feat(stats): add vehicle data source metadata

go/vehicle-gateway/internal/stats/source_test.go

@@ -0,0 +1,79 @@
+package stats
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/envelope"
+)
+
+func TestNormalizeSourceIPDropsPort(t *testing.T) {
+	tests := map[string]string{
+		"115.231.168.135:20215":  "115.231.168.135",
+		"115.231.168.135":        "115.231.168.135",
+		" 115.159.85.149:28316 ": "115.159.85.149",
+		"":                       "",
+	}
+	for input, want := range tests {
+		if got := NormalizeSourceIP(input); got != want {
+			t.Fatalf("NormalizeSourceIP(%q) = %q, want %q", input, got, want)
+		}
+	}
+}
+
+func TestNewSourceIdentityRequiresSourceIP(t *testing.T) {
+	identity, ok := NewSourceIdentity(envelope.ProtocolJT808, "115.231.168.135:20215")
+	if !ok {
+		t.Fatal("NewSourceIdentity() ok = false")
+	}
+	if identity.Protocol != envelope.ProtocolJT808 {
+		t.Fatalf("protocol = %q", identity.Protocol)
+	}
+	if identity.SourceIP != "115.231.168.135" {
+		t.Fatalf("source ip = %q", identity.SourceIP)
+	}
+	if identity.SourceEndpoint != "115.231.168.135:20215" {
+		t.Fatalf("endpoint = %q", identity.SourceEndpoint)
+	}
+
+	if _, ok := NewSourceIdentity(envelope.ProtocolJT808, ""); ok {
+		t.Fatal("empty endpoint should not produce identity")
+	}
+}
+
+func TestUpsertDataSourcePreservesManualFields(t *testing.T) {
+	exec := &recordingExec{}
+	identity := SourceIdentity{
+		Protocol:       envelope.ProtocolJT808,
+		SourceIP:       "115.231.168.135",
+		SourceEndpoint: "115.231.168.135:20215",
+	}
+	if err := UpsertDataSource(context.Background(), exec, identity, time.Date(2026, 7, 8, 13, 0, 0, 0, time.UTC)); err != nil {
+		t.Fatalf("UpsertDataSource() error = %v", err)
+	}
+	if len(exec.calls) != 1 {
+		t.Fatalf("exec calls = %d", len(exec.calls))
+	}
+	sql := exec.calls[0].query
+	for _, want := range []string{
+		"INSERT INTO vehicle_data_source",
+		"latest_source_endpoint = VALUES(latest_source_endpoint)",
+		"latest_seen_at = VALUES(latest_seen_at)",
+	} {
+		if !strings.Contains(sql, want) {
+			t.Fatalf("source upsert missing %q: %s", want, sql)
+		}
+	}
+	for _, forbidden := range []string{
+		"platform_name = VALUES(platform_name)",
+		"trust_priority = VALUES(trust_priority)",
+		"enabled = VALUES(enabled)",
+		"remark = VALUES(remark)",
+	} {
+		if strings.Contains(sql, forbidden) {
+			t.Fatalf("source upsert should preserve manual field %q: %s", forbidden, sql)
+		}
+	}
+}