测试涉及 sqlboiler 错误的 Gin 路由处理程序 - 接口转换：接口为零，而不是 bool.ContextExecutor

如何解决测试涉及 sqlboiler 错误的 Gin 路由处理程序 - 接口转换：接口为零，而不是 bool.ContextExecutor

我有一个项目，其中使用了 gin framework 和 sqlboiler 作为 ORM。
我想测试一个处理程序，但我有一个错误，我不知道如何解决它，但我知道这与未将 c context 绑定到测试 API 调用有关。

//book.go

import (
    "github.com/volatiletech/sqlboiler/v4/queries"
)

func (ctrl BookController) Item(c *gin.Context) {
    var rs BookItem
    where,err := ctrl.getWhereQuery(c)
    if err != nil {
        c.AbortWithStatusJSON(http.StatusUnprocessableEntity,gin.H{"msg": err.Error()})
        return
    }

    rql := fmt.Sprintf("%s %s %s",ctrl.getSelectQuery(),ctrl.getFromQuery(),where,)
    err = queries.RawG(rql).BindG(context.Background(),&rs)  // THIS LINE IS CAUSING ERROR I THINK.

    if err != nil {
        _ = c.AbortWithError(http.StatusInternalServerError,err)
        return
    }

    rs.Link = viper.GetString("HOST.URI") + "book/" + strconv.Itoa(cast.ToInt(c.Param("id")))

    c.JSON(http.StatusOK,rs)
}

当我在邮递员上运行上述代码时，一切正常，我获得了 200 状态。所以这个处理程序没有错。问题是当我想在这样的测试场景中调用这个处理程序时：

// book_test.go
func TestBookController_Item(t *testing.T) {
    r := gin.Default()
    var ctrl BookController
    r.Use(middlewares.Cors())
    r.Use(middlewares.Authenticate())
    r.Use(middlewares.ActivityLog(true))
    r.Use(middlewares.SentryErrorReporter())
    r.GET(BookShowEndpoint,ctrl.Item)
    ts := httptest.NewServer(r)
    defer ts.Close()

    client := &http.Client{}
    req,err := http.NewRequest("GET",fmt.Sprintf("%s%s",ts.URL,BookShowEndpoint),nil)
    if err != nil {
        t.Fatalf("Error: %v",err)
    }

    req.Header.Set("Authorization",utils.Authorization)

    resp,err := client.Do(req)

    if err != nil {
        t.Fatalf("Error: %v",err)
    }

    if resp.StatusCode != http.StatusOK {
        t.Fatalf("Expected status code 200,got %v",resp.StatusCode)
    }
}

当我运行此命令 go test -v -run TestBookController_Item --count=1 来测试该路由时，出现此错误：

[GIN-debug] GET    /api-publisher/v1/books/book/5008 --> some.route.com/backend/publisher/api/publisher/controllers.BookController.Item-fm (7 handlers)
unexpected end of JSON input


2021/06/07 12:09:09 [Recovery] 2021/06/07 - 12:09:09 panic recovered:
GET /api-publisher/v1/books/book/5008 HTTP/1.1
Host: 127.0.0.1:33603
Accept-Encoding: gzip
Authorization: *
User-Agent: Go-http-client/1.1


interface conversion: interface is nil,not boil.ContextExecutor
/usr/local/go/src/runtime/iface.go:454 (0x40d7fb)
        assertI2I: panic(&TypeAssertionError{nil,nil,&inter.typ,""})
/var/www/galaxy_separated/publisher/vendor/github.com/volatiletech/sqlboiler/v4/queries/reflect.go:133 (0xa3b035)
        (*Query).Bind: rows,err = q.QueryContext(ctx,exec.(boil.ContextExecutor))
/var/www/galaxy_separated/publisher/vendor/github.com/volatiletech/sqlboiler/v4/queries/reflect.go:52 (0xbbc49e)
        (*Query).BindG: return q.Bind(ctx,boil.GetDB(),obj)
/var/www/galaxy_separated/publisher/api/publisher/controllers/book.go:150 (0xbbc443)
        BookController.Item: err = queries.RawG(rql).BindG(context.Background(),&rs)
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0xb335f9)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/api/publisher/middlewares/sentry_error_reporter.go:21 (0xb335d8)
        sentryErrorReporter.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0xb32a01)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/api/publisher/middlewares/activity_log.go:20 (0xb329ca)
        ActivityLog.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0xb32f46)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/api/publisher/middlewares/authentication.go:26 (0xb32f29)
        Authenticate.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0xb334d1)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/api/publisher/middlewares/cors.go:18 (0xb334b8)
        Cors.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0x9d1679)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/recovery.go:99 (0x9d1660)
        CustomRecoveryWithWriter.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0x9d0753)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/logger.go:241 (0x9d0712)
        LoggerWithConfig.func1: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/context.go:165 (0x9c6c09)
        (*Context).Next: c.handlers[c.index](c)
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/gin.go:489 (0x9c6bef)
        (*Engine).handleHTTPRequest: c.Next()
/var/www/galaxy_separated/publisher/vendor/github.com/gin-gonic/gin/gin.go:445 (0x9c66db)
        (*Engine).ServeHTTP: engine.handleHTTPRequest(c)
/usr/local/go/src/net/http/server.go:2887 (0x72b542)
        serverHandler.ServeHTTP: handler.ServeHTTP(rw,req)
/usr/local/go/src/net/http/server.go:1952 (0x72696c)
        (*conn).serve: serverHandler{c.server}.ServeHTTP(w,w.req)
/usr/local/go/src/runtime/asm_amd64.s:1371 (0x473b00)
        goexit: BYTE    $0x90   // NOP

[GIN] 2021/06/07 - 12:09:09 | 500 |    1.353304ms |       127.0.0.1 | GET      "/api-publisher/v1/books/book/5008"
    book_test.go:53: Expected status code 200,got 500
--- FAIL: TestBookController_Item (0.00s)

问题似乎与我在上面评论的 book.go 文件上的行有关，因为当我评论该行时，测试通过，但关键是我不应该修改 {{1} } 文件（这是显而易见的）。 其实我觉得问题是这样的：
如何在测试中绑定 context.Background()？