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stack_test.go
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114 lines (78 loc) · 1.58 KB
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package stack_test
import (
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
"github.com/thisguycodes/modelstack/internal/stack"
)
func TestPushPeekPop(t *testing.T) {
t.Parallel()
s := stack.New[int]()
i := rand.Int()
s.Push(i)
assert.Equal(t, i, s.Peek().Value)
assert.Equal(t, i, s.Pop().Value)
}
func TestSwapPeek(t *testing.T) {
t.Parallel()
s := stack.New[int]()
i := rand.Int()
j := rand.Int()
s.Push(i)
s.Swap(j)
assert.Equal(t, j, s.Peek().Value)
}
func TestEmptyPop(t *testing.T) {
t.Parallel()
s := stack.New[int]()
var n *stack.Element[int]
assert.Equal(t, n, s.Pop())
}
func TestEmptyPeek(t *testing.T) {
t.Parallel()
s := stack.New[int]()
var n *stack.Element[int]
assert.Equal(t, n, s.Peek())
}
func TestPopPop(t *testing.T) {
t.Parallel()
s := stack.New[int]()
i := rand.Int()
j := rand.Int()
s.Push(i)
s.Push(j)
s.Pop()
assert.Equal(t, i, s.Pop().Value)
}
func TestPopPopCopySafe(t *testing.T) {
t.Parallel()
s := stack.New[int]()
i := rand.Int()
j := rand.Int()
s.Push(i)
s.Push(j)
cop := s
assert.Equal(t, j, cop.Pop().Value)
assert.Equal(t, i, s.Pop().Value)
}
func TestPushPopCopySafe(t *testing.T) {
t.Parallel()
s := stack.New[int]()
i := rand.Int()
j := rand.Int()
cop := s
s.Push(i)
cop.Push(j)
assert.Equal(t, j, s.Pop().Value)
assert.Equal(t, i, cop.Pop().Value)
}
func TestNewPreSeed(t *testing.T) {
t.Parallel()
i := rand.Int()
j := rand.Int()
k := rand.Int()
s := stack.New(i, j, k)
assert.Equal(t, i, s.Pop().Value)
assert.Equal(t, j, s.Pop().Value)
assert.Equal(t, k, s.Pop().Value)
}