feat: 完善后端脚手架基础能力

config/config_test.go

@@ -0,0 +1,53 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadFromEnvironmentOverridesYAML(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "app.yaml")
+	if err := os.WriteFile(path, []byte("database:\n  driver: postgres\nredis:\n  enabled: false\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("DATABASE_DRIVER", "mysql")
+	t.Setenv("DATABASE_PORT", "3307")
+	t.Setenv("REDIS_ENABLED", "true")
+	t.Setenv("JWT_ACCESS_EXPIRE_MINUTES", "30")
+
+	cfg, err := LoadFrom(path)
+	if err != nil {
+		t.Fatalf("LoadFrom() error = %v", err)
+	}
+	if cfg.Database.Driver != "mysql" || cfg.Database.Port != 3307 {
+		t.Fatalf("database override failed: %+v", cfg.Database)
+	}
+	if !cfg.Redis.Enabled || cfg.JWT.AccessExpireMinutes != 30 {
+		t.Fatalf("environment override failed: redis=%v jwt=%+v", cfg.Redis.Enabled, cfg.JWT)
+	}
+}
+
+func TestSQLiteDefaults(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "app.yaml")
+	if err := os.WriteFile(path, []byte("database:\n  driver: sqlite\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	cfg, err := LoadFrom(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Database.SQLitePath == "" || cfg.Database.MaxOpenConns != 1 {
+		t.Fatalf("unexpected SQLite defaults: %+v", cfg.Database)
+	}
+}
+
+func TestProductionRejectsDefaultJWTSecret(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "app.yaml")
+	if err := os.WriteFile(path, []byte("app:\n  environment: production\ndatabase:\n  driver: sqlite\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := LoadFrom(path); err == nil {
+		t.Fatal("production config accepted the default JWT secret")
+	}
+}