func TestMergeSort(t *testing.T) {
var test = []struct {
A []int
start, end int
want []int
}{
{[]int{1, 2, 3, 4, 5}, 0, 5, []int{1, 2, 3, 4, 5}},
{[]int{}, 0, 0, []int{}},
{[]int{1}, 0, 1, []int{1}},
{[]int{5, 4, 3, 2, 1}, 1, 4, []int{5, 1, 2, 3, 4}},
}
for i, te := range test {
MergeSortIntSlice(te.A, te.start, te.end+1)
if !util.EqualsIntSlice(te.A, te.want) {
t.Errorf("%d: want:%v, but:%v \n", i, te.want, te.A)
}
}
}
func TestMerge(t *testing.T) {
var tests = []struct {
arr []int
p, q, r int
res []int
}{
{[]int{1, 2, 3, 5, 6, 7}, 0, 2, 5, []int{1, 2, 3, 5, 6, 7}},
{[]int{1}, 0, 0, 0, []int{1}},
{[]int{1, 3, 5, 2, 4}, 0, 2, 4, []int{1, 2, 3, 4, 5}},
{[]int{5, 2, 3, 4, 1, 0}, 2, 3, 4, []int{5, 2, 1, 3, 4, 0}},
{[]int{5, 4, 2, 3, 1}, 2, 3, 4, []int{5, 4, 1, 2, 3}},
{[]int{5, 4, 3, 2, 1}, 1, 1, 2, []int{5, 3, 4, 2, 1}},
}
for i, te := range tests {
merge(MergeIntSlice(te.arr), te.p, te.q, te.r)
if !util.EqualsIntSlice(te.arr, te.res) {
t.Errorf("%d: want:%v, but:%v \n", i, te.res, te.arr)
}
}
}
