func TestRef(t *testing.T) {
for _, elem := range data {
var h32 hash.Hash32 = New32()
h32.Write([]byte(elem.s))
if v := h32.Sum32(); v != elem.h32 {
t.Errorf("'%s': 0x%x (want 0x%x)", elem.s, v, elem.h32)
}
var h32_byte hash.Hash32 = New32()
h32_byte.Write([]byte(elem.s))
target := fmt.Sprintf("%08x", elem.h32)
if p := fmt.Sprintf("%x", h32_byte.Sum(nil)); p != target {
t.Errorf("'%s': %s (want %s)", elem.s, p, target)
}
if v := Sum32([]byte(elem.s)); v != elem.h32 {
t.Errorf("'%s': 0x%x (want 0x%x)", elem.s, v, elem.h32)
}
var h64 hash.Hash64 = New64()
h64.Write([]byte(elem.s))
if v := h64.Sum64(); v != elem.h64_1 {
t.Errorf("'%s': 0x%x (want 0x%x)", elem.s, v, elem.h64_1)
}
var h64_byte hash.Hash64 = New64()
h64_byte.Write([]byte(elem.s))
target = fmt.Sprintf("%016x", elem.h64_1)
if p := fmt.Sprintf("%x", h64_byte.Sum(nil)); p != target {
t.Errorf("Sum64: '%s': %s (want %s)", elem.s, p, target)
}
if v := Sum64([]byte(elem.s)); v != elem.h64_1 {
t.Errorf("Sum64: '%s': 0x%x (want 0x%x)", elem.s, v, elem.h64_1)
}
var h128 Hash128 = New128()
h128.Write([]byte(elem.s))
if v1, v2 := h128.Sum128(); v1 != elem.h64_1 || v2 != elem.h64_2 {
t.Errorf("New128: '%s': 0x%x-0x%x (want 0x%x-0x%x)", elem.s, v1, v2, elem.h64_1, elem.h64_2)
}
var h128_byte Hash128 = New128()
h128_byte.Write([]byte(elem.s))
target = fmt.Sprintf("%016x%016x", elem.h64_1, elem.h64_2)
if p := fmt.Sprintf("%x", h128_byte.Sum(nil)); p != target {
t.Errorf("New128: '%s': %s (want %s)", elem.s, p, target)
}
if v1, v2 := Sum128([]byte(elem.s)); v1 != elem.h64_1 || v2 != elem.h64_2 {
t.Errorf("Sum128: '%s': 0x%x-0x%x (want 0x%x-0x%x)", elem.s, v1, v2, elem.h64_1, elem.h64_2)
}
}
}
func becnchmark(b *testing.B, h hash.Hash32, n int64) {
b.SetBytes(n)
data := make([]byte, n)
for i := range data {
data[i] = byte(i)
}
in := make([]byte, 0, h.Size())
b.ResetTimer()
for i := 0; i < b.N; i++ {
h.Reset()
h.Write(data)
h.Sum(in)
}
}
func benchmark(b *testing.B, h hash.Hash32, n, alignment int64) {
b.SetBytes(n)
data := make([]byte, n+alignment)
data = data[alignment:]
for i := range data {
data[i] = byte(i)
}
in := make([]byte, 0, h.Size())
// Warm up
h.Reset()
h.Write(data)
h.Sum(in)
b.ResetTimer()
for i := 0; i < b.N; i++ {
h.Reset()
h.Write(data)
h.Sum(in)
}
}
func testGolden(t *testing.T, h hash.Hash32, golden []_Golden, which string) {
for _, g := range golden {
h.Reset()
h.Write([]byte(g.in))
sum := h.Sum32()
if sum != g.out {
t.Errorf("%s(%s) = 0x%x want 0x%x", which, g.in, sum, g.out)
}
bsum := h.Sum(nil)
if len(bsum) != 4 {
t.Errorf("%s Sum(nil) returned %d bytes, wanted 4: %s\n", which, len(bsum), bsum)
}
s := binary.BigEndian.Uint32(bsum)
if s != sum {
t.Errorf("%s(%s).Sum(nil) = 0x%x want 0x%x", which, g.in, sum, g.out)
}
bsum = h.Sum([]byte{0x01, 0x02, 0x03, 0x04})
if len(bsum) != 8 {
t.Errorf("%s Sum(bsum) returned %d bytes, wanted 8: %x\n", which, len(bsum), bsum)
}
s = binary.BigEndian.Uint32(bsum[0:])
s2 := binary.BigEndian.Uint32(bsum[4:])
if s != 0x01020304 || s2 != sum {
t.Errorf("%s(%s).Sum(bsum) = %x (expected 0x01020304 %x )", which, g.in, bsum, sum)
}
}
}
func doHash(in string) string {
var h hash.Hash32 = murmur3.New32()
h.Write([]byte(in))
return hex.EncodeToString(h.Sum(nil))
}
Describe("Sum32", func() {
It("defaults to 0", func() {
Expect(jhash.Sum32()).To(Equal(uint32(0)))
})
It("sums hash", func() {
jhash.Write(key)
Expect(jhash.Sum32()).To(Equal(uint32(884782484)))
})
})
Describe("Sum", func() {
It("default 0 hash byte returned", func() {
expected := []byte{0x41, 0x70, 0x70, 0x6c, 0x65, 0x0, 0x0, 0x0, 0x0}
Expect(jhash.Sum(key)).To(Equal(expected))
})
It("returns sum byte array", func() {
jhash.Write(key)
expected := []byte{0x41, 0x70, 0x70, 0x6c, 0x65, 0x34, 0xbc, 0xb5, 0x94}
Expect(jhash.Sum(key)).To(Equal(expected))
})
})
})