基本过程
- coding in local IDE,write unit test,
- add & run integrate test(tradeoff between自动化与手动,如果自动化写的少,多动手)
- deploy to dev environment
- deploy to qa or production environment. not be discussed on this page
Requirement
Environment in logic
- IDE environment for develop effectively. Should support debug interactively with ide breakpoint.
- Integrate Test environment. For run integrate by hand or automatically.
- Local Environment.
- Dev environment.
And QA environment、Prod environment not maintained by dev
Environment in implement
Realness
Unit Test -> Integrate Test -> Dev, from fake to real
Implement
Run unit test by hand or script with go test.
Unit Test
Write Unit Test With fx support to inject some mock component, example:
func TestFxPopluate(t *testing.T) {
// Some external module that provides a user name.
type Username string
UserModule := fx.Provide(func() Username { return "john" })
var user Username
app := fxtest.New(
t,
UserModule,
fx.Populate(&user),
)
app.RequireStart().RequireStop()
t.Log(user)
}
Integrate Test
use httptest library, example
func TestHttpTestApi(t *testing.T) {
InitTest()
var r *gin.Engine
app := fxtest.New(t, logger.Module, database.Module, cache.Module, config.Module,
dao.Module, handler.ModuleWithDep, router.Module, fx.Populate(&r))
app.RequireStart().RequireStop()
// create request
req, err := http.NewRequest("GET", "/api/v3/test/ping", nil)
if err != nil {
t.Fatal(err)
}
// response checker
rr := httptest.NewRecorder()
r.ServeHTTP(rr, req)
if status := rr.Code; status != http.StatusForbidden {
t.Errorf("handler returned wrong status code: got %v want %v",
status, http.StatusOK)
}
return
/*
expected := `{"message": "pong"}`
if rr.Body.String() != expected {
t.Errorf("handler returned unexpected body: got %v want %v",
rr.Body.String(), expected)
}
*/
}
Distinguish env by shell env value or cmd flag or both, supported by config library
IDE env、Integrate Test env、Local env can use same config、same environment, but with some difference, so use different flag. Different Requirement
- IDE env require run in IDE, so more mock component. Actually one of server、fe run separately in IDE,other run in docker
- Integrate Test should clean db and other state before every run. Integrate can be run in any one of IDE、local、dev、QA env with clean db、state
- Local env require keep state.
Use docker to implement this.
Env define: ["ide", "local", "dev"], and ["qa", "prod"]
Use shell env、cmd flags to determine which env to run, as to load different config and component.
monkey patch
https://github.com/bouk/monkey
可以极大地简化使用依赖注入时的mock替换,避免在更深的层次进行替换时的繁琐操作。
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