v / vlib / datatypes
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1module datatypes


2


3fn test_is_empty() {


4    mut queue := Queue[int]{}


5    assert queue.is_empty() == true


6    queue.push(1)


7    assert queue.is_empty() == false


8}


9


10fn test_len() {


11    mut queue := Queue[int]{}


12    assert queue.len() == 0


13    queue.push(1)


14    assert queue.len() == 1


15    queue.pop()!


16    assert queue.len() == 0


17}


18


19fn test_peek() {


20    mut queue := Queue[int]{}


21    queue.push(1)


22    assert queue.peek()! == 1


23    queue.push(2)


24    assert queue.peek()! == 1


25    queue = Queue[int]{}


26    queue.peek() or { return }


27    assert false


28}


29


30fn test_last() {


31    mut queue := Queue[int]{}


32    queue.push(1)


33    assert queue.last()! == 1


34    queue.push(2)


35    assert queue.last()! == 2


36    queue = Queue[int]{}


37    queue.last() or { return }


38    assert false


39}


40


41fn test_index() {


42    mut queue := Queue[int]{}


43    queue.push(1)


44    assert queue.index(0)! == 1


45    queue.push(2)


46    assert queue.index(1)! == 2


47    queue.pop()!


48    queue.index(1) or { return }


49    assert false


50}


51


52fn test_push() {


53    mut queue := Queue[int]{}


54    queue.push(1)


55    queue.push(2)


56    assert queue.peek()! == 1


57}


58


59fn test_pop() {


60    mut queue := Queue[int]{}


61    queue.push(1)


62    queue.push(2)


63    queue.push(3)


64    assert queue.pop()! == 1


65    queue.push(4)


66    assert queue.pop()! == 2


67    assert queue.pop()! == 3


68    queue = Queue[int]{}


69    queue.pop() or { return }


70    assert false


71}


72


73fn test_array() {


74    mut queue := Queue[int]{}


75    queue.push(1)


76    queue.push(2)


77    assert queue.array() == [1, 2]


78}