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metrics_test.go
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metrics_test.go
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// Copyright (c) 2016, M Bogus.
// This source file is part of the KUBE-AMQP-AUTOSCALE open source project
// Licensed under Apache License v2.0
// See LICENSE file for license information
package main
import (
"io/ioutil"
"math/rand"
"os"
"path"
"strconv"
"testing"
"time"
)
func TestDbPathMemory(t *testing.T) {
db, err := dbPath("", ":memory:")
if err != nil {
t.Fatal(err)
}
if got, want := db, ":memory:"; got != want {
t.Errorf("Expected dbPath='%s', got: '%s'", want, got)
}
}
func TestDbPathNoFileDir(t *testing.T) {
_, err := dbPath("", "")
if err == nil {
t.Fatal("Error expected")
}
if got, want := err.Error(), "missing directory and/or filename for the metrics database"; got != want {
t.Errorf("Expected dbPath='%s', got: '%s'", want, got)
}
}
func TestDbPathTempFile(t *testing.T) {
file, err := ioutil.TempFile(os.TempDir(), "db")
if err != nil {
t.Fatal(err)
}
defer os.Remove(file.Name())
db, err := dbPath(path.Dir(file.Name()), path.Base(file.Name()))
if err != nil {
t.Fatal(err)
}
if got, want := db, file.Name(); got != want {
t.Errorf("Expected dbPath='%s', got: '%s'", want, got)
}
}
func TestDbPathNewFile(t *testing.T) {
fname := strconv.Itoa(rand.Int())
db, err := dbPath(os.TempDir(), fname)
if err != nil {
t.Fatal(err)
}
if got, want := db, path.Join(os.TempDir(), fname); got != want {
t.Errorf("Expected dbPath='%s', got: '%s'", want, got)
}
}
func TestCreateTable(t *testing.T) {
testDBFile := ":memory:"
db, err := connectToDB(&testDBFile)
if err != nil {
t.Fatal(err)
}
err = createTable(db)
if err != nil {
t.Fatal(err)
}
stmt, err := db.Prepare(`SELECT unix_secs, q_len FROM timeline`)
if err != nil {
t.Fatal(err)
}
defer stmt.Close()
rows, err := stmt.Query()
if err != nil {
t.Fatal(err)
}
defer rows.Close()
if got, want := rows.Next(), false; got != want {
t.Errorf("Expected has rows='%v', got: '%v'", want, got)
}
}
func TestUpdateMetrics(t *testing.T) {
testDBFile := ":memory:"
db, err := connectToDB(&testDBFile)
if err != nil {
t.Fatal(err)
}
err = createTable(db)
if err != nil {
t.Fatal(err)
}
duration := 2
for i := 0; i < 30; i++ {
updateMetrics(db, i, duration)
time.Sleep(100 * time.Millisecond)
}
stmt, err := db.Prepare(`SELECT MIN(unix_secs) FROM timeline`)
if err != nil {
t.Fatal(err)
}
defer stmt.Close()
row := stmt.QueryRow()
var minTime int64
row.Scan(&minTime)
if got, want := minTime, time.Now().Unix(); got+int64(duration) > want {
t.Errorf("Expected min date='%v', got: '%v'", want, got)
}
}
func TestGetMetrics(t *testing.T) {
testDBFile := ":memory:"
db, err := connectToDB(&testDBFile)
if err != nil {
t.Fatal(err)
}
err = createTable(db)
if err != nil {
t.Fatal(err)
}
for i := 0; i < 3; i++ {
updateMetrics(db, i, 6)
time.Sleep(1 * time.Second)
}
stats, err := getMetrics(db, 6, 1)
if err != nil {
t.Fatal(err)
}
if got, want := stats.Count, 3; got != want {
t.Errorf("Expected count='%v', got: '%v'", want, got)
}
if got, want := stats.Average, 1.0; got != want {
t.Errorf("Expected average='%v', got: '%v'", want, got)
}
if got, want := stats.Coverage, 0.5; got != want {
t.Errorf("Expected coverage='%v', got: '%v'", want, got)
}
}