func AhoCorasickReaderSpec(c gospec.Context) {
c.Specify("Basic test", func() {
strs := [][]byte{
[]byte("baa"),
[]byte("anba"),
[]byte("banana"),
}
acd := core.AhoCorasickPreprocess(strs)
str := "baababanananba"
res := core.AhoCorasickFromReader(acd, bytes.NewBuffer([]byte(str)), 2)
c.Expect(res[0], ContainsExactly, []int{0})
c.Expect(res[1], ContainsExactly, []int{10})
c.Expect(res[2], ContainsExactly, []int{5})
})
c.Specify("Substrings test", func() {
strs := [][]byte{
[]byte("baa"),
[]byte("aab"),
[]byte("aaa"),
[]byte("aa"),
}
acd := core.AhoCorasickPreprocess(strs)
str := "abbaababbbbaaaaaabbbbaabaabaabbb"
res := core.AhoCorasickFromReader(acd, bytes.NewBuffer([]byte(str)), 2)
c.Expect(res[0], ContainsExactly, []int{2, 10, 20, 23, 26})
c.Expect(res[1], ContainsExactly, []int{3, 15, 21, 24, 27})
c.Expect(res[2], ContainsExactly, []int{11, 12, 13, 14})
c.Expect(res[3], ContainsExactly, []int{3, 11, 12, 13, 14, 15, 21, 24, 27})
})
c.Specify("Comprehensive 12 x 2^3 x 2^9 test", func() {
for buf_size := 1; buf_size <= 12; buf_size++ {
var ps [][]byte
b := make([]byte, 3)
for augment(b, 2) {
p := make([]byte, 3)
copy(p, b)
ps = append(ps, p)
}
t := make([]byte, 9)
for augment(t, 2) {
acd := core.AhoCorasickPreprocess(ps)
acres := core.AhoCorasickFromReader(acd, bytes.NewBuffer(t), buf_size)
ires := idiotAhoCorasick(ps, t)
for i := range ps {
c.Expect(acres[i], ContainsExactly, ires[i])
}
}
}
})
}
// Like In(), but searches the data from a Reader instead of a []byte.
func (sf *StringSetFinder) InReader(input io.Reader) map[int][]int {
return core.AhoCorasickFromReader(sf.acd, input, 100000)
}