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package tests
import (
"fmt"
"github.com/xrash/smetrics"
"testing"
)
func TestHamming(t *testing.T) {
cases := []hammingcase{
{"a", "a", 0},
{"a", "b", 1},
{"AAAA", "AABB", 2},
{"BAAA", "AAAA", 1},
{"BAAA", "CCCC", 4},
{"karolin", "kathrin", 3},
{"karolin", "kerstin", 3},
{"1011101", "1001001", 2},
{"2173896", "2233796", 3},
}
for _, c := range cases {
r, err := smetrics.Hamming(c.a, c.b)
if err != nil {
t.Fatalf("got error from hamming err=%s", err)
}
if r != c.diff {
fmt.Println(r, "instead of", c.diff)
t.Fail()
}
}
}
func TestHammingError(t *testing.T) {
res, err := smetrics.Hamming("a", "bbb")
if err == nil {
t.Fatalf("expected error from 'a' and 'bbb' on hamming")
}
if res != -1 {
t.Fatalf("erroring response wasn't -1, but %d", res)
}
}
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