package fibonacci import ( "bytes" "io" "strings" "testing" ) func TestNumbers(t *testing.T) { n := New(32) expected := []uint64{1, 1, 2, 3, 5, 8, 13, 21} for i, v := range expected { if f := n[i]; f != v { t.Error("Unexpected value for", i, f, "expected", v) } } } func TestCoding(t *testing.T) { n := New(32) for i := uint64(0); i < 4096; i++ { enc, _ := n.Code(i) //fmt.Printf("%d - %b, %d\n", i, enc, len) dec, _ := n.Decode(enc) if i != dec { t.Errorf("Unexpected value for %d - enc is %b, dec is %d\n", i, enc, dec) } } } func TestWriter(t *testing.T) { var buf bytes.Buffer var w io.Writer = Writer(&buf) var input []byte = make([]byte, 256) var fib Numbers = New(16) for i := uint64(0); i < 256; i++ { input[i] = byte(i) } // Write the input count, err := w.Write(input) if count != len(input) { t.Error("Unexpected write count", count) } if err != nil { t.Error("Unexpected write error", err.Error()) } // Flush remaining bits count, err = w.Write(nil) if count != 0 { t.Error("Unexpected write count while flushing", count) } if err != nil { t.Error("Unexpected write error while flushing", err.Error()) } var output string for _, v := range buf.Bytes() { output += u2s(uint64(v), 8) } for i, v := range input { c, l := fib.Code(uint64(v)) vs := u2s(c, l) if loc := strings.Index(output, vs); loc != 0 { t.Fatal("Unexpected location for", i, "value", vs) } output = output[len(vs):] } } func u2s(b uint64, l byte) (result string) { for i := byte(0); i < l; i++ { if (b & 1) > 0 { result += "1" } else { result += "0" } b >>= 1 } return }