func TestStackPush(t *testing.T) {
stack := stack.NewStack()
stack.Push(42)
if stack.Count() != 1 {
t.Error("expected stack count to be: 1")
}
stack.Push(2)
if stack.Count() != 2 {
t.Error("expected stack count to be: 2")
}
}
func TestStackPop(t *testing.T) {
stack := stack.NewStack()
stack.Push(42)
stack.Push(2)
var v int
var empty bool
v, empty = stack.Pop()
if e := 2; v != e {
t.Errorf("expected stack to pop the value: %d, got %d", e, v)
}
if empty != false {
t.Error("expected stack to not be empty.")
}
if e := 1; stack.Count() != e {
t.Errorf("expected stack count to be: %d, got %d", e, v)
}
v, empty = stack.Pop()
if e := 42; v != e {
t.Errorf("expected stack to pop the value: %d, got %d", e, v)
}
if empty != true {
t.Error("expected stack to be empty.")
}
if e := 0; stack.Count() != e {
t.Errorf("expected stack count to be: %d, got %d", e, v)
}
stack.Push(100)
v, empty = stack.Pop()
if e := 100; v != e {
t.Errorf("expected stack to pop the value: %d, got %d", e, v)
}
if empty != true {
t.Error("expected stack to be empty.")
}
if e := 0; stack.Count() != e {
t.Errorf("expected stack count to be: %d, got %d", e, v)
}
v, empty = stack.Pop()
if e := 0; v != e {
t.Errorf("expected stack to pop the value: %d, got %d", e, v)
}
if empty != true {
t.Error("expected stack to be empty.")
}
if e := 0; stack.Count() != e {
t.Errorf("expected stack count to be: %d, got %d", e, v)
}
}
func TestManyPushes(t *testing.T) {
count := 10000
stack := stack.NewStack()
for i := 0; i < count; i++ {
stack.Push(i + 1)
}
if a := stack.Count(); a != count {
t.Errorf("Expected stack count to be %d, got %d", count, a)
}
for e := count; e > 0; e-- {
if a, _ := stack.Pop(); a != e {
t.Errorf("Expected stack to pop %d, got %d", e, a)
}
}
}