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package deque
import (
"fmt"
"testing"
"github.com/bradenaw/juniper/internal/fuzz"
"github.com/bradenaw/juniper/internal/require2"
"github.com/bradenaw/juniper/iterator"
)
func FuzzDeque(f *testing.F) {
f.Fuzz(func(t *testing.T, b []byte) {
var oracle []byte
var deque Deque[byte]
fuzz.Operations(
b,
func() {
require2.Equal(t, len(oracle), deque.Len())
t.Logf(" len = %d", len(oracle))
t.Logf(" oracle state: %#v", oracle)
t.Logf(" deque state: (len(r.a) = %d) %#v", len(deque.a), deque)
}, // check
func(x byte) {
t.Logf("PushFront(%#v)", x)
deque.PushFront(x)
oracle = append([]byte{x}, oracle...)
},
func(x byte) {
t.Logf("PushBack(%#v)", x)
deque.PushBack(x)
oracle = append(oracle, x)
},
func() {
if len(oracle) == 0 {
return
}
oracleItem := oracle[0]
t.Logf("PopFront() -> %#v", oracleItem)
oracle = oracle[1:]
dequeItem := deque.PopFront()
require2.Equal(t, oracleItem, dequeItem)
},
func() {
if len(oracle) == 0 {
return
}
oracleItem := oracle[len(oracle)-1]
t.Logf("PopBack() -> %#v", oracleItem)
oracle = oracle[:len(oracle)-1]
dequeItem := deque.PopBack()
require2.Equal(t, oracleItem, dequeItem)
},
func() {
if len(oracle) == 0 {
t.Log("Front() should panic")
func() {
defer func() { recover() }()
deque.Front()
t.FailNow()
}()
return
}
oracleItem := oracle[0]
t.Logf("Front() -> %#v", oracleItem)
dequeItem := deque.Front()
require2.Equal(t, oracleItem, dequeItem)
},
func() {
if len(oracle) == 0 {
t.Log("Back() should panic")
func() {
defer func() { recover() }()
deque.Back()
t.FailNow()
}()
return
}
oracleItem := oracle[len(oracle)-1]
t.Logf("Back() -> %#v", oracleItem)
dequeItem := deque.Back()
require2.Equal(t, oracleItem, dequeItem)
},
func(i int) {
if i < 0 || i >= len(oracle) {
t.Logf("Item(%d) should panic", i)
func() {
defer func() { recover() }()
deque.Item(i)
t.FailNow()
}()
return
}
oracleItem := oracle[i]
t.Logf("Item(%d) -> %#v", i, oracleItem)
dequeItem := deque.Item(i)
require2.Equal(t, oracleItem, dequeItem)
},
func(i int, x byte) {
if i < 0 || i >= len(oracle) {
t.Logf("Set(%d, x) should panic", i)
func() {
defer func() { recover() }()
deque.Item(i)
t.FailNow()
}()
return
}
t.Logf("Set(%d, %d)", i, x)
oracle[i] = x
deque.Set(i, x)
},
func() {
t.Log("Iterate()")
oracleAll := oracle
if len(oracleAll) == 0 {
oracleAll = nil
}
dequeAll := iterator.Collect(deque.Iterate())
if len(dequeAll) == 0 {
dequeAll = nil
}
require2.SlicesEqual(t, oracleAll, dequeAll)
},
func(n byte) {
t.Logf("Grow(%d)", n)
deque.Grow(int(n))
},
)
})
}
func Example() {
var deque Deque[string]
deque.PushFront("a")
deque.PushFront("b")
fmt.Println(deque.PopFront())
deque.PushBack("c")
deque.PushBack("d")
fmt.Println(deque.PopBack())
fmt.Println(deque.PopFront())
// Output:
// b
// d
// a
}
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