这是我为从mongodb检索文档而编写的处理程序 如果找到文档,我们将相应地加载和呈现模板。 如果失败,它将重定向到404。
func EventNextHandler(w http.ResponseWriter, r *http.Request) {
search := bson.M{"data.start_time": bson.M{"$gte": time.Now()}}
sort := "data.start_time"
var result *Event
err := db.Find(&Event{}, search).Sort(sort).One(&result)
if err != nil && err != mgo.ErrNotFound {
panic(err)
}
if err == mgo.ErrNotFound {
fmt.Println("No such object in db. Redirect")
http.Redirect(w, r, "/404/", http.StatusFound)
return
}
// TODO:
// This is the absolute path parsing of template files so tests will pass
// Code can be better organized
var eventnext = template.Must(template.ParseFiles(
path.Join(conf.Config.ProjectRoot, "templates/_base.html"),
path.Join(conf.Config.ProjectRoot, "templates/event_next.html"),
))
type templateData struct {
Context *conf.Context
E *Event
}
data := templateData{conf.DefaultContext(conf.Config), result}
eventnext.Execute(w, data)
}
手动尝试,一切都很好。
然而,我似乎无法通过我的单元测试。在相应的测试文件中,这是我尝试加载EventNextHandler
的测试代码。
func TestEventNextHandler(t *testing.T) {
// integration test on http requests to EventNextHandler
request, _ := http.NewRequest("GET", "/events/next/", nil)
response := httptest.NewRecorder()
EventNextHandler(response, request)
if response.Code != http.StatusOK {
t.Fatalf("Non-expected status code%v:\n\tbody: %v", "200", response.Code)
}
}
测试在说明EventNextHandler(response, request)
的行中失败。
在我的错误消息中,它引用了我的处理程序代码中的行err := db.Find(&Event{}, search).Sort(sort).One(&result)
。
此处填写错误消息: -
=== RUN TestEventNextHandler
--- FAIL: TestEventNextHandler (0.00 seconds)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x8 pc=0x113eb8]
goroutine 4 [running]:
testing.func·004()
/usr/local/go/src/pkg/testing/testing.go:348 +0xcd
hp/db.Cursor(0xc2000c3cf0, 0xc2000fb1c0, 0x252d00)
/Users/calvin/gopath/src/hp/db/db.go:57 +0x98
hp/db.Find(0xc2000c3cf0, 0xc2000fb1c0, 0x252d00, 0xc2000e55c0, 0x252d00, ...)
/Users/calvin/gopath/src/hp/db/db.go:61 +0x2f
hp/event.EventNextHandler(0xc2000e5580, 0xc2000a16a0, 0xc2000c5680)
/Users/calvin/gopath/src/hp/event/controllers.go:106 +0x1da
hp/event.TestEventNextHandler(0xc2000d5240)
/Users/calvin/gopath/src/hp/event/controllers_test.go:16 +0x107
testing.tRunner(0xc2000d5240, 0x526fe0)
/usr/local/go/src/pkg/testing/testing.go:353 +0x8a
created by testing.RunTests
/usr/local/go/src/pkg/testing/testing.go:433 +0x86b
goroutine 1 [chan receive]:
testing.RunTests(0x3bdff0, 0x526fe0, 0x1, 0x1, 0x1, ...)
/usr/local/go/src/pkg/testing/testing.go:434 +0x88e
testing.Main(0x3bdff0, 0x526fe0, 0x1, 0x1, 0x532580, ...)
/usr/local/go/src/pkg/testing/testing.go:365 +0x8a
main.main()
hp/event/_test/_testmain.go:43 +0x9a
编写测试的正确方法是什么?要考虑从mongodb中检索不到任何内容的情况并应用断言来验证,从而编写经过验证的测试。
答案 0 :(得分:6)
我的测试似乎没有初始化db
。就像一个类似于所有其他语言的单元测试框架的“设置”步骤。
我必须确保导入我的db
包,然后实现两行连接到数据库并注册索引。
func TestEventNextHandler(t *testing.T) {
// set up test database
db.Connect("127.0.0.1", "test_db")
db.RegisterAllIndexes()
// integration test on http requests to EventNextHandler
request, _ := http.NewRequest("GET", "/events/next/", nil)
response := httptest.NewRecorder()
EventNextHandler(response, request)
if response.Code != 302 {
t.Fatalf("Non-expected status code %v:\n\tbody: %v", "200", response.Code)
}
}