structure/priority_queue/priority_queue_test.go

package pqueue

import (
	"testing"

	"474420502.top/eson/structure/compare"
)

func TestQueuePush(t *testing.T) {
	pq := New(compare.Int)
	for _, v := range []int{32, 10, 53, 78, 90, 1, 4} {
		pq.Push(v)
		if v, ok := pq.Top(); ok {
		} else {
			t.Error(v)
		}
	}

	if v, ok := pq.Top(); ok {
		if v != 90 {
			t.Error(v)
		}
	} else {
		t.Error(v)
	}

}

func TestQueuePop(t *testing.T) {
	pq := New(compare.Int)
	for _, v := range []int{32, 10, 53, 78, 90, 1, 4} {
		pq.Push(v)
		if v, ok := pq.Top(); ok {
		} else {
			t.Error(v)
		}
	}

	l := []int{90, 78, 53, 32, 10, 4, 1}
	for _, lv := range l {
		if v, ok := pq.Pop(); ok {
			if v != lv {
				t.Error(v)
			}
		} else {
			t.Error(v)
		}
	}

	if v, ok := pq.Pop(); ok {
		t.Error(v)
	}
}

func TestQueueGet(t *testing.T) {
	pq := New(compare.Int)
	l := []int{32, 10, 53, 78, 90, 1, 4}
	for _, v := range l {
		pq.Push(v)
	}

	if v, ok := pq.Get(0); ok {
		t.Error(v)
	}

	if v, ok := pq.Get(70); ok {
		t.Error(v)
	}

	for _, v := range l {
		if gv, ok := pq.Get(v); ok {
			if gv != v {
				t.Error("Get value is error, value is", gv)
			}
		}
	}

}

func TestQueueIndex(t *testing.T) {
	pq := New(compare.Int)
	for _, v := range []int{32, 10, 53, 78, 90, 1, 4} {
		pq.Push(v)
	}

	l := []int{90, 78, 53, 32, 10, 4, 1}
	for i, lv := range l {

		if v, ok := pq.Index(len(l) - i - 1); ok {
			if v != l[len(l)-i-1] {
				t.Error(v)
			}
		} else {
			t.Error(i, "index is not exist")
		}

		if v, ok := pq.Index(i); ok {
			if v != lv {
				t.Error(v)
			}
		} else {
			t.Error(i, "index is not exist")
		}
	}

	if v, ok := pq.Index(-1); ok {
		if v != 1 {
			t.Error(v)
		}
	} else {
		t.Error("-1 index is not exist")
	}

	if v, ok := pq.Index(pq.Size()); ok {
		t.Error("index is exits", pq.Size(), v)
	}

	if v, ok := pq.Index(pq.Size() - 1); !ok {
		if v != 1 {
			t.Error("the last value is 1 not is ", v)
		}
	}

	if v, ok := pq.Index(-10); ok {
		t.Error("-10 index is exits", v)
	}
}

func BenchmarkQueueGet(b *testing.B) {

	l := loadTestData()

	pq := New(compare.Int)
	for _, v := range l {
		pq.Push(v)
	}

	execCount := 5
	b.N = len(l) * execCount

	b.ResetTimer()
	b.StartTimer()

ALL:
	for i := 0; i < execCount; i++ {
		for _, v := range l {
			if gv, ok := pq.Get(v); !ok {
				b.Error(gv)
				break ALL
			}
		}
	}
}

func BenchmarkQueueIndex(b *testing.B) {

	l := loadTestData()

	pq := New(compare.Int)
	for _, v := range l {
		pq.Push(v)
	}

	execCount := 2
	b.N = len(l) * execCount

	b.ResetTimer()
	b.StartTimer()

ALL:
	for i := 0; i < execCount; i++ {
		for idx := range l {
			if v, ok := pq.Index(idx); !ok {
				b.Error(v)
				break ALL
			}
		}
	}
}

func BenchmarkPriorityPush(b *testing.B) {

	l := loadTestData()
	execCount := 5
	b.N = len(l) * execCount

	b.ResetTimer()
	b.StartTimer()

	for i := 0; i < execCount; i++ {
		pq := New(compare.Int)
		for _, v := range l {
			pq.Push(v)
		}
	}
}

func BenchmarkPriorityPop(b *testing.B) {

	l := loadTestData()

	pq := New(compare.Int)
	for _, v := range l {
		pq.Push(v)
	}

	b.N = len(l)
	b.ResetTimer()
	b.StartTimer()

	for i := 0; i < b.N; i++ {
		pq.Pop()
	}
}