scratch/algos/queue_test.go (view raw)
| 1 | package algos |
| 2 | |
| 3 | import "testing" |
| 4 | |
| 5 | func TestQueue(t *testing.T) { |
| 6 | q := Queue[int]{} |
| 7 | |
| 8 | q.Push(5) |
| 9 | q.Push(7) |
| 10 | q.Push(9) |
| 11 | |
| 12 | v, ok := q.Pop() |
| 13 | is(t, ok, true) |
| 14 | is(t, v, 5) |
| 15 | |
| 16 | is(t, q.Len, 2) |
| 17 | |
| 18 | q.Push(11) |
| 19 | |
| 20 | v, ok = q.Pop() |
| 21 | is(t, ok, true) |
| 22 | is(t, v, 7) |
| 23 | |
| 24 | v, ok = q.Pop() |
| 25 | is(t, ok, true) |
| 26 | is(t, v, 9) |
| 27 | |
| 28 | is(t, q.Peek(), 11) |
| 29 | |
| 30 | v, ok = q.Pop() |
| 31 | is(t, ok, true) |
| 32 | is(t, v, 11) |
| 33 | |
| 34 | _, ok = q.Pop() |
| 35 | is(t, ok, false) |
| 36 | |
| 37 | // everything works after removing all elements |
| 38 | q.Push(69420) |
| 39 | is(t, q.Peek(), 69420) |
| 40 | |
| 41 | v, ok = q.Pop() |
| 42 | is(t, ok, true) |
| 43 | is(t, v, 69420) |
| 44 | } |
| 45 | |
| 46 | func is[T comparable](tb testing.TB, a, b T) { |
| 47 | tb.Helper() |
| 48 | if a != b { |
| 49 | tb.Fatalf("%+v and %+v are not equal\n", a, b) |
| 50 | } |
| 51 | } |