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file_sink_test.go
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file_sink_test.go
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package main
import (
"fmt"
"io/ioutil"
"os"
"testing"
"strings"
"time"
)
func TestFileSink(t *testing.T) {
var err error
var fs *FileSink
// pass an unknown file type, should fail
fs, err = NewFileSink("/tmp", 5, 100, time.Minute)
if err == nil {
t.Errorf("NewFileSink() should have failed")
}
// pass a non-existent path, should fail
fs, err = NewFileSink("/tmp33222", FILE_TYPE_CSV, 100, time.Minute)
if err == nil {
t.Errorf("NewFileSink() should have failed")
}
if err != nil && !os.IsNotExist(err) {
t.Errorf("expected a file not found error, got: %v", err)
}
// pass an existent, non-directory path, should fail
fs, err = NewFileSink("/etc/hosts", FILE_TYPE_CSV, 100, time.Minute)
if err == nil {
t.Errorf("NewFileSink() should have failed")
}
// pass an existent directory as path
fs, err = NewFileSink("/tmp", FILE_TYPE_CSV, 100, time.Minute)
if err != nil {
t.Errorf("NewFileSink() should have succeeded, got: %v", err)
}
if len(fs.fifo) != 0 {
t.Errorf("len(fs.fifo) should have been 0, got: %v", len(fs.fifo))
}
if cap(fs.fifo) != 100 {
t.Errorf("cap(fs.fifo) should have been 100, got: %v", cap(fs.fifo))
}
if fs.maxAge != 1 * time.Minute {
t.Errorf("expected fs.maxAge to be 1 * time.Minute, saw: %v", fs.maxAge)
}
return
}
func TestJsonFileSink(t *testing.T) {
var err error
var fs *FileSink
var file *os.File
var contents []byte
var path string
var entryCount uint
var accepted uint
// expected file path
path = fmt.Sprintf("/tmp/%s.json", time.Now().UTC().Format("2006-01-02"))
// remvoe the test file to cleanup after ourselves
defer os.Remove(path)
// pass an existent directory as path
fs, err = NewFileSink("/tmp", FILE_TYPE_JSON, 2, 100 * time.Millisecond)
if err != nil {
t.Errorf("NewFileSink() should have succeeded, got: %v", err)
}
if cap(fs.fifo) != 2 {
t.Errorf("cap(fs.fifo) should have been 2, got: %v", cap(fs.fifo))
}
// save a few points until the fifo is full
accepted = fs.Save([]*Point{
{
Timestamp: time.Unix(1569150729, 0),
Label: "sensor0.temperature",
Value: 18.7,
},
{
Timestamp: time.Unix(1569150729, 0),
Label: "sensor0.humidity",
Value: 54,
},
{
Timestamp: time.Unix(1569150729, 1000000),
Label: "sensor1.temperature",
Value: -17.1,
},
{
Timestamp: time.Unix(1569150729, 2000000),
Label: "sensor1.humidity",
Value: 60,
},
})
if accepted != 2 {
t.Errorf("only 2 points should have been accepted, actual: %v", accepted)
}
// give enough time for the writer goroutine to flush to disk
time.Sleep(200 * time.Millisecond)
if len(fs.fifo) != 0 {
t.Errorf("fs.fifo should be empty, saw: %v", len(fs.fifo))
}
// attempt to open the file
file, err = os.Open(path)
if err != nil {
t.Errorf("%s should have existed, got: %v", path, err)
}
contents, err = ioutil.ReadAll(file)
if err != nil {
t.Errorf("failed to read file: %v", err)
}
file.Close()
for idx, line := range strings.Split(string(contents), "\n") {
switch idx {
case 0:
if line != "{\"timestamp\":1569150729000,\"label\":\"sensor0.temperature\",\"value\":18.7}" {
t.Errorf("unexpected line '%s'", line)
}
case 1:
if line != "{\"timestamp\":1569150729000,\"label\":\"sensor0.humidity\",\"value\":54}" {
t.Errorf("unexpected line '%s'", line)
}
case 2:
if line != "" {
t.Errorf("unexpected line '%s'", line)
}
default:
t.Errorf("extra line #%d: '%s'", idx, line)
}
entryCount++
}
// counting the final empty token (after the last \n), we should have read 3 lines
if entryCount != 3 {
t.Errorf("expected 3 lines, saw: %v", entryCount)
}
// add another point
accepted = fs.Save([]*Point{
{
Timestamp: time.Unix(1569150729, 2000000),
Label: "sensor1.humidity",
Value: 60,
},
})
if accepted != 1 {
t.Errorf("1 point should have been accepted, actual: %v", accepted)
}
// give enough time for the writer goroutine to flush to disk
time.Sleep(200 * time.Millisecond)
if len(fs.fifo) != 0 {
t.Errorf("fs.fifo should be empty, saw: %v", len(fs.fifo))
}
// attempt to re-open the file
file, err = os.Open(path)
if err != nil {
