52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package hw04lrucache
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestList(t *testing.T) {
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t.Run("empty list", func(t *testing.T) {
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l := NewList()
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require.Equal(t, 0, l.Len())
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require.Nil(t, l.Front())
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require.Nil(t, l.Back())
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})
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t.Run("complex", func(t *testing.T) {
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l := NewList()
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l.PushFront(10) // [10]
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l.PushBack(20) // [10, 20]
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l.PushBack(30) // [10, 20, 30]
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require.Equal(t, 3, l.Len())
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middle := l.Front().Next // 20
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l.Remove(middle) // [10, 30]
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require.Equal(t, 2, l.Len())
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for i, v := range [...]int{40, 50, 60, 70, 80} {
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if i%2 == 0 {
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l.PushFront(v)
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} else {
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l.PushBack(v)
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}
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} // [80, 60, 40, 10, 30, 50, 70]
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require.Equal(t, 7, l.Len())
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require.Equal(t, 80, l.Front().Value)
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require.Equal(t, 70, l.Back().Value)
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l.MoveToFront(l.Front()) // [80, 60, 40, 10, 30, 50, 70]
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l.MoveToFront(l.Back()) // [70, 80, 60, 40, 10, 30, 50]
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elems := make([]int, 0, l.Len())
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for i := l.Front(); i != nil; i = i.Next {
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elems = append(elems, i.Value.(int))
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}
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require.Equal(t, []int{70, 80, 60, 40, 10, 30, 50}, elems)
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})
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}
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