/
concurrency_test.go
443 lines (424 loc) · 13.3 KB
/
concurrency_test.go
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package main
import (
"bufio"
"fmt"
"net"
"runtime"
"strconv"
"strings"
"testing"
"time"
)
// Simple serial check of getting and setting
func TestTCPSimple(t *testing.T) {
runtime.GOMAXPROCS(1005)
go serverMain()
time.Sleep(1 * time.Second) // one second is enough time for the server to start
name := "hi.txt"
contents := "bye"
exptime := 300000
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
scanner := bufio.NewScanner(conn)
// Write a file
fmt.Fprintf(conn, "write %v %v %v\r\n%v\r\n", name, len(contents), exptime, contents)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
version, err := strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
fmt.Fprintf(conn, "read %v\r\n", name) // try a read now
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
expect(t, arr[1], fmt.Sprintf("%v", version)) // expect only accepts strings, convert int version to string
expect(t, arr[2], fmt.Sprintf("%v", len(contents)))
scanner.Scan()
expect(t, contents, scanner.Text())
}
// Test syntax of write command
func TestSyntax(t *testing.T) {
name := "hi.txt"
contents := "bye"
exptime := 300000
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
scanner := bufio.NewScanner(conn)
// Write a file
fmt.Fprintf(conn, "write ab %v %v\r\n%v\r\n", name, exptime, contents)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "ERR_CMD_ERR")
conn, err = net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing frame
}
scanner = bufio.NewScanner(conn)
fmt.Fprintf(conn, "read %v\r\n", name) // try a read now
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expect(t, contents, scanner.Text())
}
//Test delete - write a file, read it, delete it, then attempt to read it again
func TestDelete(t *testing.T) {
name := "f2.txt"
contents := "bye\r\nprerna"
exptime := 300
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
scanner := bufio.NewScanner(conn)
// Write a file
fmt.Fprintf(conn, "write %v %v %v\r\n%v\r\n", name, len(contents), exptime, contents)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
version, err := strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
fmt.Fprintf(conn, "read %v\r\n", name) // try a read now
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
expect(t, arr[1], fmt.Sprintf("%v", version)) // expect only accepts strings, convert int version to string
expect(t, arr[2], fmt.Sprintf("%v", len(contents)))
scanner.Scan()
expect(t, "bye", scanner.Text())
scanner.Scan()
expect(t, "prerna", scanner.Text())
fmt.Fprintf(conn, "delete %v\r\n", name)
scanner.Scan() // read first line
resp = scanner.Text() // extract the text from the buffer
// arr = strings.Split(resp, " ") // split into OK and <version>
expect(t, resp, "OK")
fmt.Fprintf(conn, "read %v\r\n", name)
scanner.Scan()
expect(t, scanner.Text(), "ERR_FILE_NOT_FOUND")
}
// Test behavior of system with 10 clients writing simultaneously to a file
func TestWriteConcurrency(t *testing.T) {
name := "f1.txt"
ch := make(chan bool)
for i := 1; i <= 10; i++ {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
scanner := bufio.NewScanner(conn)
go writeClient(conn, scanner, i, t, ch)
}
// time.Sleep(1 * time.Second)
for i := 1; i <= 10; i++ {
<-ch
}
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
// fmt.Println("Here")
}
scanner := bufio.NewScanner(conn)
fmt.Fprintf(conn, "read %v\r\n", name) // try a read now
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expectOptions(t, scanner.Text())
}
// Test behavior of cas and write together attempted by two clients
func TestCasWrite(t *testing.T) {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error())
}
scanner := bufio.NewScanner(conn)
name := "f1.txt"
fmt.Fprintf(conn, "read %v\r\n", name)
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
ver := arr[1]
ch := make(chan bool)
go write(t, name, ch)
go cas(t, name, ver, ch)
<-ch
<-ch
fmt.Fprintf(conn, "read %v\r\n", name)
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expect(t, scanner.Text(), "2")
}
// Test system behavior when 5 clients simultaneously attempt cas to a file
func TestCasConcurrency(t *testing.T) {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
// t.Error(err.Error())
t.Error("Connection failure")
}
scanner := bufio.NewScanner(conn)
name := "f1.txt"
val := 1
for i := 1; i <= 10; i++ {
fmt.Fprintf(conn, "read %v\r\n", name)
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
scanner.Text()
ver := arr[1]
ch := make(chan bool)
for x := 1; x <= 5; x++ {
go casVal(t, name, ver, ch, val)
val++
}
for x := 1; x <= 5; x++ {
<-ch
}
}
fmt.Fprintf(conn, "read %v\r\n", name)
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expectConcCas(t, scanner.Text())
}
//Test read concurrency - 3 clients read the same value and then try to update. Their writes are concurrent.
