Implemented the funge stack

tests/stack.nim

@@ -0,0 +1,131 @@
+import unittest
+
+include ../src/stack
+
+suite "Stack":
+  test "Pop":
+    var empty = NewStack()
+    check empty[].Pop() == 0
+    var simple = NewStack()
+    simple.data[0] = 1
+    simple.data[1] = 5
+    simple.height = 2
+    check simple[].Pop() == 5
+    check simple[].Pop() == 1
+    check simple[].Pop() == 0
+  test "Push":
+    var s = NewStack()
+    check s.height == 0
+    check s.data[0] == 0
+    check s.data[1] == 0
+    check s.data[2] == 0
+    s[].Push(5)
+    check s.height == 1
+    check s.data[0] == 5
+    check s.data[1] == 0
+    check s.data[2] == 0
+    s[].Push(-2)
+    check s.height == 2
+    check s.data[0] == 5
+    check s.data[1] == -2
+    check s.data[2] == 0
+  test "PopVector":
+    var empty = NewStack()
+    check empty[].PopVector() == (0, 0)
+    check empty.height == 0
+    var some = NewStack()
+    some[].Push(2)
+    check some[].PopVector() == (0, 2)
+    check some.height == 0
+    var full = NewStack()
+    full[].Push(1)
+    full[].Push(2)
+    full[].Push(3)
+    check full[].PopVector() == (2, 3)
+    check full.height == 1
+  test "PushVector":
+    var s = NewStack()
+    check s.height == 0
+    check s.data[0] == 0
+    check s.data[1] == 0
+    check s.data[2] == 0
+    s[].PushVector((5, -3))
+    check s.height == 2
+    check s.data[0] == 5
+    check s.data[1] == -3
+    check s.data[2] == 0
+  test "Clear":
+    var empty: Stack
+    empty.Clear()
+    check empty.height == 0
+    var some = NewStack()
+    some[].Push(1)
+    some[].Push(2)
+    some[].Clear()
+    check some.height == 0
+  test "Duplicate":
+    var empty = NewStack()
+    empty[].Duplicate()
+    check empty.height == 2
+    check empty.data[0] == 0
+    check empty.data[1] == 0
+    var some = NewStack()
+    some[].Push(2)
+    some[].Push(-4)
+    some[].Duplicate()
+    check some.height == 3
+    check some.data[0] == 2
+    check some.data[1] == -4
+    check some.data[2] == -4
+    check some.data[3] == 0
+  test "Swap":
+    var empty = NewStack()
+    empty[].Swap()
+    check empty.height == 2
+    check empty.data[0] == 0
+    check empty.data[1] == 0
+    var some = NewStack()
+    some[].Push(2)
+    some[].Push(-4)
+    some[].Push(7)
+    some[].Swap()
+    check some.height == 3
+    check some.data[0] == 2
+    check some.data[1] == 7
+    check some.data[2] == -4
+    check some.data[3] == 0
+  test "Transfert":
+    var empty = NewStack()
+    var empty2 = NewStack()
+    empty[].Transfert(empty2[], 4)
+    check empty.height == 4
+    check empty2.height == 0
+    check empty.data[0] == 0
+    check empty.data[1] == 0
+    check empty.data[2] == 0
+    check empty.data[3] == 0
+    empty = NewStack()
+    var some = NewStack()
+    some[].Push(2)
+    empty[].Transfert(some[], 3)
+    check empty.height == 3
+    check some.height == 0
+    check empty.data[0] == 0
+    check empty.data[1] == 0
+    check empty.data[2] == 2
+    empty = NewStack()
+    var full = NewStack()
+    full[].Push(1)
+    full[].Push(2)
+    full[].Push(3)
+    empty[].Transfert(full[], 2)
+    check empty.height == 2
+    check full.height == 1
+    check full.data[0] == 1
+    check empty.data[0] == 2
+    check empty.data[1] == 3
+  test "Next":
+    var empty = NewStack()
+    check empty[].Next() == nil
+    var some = NewStack(next=empty)
+    check some[].Next() == empty