t.Errorf("%s should have existed, got: %v", path, err)
}
contents, err = ioutil.ReadAll(file)
if err != nil {
t.Errorf("failed to read file: %v", err)
}
file.Close()
entryCount = 0
for idx, line := range strings.Split(string(contents), "\n") {
switch idx {
case 0:
if line != "{\"timestamp\":1569150729000,\"label\":\"sensor0.temperature\",\"value\":18.7}" {
t.Errorf("unexpected line '%s'", line)
}
case 1:
if line != "{\"timestamp\":1569150729000,\"label\":\"sensor0.humidity\",\"value\":54}" {
t.Errorf("unexpected line '%s'", line)
}
case 2:
if line != "{\"timestamp\":1569150729002,\"label\":\"sensor1.humidity\",\"value\":60}" {
t.Errorf("unexpected line '%s'", line)
}
case 3:
if line != "" {
t.Errorf("unexpected line '%s'", line)
}
default:
t.Errorf("extra line #%d: '%s'", idx, line)
}
entryCount++
}
if entryCount != 4 {
t.Errorf("expected 4 lines, saw: %v", entryCount)
}
return
}
func TestCSVFileSink(t *testing.T) {
var err error
var fs *FileSink
var file *os.File
var contents []byte
var path string
var entryCount uint
var accepted uint
// expected file path
path = fmt.Sprintf("/tmp/%s.csv", time.Now().UTC().Format("2006-01-02"))
// remvoe the test file to cleanup after ourselves
defer os.Remove(path)
// pass an existent directory as path
fs, err = NewFileSink("/tmp", FILE_TYPE_CSV, 2, 100 * time.Millisecond)
if err != nil {
t.Errorf("NewFileSink() should have succeeded, got: %v", err)
}
if cap(fs.fifo) != 2 {
t.Errorf("cap(fs.fifo) should have been 2, got: %v", cap(fs.fifo))
}
// save a few points until the fifo is full
accepted = fs.Save([]*Point{
{
Timestamp: time.Unix(1569150729, 0),
Label: "sensor0.temperature",
Value: 18.7,
},
{
Timestamp: time.Unix(1569150729, 0),
Label: "sensor0.humidity",
Value: 54,
},
{
Timestamp: time.Unix(1569150729, 1000000),
Label: "sensor1.temperature",
Value: -17.1,
},
{
Timestamp: time.Unix(1569150729, 2000000),
Label: "sensor1.humidity",
Value: 60,
},
})
if accepted != 2 {
t.Errorf("only 2 points should have been accepted, actual: %v", accepted)
}
// give enough time for the writer goroutine to flush to disk
time.Sleep(200 * time.Millisecond)
if len(fs.fifo) != 0 {
t.Errorf("fs.fifo should be empty, saw: %v", len(fs.fifo))
}
// attempt to open the file
file, err = os.Open(path)
if err != nil {
t.Errorf("%s should have existed, got: %v", path, err)
}
contents, err = ioutil.ReadAll(file)
if err != nil {
t.Errorf("failed to read file: %v", err)
}
file.Close()
for idx, line := range strings.Split(string(contents), "\n") {
switch idx {
case 0:
if line != "1569150729000,sensor0.temperature,18.7" {
t.Errorf("unexpected line '%s'", line)
}
case 1:
if line != "1569150729000,sensor0.humidity,54" {
t.Errorf("unexpected line '%s'", line)
}
case 2:
if line != "" {
t.Errorf("unexpected line '%s'", line)
}
default:
t.Errorf("extra line #%d", idx)
}
entryCount++
}
if entryCount != 3 {
t.Errorf("expected 3 lines, saw: %v", entryCount)
}
// add another point
accepted = fs.Save([]*Point{
{
Timestamp: time.Unix(1569150729, 2000000),
Label: "sensor1.humidity",
Value: 69,
},
})
if accepted != 1 {
t.Errorf("1 point should have been accepted, actual: %v", accepted)
}
// give enough time for the writer goroutine to flush to disk
time.Sleep(200 * time.Millisecond)
if len(fs.fifo) != 0 {
t.Errorf("fs.fifo should be empty, saw: %v", len(fs.fifo))
}
// attempt to re-open the file
file, err = os.Open(path)
if err != nil {
t.Errorf("%s should have existed, got: %v", path, err)
}
contents, err = ioutil.ReadAll(file)
if err != nil {
t.Errorf("failed to read file: %v", err)
}
file.Close()
entryCount = 0
for idx, line := range strings.Split(string(contents), "\n") {
switch idx {
case 0:
if line != "1569150729000,sensor0.temperature,18.7" {
t.Errorf("unexpected line '%s'", line)
}
case 1:
if line != "1569150729000,sensor0.humidity,54" {
t.Errorf("unexpected line '%s'", line)
}
case 2:
if line != "1569150729002,sensor1.humidity,69" {
t.Errorf("unexpected line '%s'", line)
}
case 3:
if line != "" {
t.Errorf("unexpected line '%s'", line)
}
default:
t.Errorf("extra line #%d: '%s'", idx, line)
}
entryCount++
}
if entryCount != 4 {
t.Errorf("expected 4 lines, saw: %v", entryCount)
}
return
}