func TestReadConcurrency(t *testing.T) {
name := "f3.txt"
contents := "0"
exptime := 300000
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
scanner := bufio.NewScanner(conn)
// Write a file
fmt.Fprintf(conn, "write %v %v %v\r\n%v\r\n", name, len(contents), exptime, contents)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
_, err = strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
ch := make(chan bool)
for i := 1; i <= 3; i++ {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
go Readandwrite(conn, i, t, ch)
}
// wait for goroutines to finish
for x:=1; x<=3; x++ {
<-ch
}
//attempt read
fmt.Fprintf(conn, "read %v\r\n", name) // read the file
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expect(t, "5", scanner.Text())
for i := 1; i <= 3; i++ {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error()) // report error through testing framework
}
go Readandwritediff(conn, i, t, ch)
}
// wait for goroutines to finish
for x:=1; x<=3; x++ {
<-ch
}
//attempt read
fmt.Fprintf(conn, "read %v\r\n", name) // read the file
scanner.Scan()
arr = strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
expectwr(t, scanner.Text())
}
//------------------------------------------------------------------------------------------------------------------------------
func Readandwrite(conn net.Conn, i int, t *testing.T, ch chan bool){
name := "f3.txt"
scanner := bufio.NewScanner(conn)
fmt.Fprintf(conn, "read %v\r\n", name) // read the file
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
contents:=strings.Split(scanner.Text()," ")
val,_ := strconv.Atoi(contents[0])
time.Sleep(1 * time.Second) // sleep for 2 seconds
//now attempt write
content:= strconv.Itoa(val+5)
fmt.Fprintf(conn, "write %v %v\r\n%v\r\n", name, len(content), content)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr = strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
_, err := strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
ch<-true
}
func Readandwritediff(conn net.Conn, i int, t *testing.T, ch chan bool){
name := "f3.txt"
scanner := bufio.NewScanner(conn)
fmt.Fprintf(conn, "read %v\r\n", name) // read the file
scanner.Scan()
arr := strings.Split(scanner.Text(), " ")
expect(t, arr[0], "CONTENTS")
scanner.Scan()
contents:=strings.Split(scanner.Text()," ")
val,_ := strconv.Atoi(contents[0])
time.Sleep(1 * time.Second) // sleep for 2 seconds
//now attempt write
content:= strconv.Itoa(val+(5*i))
fmt.Fprintf(conn, "write %v %v\r\n%v\r\n", name, len(content), content)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr = strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
_, err := strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
ch<-true
}
// Useful testing function
func expect(t *testing.T, a string, b string) {
if a != b {
t.Error(fmt.Sprintf("Expected %v, found %v", b, a)) // t.Error is visible when running `go test -verbose`
}
}
func expectOptions(t *testing.T, a string) {
check := false
for i := 101; i <= 110; i++ {
if strconv.Itoa(i) == a {
check = true
}
}
if check == false {
t.Error(fmt.Sprintf("Wrong Output, found %v", a))
}
}
func expectwr(t *testing.T, a string) {
check := false
for i := 10; i <= 20; i+=5 {
if strconv.Itoa(i) == a {
check = true
}
}
if check == false {
t.Error(fmt.Sprintf("Wrong Output, found %v", a))
}
}
// for cas
func expectcas(t *testing.T, a string) {
if a != "OK" && a != "ERR_VERSION" {
t.Error(fmt.Sprintf("Error in Cas"))
}
}
func expectConcCas(t *testing.T, a string) {
check := false
for i := 46; i <= 50; i++ {
if strconv.Itoa(i) == a {
check = true
}
}
if check == false {
t.Error(fmt.Sprintf("Wrong Output, found %v", a))
}
}
func write(t *testing.T, name string, ch chan bool) {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error())
}
contents := "2"
fmt.Fprintf(conn, "write %v %v\r\n%v\r\n", name, len(contents), contents)
scanner := bufio.NewScanner(conn)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
_, err = strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
ch <- true
}
func cas(t *testing.T, name string, ver string, ch chan bool) {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
t.Error(err.Error())
}
contents := "5"
fmt.Fprintf(conn, "cas %v %v %v\r\n%v\r\n", name, ver, len(contents), contents)
scanner := bufio.NewScanner(conn)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expectcas(t, arr[0])
_, err = strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
ch <- true
}
func casVal(t *testing.T, name string, ver string, ch chan bool, val int) {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
// t.Error(err.Error())
t.Error("Connection failure")
}
contents := strconv.Itoa(val)
fmt.Fprintf(conn, "cas %v %v %v\r\n%v\r\n", name, ver, len(contents), contents)
scanner := bufio.NewScanner(conn)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expectcas(t, arr[0])
_, err = strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
//fmt.Printf("casval%v",val)
ch <- true
}
func writeClient(conn net.Conn, scanner *bufio.Scanner, i int, t *testing.T, ch chan bool) {
name := "f1.txt"
for j := i; j <= i+100; j = j + 10 {
// Write a file
contents := strconv.Itoa(j)
fmt.Fprintf(conn, "write %v %v \r\n%v\r\n", name, len(contents), contents)
scanner.Scan() // read first line
resp := scanner.Text() // extract the text from the buffer
arr := strings.Split(resp, " ") // split into OK and <version>
expect(t, arr[0], "OK")
_, err := strconv.ParseInt(arr[1], 10, 64) // parse version as number
if err != nil {
t.Error("Non-numeric version found")
}
}
ch <- true
}