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// CookieJar - A contestant's algorithm toolbox
// Copyright (c) 2013 Peter Szilagyi. All rights reserved.
//
// CookieJar is dual licensed: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// The toolbox is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// Alternatively, the CookieJar toolbox may be used in accordance with the terms
// and conditions contained in a signed written agreement between you and the
// author(s).
package prque
import (
"math/rand"
"sort"
"testing"
)
func TestSstack(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), rand.Float32()}
}
stack := newSstack()
for rep := 0; rep < 2; rep++ {
// Push all the data into the stack, pop out every second
secs := []*item{}
for i := 0; i < size; i++ {
stack.Push(data[i])
if i%2 == 0 {
secs = append(secs, stack.Pop().(*item))
}
}
rest := []*item{}
for stack.Len() > 0 {
rest = append(rest, stack.Pop().(*item))
}
// Make sure the contents of the resulting slices are ok
for i := 0; i < size; i++ {
if i%2 == 0 && data[i] != secs[i/2] {
t.Errorf("push/pop mismatch: have %v, want %v.", secs[i/2], data[i])
}
if i%2 == 1 && data[i] != rest[len(rest)-i/2-1] {
t.Errorf("push/pop mismatch: have %v, want %v.", rest[len(rest)-i/2-1], data[i])
}
}
}
}
func TestSstackSort(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), float32(i)}
}
// Push all the data into the stack
stack := newSstack()
for _, val := range data {
stack.Push(val)
}
// Sort and pop the stack contents (should reverse the order)
sort.Sort(stack)
for _, val := range data {
out := stack.Pop()
if out != val {
t.Errorf("push/pop mismatch after sort: have %v, want %v.", out, val)
}
}
}
func TestSstackReset(t *testing.T) {
// Create some initial data
size := 16 * blockSize
data := make([]*item, size)
for i := 0; i < size; i++ {
data[i] = &item{rand.Int(), rand.Float32()}
}
stack := newSstack()
for rep := 0; rep < 2; rep++ {
// Push all the data into the stack, pop out every second
secs := []*item{}
for i := 0; i < size; i++ {
stack.Push(data[i])
if i%2 == 0 {
secs = append(secs, stack.Pop().(*item))
}
}
// Reset and verify both pulled and stack contents
stack.Reset()
if stack.Len() != 0 {
t.Errorf("stack not empty after reset: %v", stack)
}
for i := 0; i < size; i++ {
if i%2 == 0 && data[i] != secs[i/2] {
t.Errorf("push/pop mismatch: have %v, want %v.", secs[i/2], data[i])
}
}
}
}
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