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// Copyright 2021 Nick White.
// Use of this source code is governed by the GPLv3
// license that can be found in the LICENSE file.
package pipeline
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"rescribe.xyz/bookpipeline"
"strings"
"testing"
)
// TODO: use random file names so these tests can be safely
// run in parallel
// StrLog is a simple logger that saves to a string,
// so it can be printed out only when needed.
type StrLog struct {
log string
}
func (t *StrLog) Write(p []byte) (n int, err error) {
t.log += string(p)
return len(p), nil
}
type connection struct {
name string
c Pipeliner
}
// Test_download tests the download() function inside the pipeline
func Test_download(t *testing.T) {
var slog StrLog
vlog := log.New(&slog, "", 0)
var conns []connection
conns = append(conns, connection{name: "local", c: &bookpipeline.LocalConn{Logger: vlog}})
if !testing.Short() {
conns = append(conns, connection{name: "aws", c: &bookpipeline.AwsConn{Logger: vlog}})
}
cases := []struct {
dl string
contents []byte
process string
errs []error
} {
{"notpresent", []byte(""), "", []error{errors.New("no such file or directory"), errors.New("NoSuchKey: The specified key does not exist")}},
{"empty", []byte{}, "empty", []error{}},
{"justastring", []byte("I am just a basic string"), "justastring", []error{}},
}
for _, conn := range conns {
for _, c := range cases {
t.Run(fmt.Sprintf("%s/%s", conn.name, c.dl), func(t *testing.T) {
err := conn.c.Init()
if err != nil {
t.Fatalf("Could not initialise %s connection: %v\nLog: %s", conn.name, err, slog.log)
}
slog.log = ""
tempDir := filepath.Join(os.TempDir(), "pipelinetest")
err = os.MkdirAll(tempDir, 0700)
if err != nil && ! os.IsExist(err) {
t.Fatalf("Could not create temporary directory %s: %v\nLog: %s", tempDir, err, slog.log)
}
// create and upload test file
tempFile := filepath.Join(tempDir, "t")
err = ioutil.WriteFile(tempFile, c.contents, 0600)
if err != nil {
t.Fatalf("Could not create temporary file %s: %v\nLog: %s", tempFile, err, slog.log)
}
if c.dl != "notpresent" {
err = conn.c.Upload(conn.c.WIPStorageId(), c.dl, tempFile)
if err != nil {
t.Fatalf("Could not upload file %s: %v\nLog: %s", tempFile, err, slog.log)
}
}
err = os.Remove(tempFile)
if err != nil {
t.Fatalf("Could not remove temporary upload file %s: %v\nLog: %s", tempFile, err, slog.log)
}
// download
dlchan := make(chan string)
processchan := make(chan string)
errchan := make(chan error)
go download(dlchan, processchan, conn.c, tempDir, errchan, vlog)
dlchan <- c.dl
close(dlchan)
// check all is as expected
select {
case err = <-errchan:
if len(c.errs) == 0 {
t.Fatalf("Received an error when one was not expected, error: %v\nLog: %s", err, slog.log)
}
expectedErrFound := 0
for _, v := range c.errs {
if strings.Contains(err.Error(), v.Error()) {
expectedErrFound = 1
}
}
if expectedErrFound == 0 {
t.Fatalf("Received a different error than was expected, expected one of: %v, got %v\nLog: %s", c.errs, err, slog.log)
}
case process := <-processchan:
expected := tempDir + "/" + c.process
if expected != process {
t.Fatalf("Received a different addition to the process channel than was expected, expected: %v, got %v\nLog: %s", expected, process, slog.log)
}
}
if c.dl == "notpresent" {
return
}
tempFile = filepath.Join(tempDir, c.dl)
dled, err := ioutil.ReadFile(tempFile)
if err != nil {
t.Fatalf("Could not read downloaded file %s: %v\nLog: %s", tempFile, err, slog.log)
}
if !bytes.Equal(dled, c.contents) {
t.Fatalf("Downloaded file differs from expected, expected: '%s', got '%s'\nLog: %s", c.contents, dled, slog.log)
}
// cleanup
err = conn.c.DeleteObjects(conn.c.WIPStorageId(), []string{c.dl})
