仓库自包含化：Docker/CI/文档/规范入库，路由分组拆分

internal/config/config_test.go

@@ -0,0 +1,41 @@
+package config
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestDBFromEnv(t *testing.T) {
+	tests := []struct {
+		name       string
+		driver     string
+		dsn        string
+		wantDriver string
+		wantErr    string
+	}{
+		{name: "缺省走 sqlite", wantDriver: "sqlite"},
+		{name: "postgres 带 DSN", driver: "postgres", dsn: "host=x", wantDriver: "postgres"},
+		{name: "mysql 缺 DSN 报错", driver: "mysql", wantErr: "DB_DSN is required"},
+		{name: "postgres 缺 DSN 报错", driver: "postgres", wantErr: "DB_DSN is required"},
+		{name: "非法驱动报错", driver: "oracle", wantErr: "unsupported DB_DRIVER"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Setenv("DB_DRIVER", tt.driver)
+			t.Setenv("DB_DSN", tt.dsn)
+			driver, dsn, err := dbFromEnv()
+			if tt.wantErr != "" {
+				if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
+					t.Fatalf("err = %v, want contains %q", err, tt.wantErr)
+				}
+				return
+			}
+			if err != nil {
+				t.Fatalf("dbFromEnv: %v", err)
+			}
+			if driver != tt.wantDriver || dsn != tt.dsn {
+				t.Fatalf("got (%q,%q), want (%q,%q)", driver, dsn, tt.wantDriver, tt.dsn)
+			}
+		})
+	}
+}