feat: build vehicle data platform and production pipeline

vehicle-data-platform/apps/api/cmd/alert-stream-evaluator/main_test.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"testing"
+	"time"
+
+	"github.com/segmentio/kafka-go"
+
+	"lingniu/vehicle-data-platform/apps/api/internal/config"
+	"lingniu/vehicle-data-platform/apps/api/internal/platform"
+)
+
+func validAlertStreamConfig() config.Config {
+	return config.Config{
+		MySQLDSN:                "user:pass@tcp(localhost:3306)/db?parseTime=true",
+		AlertStreamMode:         "shadow",
+		AlertStreamKafkaBrokers: []string{"kafka-a:9092"},
+		AlertStreamKafkaTopics:  []string{"vehicle.fields.go.jt808.v1"},
+		AlertStreamKafkaGroup:   "vehicle-alert-stream-v1",
+		AlertStreamBatchSize:    200,
+		AlertStreamBatchWait:    100 * time.Millisecond,
+		AlertStreamLateness:     2 * time.Minute,
+	}
+}
+
+func TestAlertStreamConfigAcceptsReleasedModesAndRefusesUnknownTopics(t *testing.T) {
+	cfg := validAlertStreamConfig()
+	if err := validateAlertStreamConfig(cfg); err != nil {
+		t.Fatalf("valid shadow config rejected: %v", err)
+	}
+	cfg.AlertStreamMode = "active"
+	if err := validateAlertStreamConfig(cfg); err != nil {
+		t.Fatalf("released active mode rejected: %v", err)
+	}
+	cfg.AlertStreamMode = "unsafe"
+	if err := validateAlertStreamConfig(cfg); err == nil {
+		t.Fatal("unknown mode must fail closed")
+	}
+	cfg = validAlertStreamConfig()
+	cfg.AlertStreamKafkaTopics = []string{"vehicle.raw.go.jt808.v1"}
+	if err := validateAlertStreamConfig(cfg); err == nil {
+		t.Fatal("raw topic must not be accepted as a fields alert stream")
+	}
+}
+
+func TestNewAlertStreamGroupStartsAtLatestAndThenUsesCommittedOffsets(t *testing.T) {
+	cfg := validAlertStreamConfig()
+	reader := alertStreamReaderConfig(cfg)
+	if reader.StartOffset != kafka.LastOffset {
+		t.Fatalf("new production group would replay the full retained topic: start=%d", reader.StartOffset)
+	}
+	if reader.GroupID != cfg.AlertStreamKafkaGroup || len(reader.GroupTopics) != 1 || reader.GroupTopics[0] != cfg.AlertStreamKafkaTopics[0] {
+		t.Fatalf("reader group contract drifted: %+v", reader)
+	}
+}
+
+func TestAlertStreamInvalidCodesAreAggregatedWithoutPayloads(t *testing.T) {
+	records := []platform.AlertStreamRecord{{ErrorCode: "missing_vin_jt808"}, {Valid: true}, {ErrorCode: "invalid_field_name"}, {ErrorCode: "missing_vin_jt808"}}
+	if got := alertStreamInvalidCodes(records); got != "invalid_field_name:1,missing_vin_jt808:2" {
+		t.Fatalf("invalid code summary=%q", got)
+	}
+}