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package stack
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestClear(t *testing.T) {
s := NewStack()
s.Clear()
require.Equal(t, 0, s.height)
}
func TestDupicate(t *testing.T) {
s := NewStack()
s2 := NewStack()
s.Duplicate()
require.Equal(t, s2.height, s.height)
s.Push(12)
s.Duplicate()
s2.Push(12)
s2.Push(12)
require.Equal(t, s2.height, s.height)
require.Equal(t, s2.data, s.data)
}
func TestPop(t *testing.T) {
s := NewStack()
v := s.Pop()
require.Equal(t, 0, v)
s.Push(12)
s.Push(14)
v = s.Pop()
require.Equal(t, 14, v)
v = s.Pop()
require.Equal(t, 12, v)
v = s.Pop()
require.Equal(t, 0, v)
}
func TestPush(t *testing.T) {
s := NewStack()
for i := 0; i < 32; i++ {
s.Push(i)
}
require.Equal(t, 32, s.size)
s.Push(-1)
require.Equal(t, 64, s.size)
}
func TestSwap(t *testing.T) {
s := NewStack()
s2 := NewStack()
s.Swap()
s2.Push(0)
s2.Push(0)
require.Equal(t, s2, s)
s.Clear()
s.Push(1)
s.Swap()
s2.Clear()
s2.Push(1)
s2.Push(0)
require.Equal(t, s2, s)
s.Clear()
s.Push(1)
s.Push(2)
s2.Clear()
s2.Push(2)
s2.Push(1)
s.Swap()
require.Equal(t, s2, s)
}
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