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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package priorityqueue
import (
"context"
"sync"
"testing"
)
func TestPriorityQueue(t *testing.T) {
var results []string
wg := sync.WaitGroup{}
pq := New(3, 2)
wg.Add(1)
go pq.Run(context.Background(), func(v interface{}) {
results = append(results, v.(string))
wg.Done()
})
pq.Push("2.0", 2)
wg.Wait()
if results[0] != "2.0" {
t.Errorf("expected first result %q, got %q", "2.0", results[0])
}
Loop:
for i, tc := range []struct {
priorities []int
values []string
results []string
errors []error
}{
{
priorities: []int{0},
values: []string{""},
results: []string{""},
},
{
priorities: []int{0, 1},
values: []string{"0.0", "1.0"},
results: []string{"1.0", "0.0"},
},
{
priorities: []int{1, 0},
values: []string{"1.0", "0.0"},
results: []string{"1.0", "0.0"},
},
{
priorities: []int{0, 1, 1},
values: []string{"0.0", "1.0", "1.1"},
results: []string{"1.0", "1.1", "0.0"},
},
{
priorities: []int{0, 0, 0},
values: []string{"0.0", "0.0", "0.1"},
errors: []error{nil, nil, ErrContention},
},
} {
var results []string
wg := sync.WaitGroup{}
pq := New(3, 2)
wg.Add(len(tc.values))
for j, value := range tc.values {
err := pq.Push(value, tc.priorities[j])
if tc.errors != nil && err != tc.errors[j] {
t.Errorf("expected push error %v, got %v", tc.errors[j], err)
continue Loop
}
if err != nil {
continue Loop
}
}
go pq.Run(context.Background(), func(v interface{}) {
results = append(results, v.(string))
wg.Done()
})
wg.Wait()
for k, result := range tc.results {
if results[k] != result {
t.Errorf("test case %v: expected %v element %q, got %q", i, k, result, results[k])
}
}
}
}
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