if err != nil {
t.Fatalf("Could not delete storage object used for test %s: %v\nLog: %s", c.dl, err, slog.log)
}
err = os.Remove(tempFile)
if err != nil {
t.Fatalf("Could not remove temporary download file %s: %v\nLog: %s", tempFile, err, slog.log)
}
err = os.Remove(tempDir)
if err != nil {
t.Fatalf("Could not remove temporary download directory %s: %v\nLog: %s", tempDir, err, slog.log)
}
})
}
}
}
// Test_up tests the up() function inside the pipeline
func Test_up(t *testing.T) {
var slog StrLog
vlog := log.New(&slog, "", 0)
var conns []connection
conns = append(conns, connection{name: "local", c: &bookpipeline.LocalConn{Logger: vlog}})
if !testing.Short() {
conns = append(conns, connection{name: "aws", c: &bookpipeline.AwsConn{Logger: vlog}})
}
cases := []struct {
ul string
contents []byte
process string
errs []error
} {
{"notpresent", []byte(""), "", []error{errors.New("no such file or directory"), errors.New("NoSuchKey: The specified key does not exist")}},
{"empty", []byte{}, "empty", []error{}},
{"justastring", []byte("I am just a basic string"), "justastring", []error{}},
}
for _, conn := range conns {
for _, c := range cases {
t.Run(fmt.Sprintf("%s/%s", conn.name, c.ul), func(t *testing.T) {
err := conn.c.Init()
if err != nil {
t.Fatalf("Could not initialise %s connection: %v\nLog: %s", conn.name, err, slog.log)
}
slog.log = ""
tempDir := filepath.Join(os.TempDir(), "pipelinetest")
err = os.MkdirAll(tempDir, 0700)
if err != nil && ! os.IsExist(err) {
t.Fatalf("Could not create temporary directory %s: %v\nLog: %s", tempDir, err, slog.log)
}
// create test file
tempFile := filepath.Join(tempDir, c.ul)
if c.ul != "notpresent" {
err = ioutil.WriteFile(tempFile, c.contents, 0600)
if err != nil {
t.Fatalf("Could not create temporary file %s: %v\nLog: %s", tempFile, err, slog.log)
}
}
// upload
ulchan := make(chan string)
donechan := make(chan bool)
errchan := make(chan error)
go up(ulchan, donechan, conn.c, "pipelinetest", errchan, vlog)
ulchan <- filepath.Join(tempDir, c.ul)
close(ulchan)
// check all is as expected
select {
case err = <-errchan:
if len(c.errs) == 0 {
t.Fatalf("Received an error when one was not expected, error: %v\nLog: %s", err, slog.log)
}
expectedErrFound := 0
for _, v := range c.errs {
if strings.Contains(err.Error(), v.Error()) {
expectedErrFound = 1
}
}
if expectedErrFound == 0 {
t.Fatalf("Received a different error than was expected, expected one of: %v, got %v\nLog: %s", c.errs, err, slog.log)
}
case <-donechan:
}
if c.ul == "notpresent" {
return
}
_, err = os.Stat(tempFile)
if os.IsExist(err) {
t.Fatalf("Uploaded file not removed as it should have been after uploading %s: %v\nLog: %s", tempFile, err, slog.log)
}
err = conn.c.Download(conn.c.WIPStorageId(), "pipelinetest/" + c.ul, tempFile)
if err != nil {
t.Fatalf("Could not download file %s: %v\nLog: %s", tempFile, err, slog.log)
}
dled, err := ioutil.ReadFile(tempFile)
if err != nil {
t.Fatalf("Could not read downloaded file %s: %v\nLog: %s", tempFile, err, slog.log)
}
if !bytes.Equal(dled, c.contents) {
t.Fatalf("Uploaded file differs from expected, expected: '%s', got '%s'\nLog: %s", c.contents, dled, slog.log)
}
// cleanup
err = conn.c.DeleteObjects(conn.c.WIPStorageId(), []string{"pipelinetest/" + c.ul})
if err != nil {
t.Fatalf("Could not delete storage object used for test %s: %v\nLog: %s", c.ul, err, slog.log)
}
err = os.Remove(tempFile)
if err != nil {
t.Fatalf("Could not remove temporary download file %s: %v\nLog: %s", tempFile, err, slog.log)
}
err = os.Remove(tempDir)
if err != nil {
t.Fatalf("Could not remove temporary download directory %s: %v\nLog: %s", tempDir, err, slog.log)
}
})
}
}
}
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