feat: Ajouter le module de capture réseau avec filtres BPF et tests associés

Co-authored-by: aider (openrouter/qwen/qwen3-coder-plus) <aider@aider.chat>

internal/capture/capture_test.go

@@ -0,0 +1,84 @@
+package capture
+
+import (
+	"testing"
+	"time"
+
+	"ja4sentinel/internal/api"
+)
+
+func TestBuildBPFForPorts(t *testing.T) {
+	tests := []struct {
+		name  string
+		ports []uint16
+		want  string
+	}{
+		{
+			name:  "single port",
+			ports: []uint16{443},
+			want:  "(tcp port 443)",
+		},
+		{
+			name:  "multiple ports",
+			ports: []uint16{443, 8443},
+			want:  "(tcp port 443) or (tcp port 8443)",
+		},
+		{
+			name:  "no ports",
+			ports: []uint16{},
+			want:  "tcp",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := buildBPFForPorts(tt.ports)
+			if got != tt.want {
+				t.Errorf("buildBPFForPorts() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestJoinString(t *testing.T) {
+	tests := []struct {
+		name  string
+		parts []string
+		sep   string
+		want  string
+	}{
+		{
+			name:  "empty slices",
+			parts: []string{},
+			sep:   ", ",
+			want:  "",
+		},
+		{
+			name:  "single element",
+			parts: []string{"hello"},
+			sep:   ", ",
+			want:  "hello",
+		},
+		{
+			name:  "multiple elements",
+			parts: []string{"hello", "world", "test"},
+			sep:   ", ",
+			want:  "hello, world, test",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := joinString(tt.parts, tt.sep)
+			if got != tt.want {
+				t.Errorf("joinString() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+// Tests d'intégration nécessitant une interface valide seront à faire dans des environnements de test appropriés
+// car la capture réseau nécessite des permissions élevées
+func TestCaptureIntegration(t *testing.T) {
+	t.Skip("Skipping integration test requiring network access and elevated privileges")
+}