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package lcs
import (
"context"
"reflect"
"testing"
"time"
)
func TestLCS(t *testing.T) {
cases := []struct {
left []interface{}
right []interface{}
indexPairs []IndexPair
values []interface{}
length int
}{
{
left: []interface{}{1, 2, 3},
right: []interface{}{2, 3},
indexPairs: []IndexPair{{1, 0}, {2, 1}},
values: []interface{}{2, 3},
length: 2,
},
{
left: []interface{}{2, 3},
right: []interface{}{1, 2, 3},
indexPairs: []IndexPair{{0, 1}, {1, 2}},
values: []interface{}{2, 3},
length: 2,
},
{
left: []interface{}{2, 3},
right: []interface{}{2, 5, 3},
indexPairs: []IndexPair{{0, 0}, {1, 2}},
values: []interface{}{2, 3},
length: 2,
},
{
left: []interface{}{2, 3, 3},
right: []interface{}{2, 5, 3},
indexPairs: []IndexPair{{0, 0}, {2, 2}},
values: []interface{}{2, 3},
length: 2,
},
{
left: []interface{}{1, 2, 5, 3, 1, 1, 5, 8, 3},
right: []interface{}{1, 2, 3, 3, 4, 4, 5, 1, 6},
indexPairs: []IndexPair{{0, 0}, {1, 1}, {2, 6}, {4, 7}},
values: []interface{}{1, 2, 5, 1},
length: 4,
},
{
left: []interface{}{},
right: []interface{}{2, 5, 3},
indexPairs: []IndexPair{},
values: []interface{}{},
length: 0,
},
{
left: []interface{}{3, 4},
right: []interface{}{},
indexPairs: []IndexPair{},
values: []interface{}{},
length: 0,
},
{
left: []interface{}{"foo"},
right: []interface{}{"baz", "foo"},
indexPairs: []IndexPair{{0, 1}},
values: []interface{}{"foo"},
length: 1,
},
{
left: []interface{}{byte('T'), byte('G'), byte('A'), byte('G'), byte('T'), byte('A')},
right: []interface{}{byte('G'), byte('A'), byte('T'), byte('A')},
indexPairs: []IndexPair{{1, 0}, {2, 1}, {4, 2}, {5, 3}},
values: []interface{}{byte('G'), byte('A'), byte('T'), byte('A')},
length: 4,
},
}
for i, c := range cases {
lcs := New(c.left, c.right)
actualPairs := lcs.IndexPairs()
if !reflect.DeepEqual(actualPairs, c.indexPairs) {
t.Errorf("test case %d failed at index pair, actual: %#v, expected: %#v", i, actualPairs, c.indexPairs)
}
actualValues := lcs.Values()
if !reflect.DeepEqual(actualValues, c.values) {
t.Errorf("test case %d failed at values, actual: %#v, expected: %#v", i, actualValues, c.values)
}
actualLength := lcs.Length()
if actualLength != c.length {
t.Errorf("test case %d failed at length, actual: %d, expected: %d", i, actualLength, c.length)
}
}
}
func TestContextCancel(t *testing.T) {
left := make([]interface{}, 100000) // takes over 1 sec
right := make([]interface{}, 100000)
right[0] = 1
right[len(right)-1] = 1
lcs := New(left, right)
ctx, cancel := context.WithCancel(context.Background())
go func() {
time.Sleep(time.Second)
cancel()
}()
_, err := lcs.LengthContext(ctx)
if err != context.Canceled {
t.Fatalf("unexpected err: %s", err)
}
}
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