")
	sum2 := h1.Sum64()

	if sum1 != sum2 {

  public void testPadEnd_null() {
    try {
      Strings.padEnd(null, 5, '0');
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testRepeat() {
    String input = "20";
    assertEquals("", Strings.repeat(input, 0));
    assertEquals("20", Strings.repeat(input, 1));
    assertEquals("2020", Strings.repeat(input, 2));

			_ = Concat(ss...)
		}()
		if didPanic := r != nil; didPanic != tc.shouldPanic {
			t.Errorf("slices.Concat(lens(%v)) got panic == %v",
				tc.lengths, didPanic)
		}
	}
}

func TestRepeat(t *testing.T) {
	// normal cases
	for _, tc := range []struct {
		x     []int
		count int
		want  []int
	}{
		{x: []int(nil), count: 0, want: []int{}},
		{x: []int(nil), count: 1, want: []int{}},

	{" ", longSpaces, len(longSpaces)},
	// Tests for results over the chunkLimit
	{string(rune(0)), string(make([]byte, 1<<16)), 1 << 16},
	{longString, longString + longString, 2},
}

func TestRepeat(t *testing.T) {
	for _, tt := range RepeatTests {
		a := Repeat(tt.in, tt.count)
		if !equal("Repeat(s)", a, tt.out, t) {
			t.Errorf("Repeat(%v, %d) = %v; want %v", tt.in, tt.count, a, tt.out)
			continue

	{"abc ", "abc abc abc ", 3},
	// Tests for results over the chunkLimit
	{string(rune(0)), string(make([]byte, 1<<16)), 1 << 16},
	{longString, longString + longString, 2},
}

func TestRepeat(t *testing.T) {
	for _, tt := range RepeatTests {
		tin := []byte(tt.in)
		tout := []byte(tt.out)
		a := Repeat(tin, tt.count)
		if !Equal(a, tout) {