[backend] [actions] Add testing workflow for the backend

.github/workflows/build-backend.yaml

@@ -6,6 +6,9 @@ on:
       SECRET:
         required: true
   workflow_dispatch:
+  pull_request:
+    paths:
+      - backend/**
 
 env:
   SECRET: ${{ secrets.SECRET }}
@@ -26,7 +29,9 @@ jobs:
     - name: "Install packages"
       run: apk update && apk add --no-cache libpcap-dev musl-dev gcc go
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+      with:
+        sparse-checkout: backend
 
     - name: "Create output path"
       working-directory: "${{env.BACKEND_DIR}}"
@@ -47,10 +52,12 @@ jobs:
         go build -ldflags '-linkmode external -extldflags "-static"' -o ../output/backend-linux-64
 
     - name: "Upload build"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: backend-linux
         path: "${{env.BACKEND_DIR}}/output/*"
+        retention-days: 3
+        compression-level: 9
 
   build-backend-windows:
     name: "Build backend for windows"
@@ -90,10 +97,12 @@ jobs:
         go build -o ..\output\backend-windows-64.exe
 
     - name: "Upload build"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: backend-windows
         path: "${{env.BACKEND_DIR}}\\output\\*"
+        retention-days: 3
+        compression-level: 9
 
   build-backend-mac:
     name: "Build backend for macOS"
@@ -142,7 +151,9 @@ jobs:
         go build -o ../output/backend-macos-m1-64
 
     - name: "Upload build"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: backend-macos
         path: "${{env.BACKEND_DIR}}/output/*"
+        retention-days: 3
+        compression-level: 9

.github/workflows/build-ethernet-view.yaml

@@ -3,6 +3,10 @@ name: Build ethernet view
 on:
   workflow_call:
   workflow_dispatch:
+  pull_request:
+    paths:
+      - ethernet-view/**
+      - common-front/**
 
 jobs:
   build-ethernet-view:
@@ -14,7 +18,11 @@ jobs:
       COMMON_DIR: ./common-front
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+      with:
+        sparse-checkout: |
+          ethernet-view
+          common-front
 
     - name: "Install common front dependencies"
       working-directory: "${{env.COMMON_DIR}}"
@@ -36,7 +44,9 @@ jobs:
 
 
     - name: "Upload build"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ethernet-view
         path: "${{env.FRONTEND_DIR}}/static/*"
+        retention-days: 3
+        compression-level: 9

.github/workflows/test-backend.yaml

@@ -0,0 +1,45 @@
+name: Test backend
+
+on:
+    push:
+      paths:
+        - backend/**
+    pull_request:
+      paths:
+        - backend/**
+    workflow_dispatch:
+
+env:
+  SECRET: ${{ secrets.SECRET }}
+
+jobs:
+  test-backend:
+    name: "Test backend"
+    runs-on: ubuntu-latest
+
+    env:
+      BACKEND_DIR: ./backend
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.21
+          cache: false
+
+
+      - name: Install Dependencies
+        run: |
+          sudo apt-get update && sudo apt-get install -y libpcap-dev
+
+      - name: "Load secret"
+        working-directory: "${{env.BACKEND_DIR}}"
+        run: |
+          ./load-secret.sh "$SECRET"
+
+      - name: Test with Go
+        working-directory: "${{env.BACKEND_DIR}}"
+        run: go test -v -timeout 30s ./...

backend/pkg/transport/session/buffer.go

@@ -1,31 +1,46 @@
 package session
 
+import "io"
+
 type Buffer struct {
-	data chan byte
+	data   chan byte
+	closed chan struct{}
 }
 
 func NewBuffer(size int) *Buffer {
 	return &Buffer{
-		data: make(chan byte, size),
+		data:   make(chan byte, size),
+		closed: make(chan struct{}),
 	}
 }
 
 func (buffer *Buffer) Read(b []byte) (n int, err error) {
 	n = 0
 	ok := true
-loop:
 	for i := range b {
-		b[i], ok = <-buffer.data
-		n++
-		if !ok {
-			break loop
+		select {
+		case b[i], ok = <-buffer.data:
+			if !ok {
+				err = io.EOF
+				return
+			}
+			n++
+		default:
+			return
 		}
 	}
-
-	return n, nil
+	return
 }
 
 func (buffer *Buffer) Write(b []byte) (n int, err error) {
+	select {
+	case _, ok := <-buffer.closed:
+		if !ok {
+			return 0, io.ErrClosedPipe
+		}
+	default:
+	}
+
 	n = 0
 	for i := range b {
 		buffer.data <- b[i]
@@ -34,3 +49,9 @@ func (buffer *Buffer) Write(b []byte) (n int, err error) {
 
 	return n, nil
 }
+
+func (buffer *Buffer) Close() error {
+	close(buffer.data)
+	close(buffer.closed)
+	return nil
+}

backend/pkg/transport/session/sniffer_test.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"sync"
 	"testing"
+	"time"
 
 	"github.com/HyperloopUPV-H8/h9-backend/pkg/transport/network"
 	"github.com/HyperloopUPV-H8/h9-backend/pkg/transport/session"
@@ -216,19 +217,40 @@ func TestSnifferDemux(t *testing.T) {
 				go func(socket network.Socket, reader io.Reader) {
 					defer wg.Done()
 					buf := make([]byte, 65536)
+					timeout := time.After(time.Millisecond)
+					readChan := make(chan []byte)
 					for {
-						n, err := reader.Read(buf)
-						if err != nil {
+						go func() {
+							for {
+								n, err := reader.Read(buf)
+								if err != nil {
+									close(readChan)
+									return
+								}
+								if n > 0 {
+									readChan <- buf[:n]
+									return
+								}
+							}
+						}()
+
+						select {
+						case <-timeout:
 							return
+						case buf, ok := <-readChan:
+							if !ok {
+								return
+							}
+							mapMx.Lock()
+							data := string(buf)
+							prev, ok := outputMap[socket]
+							if ok {
+								data = prev + data
+							}
+							outputMap[socket] = data
+							mapMx.Unlock()
 						}
-						mapMx.Lock()
-						data := string(buf[:n])
-						prev, ok := outputMap[socket]
-						if ok {
-							data = prev + data
-						}
-						outputMap[socket] = data
-						mapMx.Unlock()
+
 					}
 				}(socket, reader)
 			}