feat(engine): orchestrate the sing-box service

internal/engine/engine_test.go

@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: MIT
+
+package engine
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"prx/internal/config"
+	"prx/internal/execx"
+)
+
+func TestIsActive(t *testing.T) {
+	active := &execx.Fake{Handler: func(_ string, _ []string, _ []byte) (execx.Result, error) {
+		return execx.Result{Stdout: []byte("active\n")}, nil
+	}}
+	got, err := IsActive(context.Background(), active, "sing-box")
+	if err != nil || !got {
+		t.Fatalf("IsActive = %v, %v", got, err)
+	}
+
+	inactive := &execx.Fake{Handler: func(_ string, _ []string, _ []byte) (execx.Result, error) {
+		return execx.Result{Stdout: []byte("inactive\n"), Code: 3}, &execx.ExitError{Name: "systemctl", Code: 3, Stderr: []byte("inactive")}
+	}}
+	got, err = IsActive(context.Background(), inactive, "sing-box")
+	if err != nil || got {
+		t.Fatalf("IsActive(inactive) = %v, %v", got, err)
+	}
+}
+
+func TestValidateConfig(t *testing.T) {
+	dir := t.TempDir()
+	withTun := filepath.Join(dir, "with-tun.json")
+	if err := os.WriteFile(withTun, []byte(`{"inbounds":[{"type":"tun"}]}`), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	warnings, err := ValidateConfig(withTun)
+	if err != nil {
+		t.Fatalf("ValidateConfig: %v", err)
+	}
+	if len(warnings) != 0 {
+		t.Fatalf("unexpected warnings: %v", warnings)
+	}
+
+	noTun := filepath.Join(dir, "no-tun.json")
+	if err := os.WriteFile(noTun, []byte(`{"inbounds":[{"type":"mixed"}]}`), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	warnings, err = ValidateConfig(noTun)
+	if err != nil {
+		t.Fatalf("ValidateConfig: %v", err)
+	}
+	if len(warnings) == 0 {
+		t.Fatal("expected a warning for missing tun inbound")
+	}
+}
+
+func TestValidateConfigWarnsOnAutoRouteDisabled(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "auto-route-off.json")
+	body := `{"inbounds":[{"type":"tun"}],"route":{"auto_route":false}}`
+	if err := os.WriteFile(path, []byte(body), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	warnings, err := ValidateConfig(path)
+	if err != nil {
+		t.Fatalf("ValidateConfig: %v", err)
+	}
+	found := false
+	for _, w := range warnings {
+		if strings.Contains(w, "auto_route") {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("expected an auto_route warning, got %v", warnings)
+	}
+}
+
+func TestTemplateContainsTunAndBypass(t *testing.T) {
+	cfg := config.Default()
+	body, err := Template(cfg)
+	if err != nil {
+		t.Fatalf("Template: %v", err)
+	}
+	s := string(body)
+	for _, needle := range []string{`"type": "tun"`, `"auto_route": true`, "10.0.0.0/8", "192.168.0.0/16"} {
+		if !strings.Contains(s, needle) {
+			t.Errorf("template missing %q", needle)
+		}
+	}
+}