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package bwt
import (
"fmt"
"math/rand"
"testing"
)
func TestTransformAndInverseTransform(t *testing.T) {
s := "abracadabra"
trans := "ard$rcaaaabb"
tr, err := Transform([]byte(s), '$')
if err != nil {
t.Error(err)
}
if string(tr) != trans {
t.Error("Test failed: Transform")
}
if string(InverseTransform([]byte(trans), '$')) != s {
t.Error("Test failed: InverseTransform")
}
}
func TestFromSuffixArray(t *testing.T) {
s := "GATGCGAGAGATG"
trans := "GGGGGGTCAA$TAA"
sa := SuffixArray([]byte(s))
B, err := FromSuffixArray([]byte(s), sa, '$')
if err != nil {
t.Error("Test failed: FromSuffixArray error")
}
if string(B) != trans {
t.Error("Test failed: FromSuffixArray returns wrong result")
}
}
func TestSA(t *testing.T) {
s := "mississippi"
sa := SuffixArray([]byte(s))
sa1 := []int{11, 10, 7, 4, 1, 0, 9, 8, 6, 3, 5, 2}
// fmt.Printf("%s\nanswer: %v, result: %v", s, sa1, sa)
if len(sa) != len(sa1) {
t.Error(fmt.Errorf("sa error. answer: %v, result: %v", sa1, sa))
return
}
for i := range sa {
if sa[i] != sa1[i] {
t.Error(fmt.Errorf("sa error. answer: %v, result: %v", sa1, sa))
return
}
}
}
var cases [][]byte
func init() {
rand.Seed(1)
alphabet := "ACGT"
n := len(alphabet)
scales := []float32{1e3, 1e5}
cases = make([][]byte, len(scales))
for i, scale := range scales {
l := rand.Float32() * scale * 10
buf := make([]byte, int(l))
for j := 0; j < int(l); j++ {
buf[j] = alphabet[rand.Intn(n)]
}
cases[i] = buf
}
}
var result []byte
func BenchmarkTransform(t *testing.B) {
var r []byte
var err error
for i := 0; i < t.N; i++ {
r, err = Transform(cases[0], '$')
if err != nil {
t.Error(err)
return
}
}
result = r
}
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