import (
	"bytes"
	"context"
	"encoding/json"
	"encoding/xml"
	"fmt"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/minio/minio-go/v7/pkg/tags"
	"github.com/minio/minio/internal/crypto"
	xhttp "github.com/minio/minio/internal/http"
	xxml "github.com/minio/xxml"
)

// Returns a hexadecimal representation of time at the
// time response is sent to the client.
func mustGetRequestID(t time.Time) string {

/// tip | "提示"

除了发送请求之外，如果你还想测试时在FastAPI应用中调用 `async` 函数（例如异步数据库函数）， 可以在高级教程中看下 [Async Tests](../advanced/async-tests.md){.internal-link target=_blank} 。

///

## 分离测试

在实际应用中，你可能会把你的测试放在另一个文件里。

您的**FastAPI**应用程序也可能由一些文件/模块组成等等。

### **FastAPI** app 文件

假设你有一个像 [更大的应用](bigger-applications.md){.internal-link target=_blank} 中所描述的文件结构:

```
.
├── app
│   ├── __init__.py
│   └── main.py
```

package cmd

import (
	"bytes"
	"encoding/hex"
	"errors"
	"fmt"
	"hash"
	"io"

	"github.com/minio/highwayhash"
	"github.com/minio/minio/internal/hash/sha256"
	"golang.org/x/crypto/blake2b"

	xioutil "github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/logger"
)

// magic HH-256 key as HH-256 hash of the first 100 decimals of π as utf-8 string with a zero key.

	jsoniter "github.com/json-iterator/go"
	miniogopolicy "github.com/minio/minio-go/v7/pkg/policy"
	"github.com/minio/minio-go/v7/pkg/tags"
	"github.com/minio/minio/internal/auth"
	"github.com/minio/minio/internal/handlers"
	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/pkg/v3/policy"
)

// PolicySys - policy subsystem.
type PolicySys struct{}

// Get returns stored bucket policy

import jcifs.dcerpc.DcerpcHandle;
import jcifs.dcerpc.msrpc.MsrpcDfsRootEnum;
import jcifs.dcerpc.msrpc.MsrpcShareEnum;
import jcifs.internal.smb1.net.NetShareEnum;
import jcifs.internal.smb1.net.NetShareEnumResponse;
import jcifs.internal.smb1.trans.SmbComTransaction;
import jcifs.internal.smb1.trans.SmbComTransactionResponse;


/**
 * @author mbechler
 *
 */
final class SmbEnumerationUtil {

// This file encapsulates some of the odd characteristics of the
// MIPS (MIPS64) instruction set, to minimize its interaction
// with the core of the assembler.

package arch

import (
	"cmd/internal/obj"
	"cmd/internal/obj/mips"
)

func jumpMIPS(word string) bool {
	switch word {
	case "BEQ", "BFPF", "BFPT", "BGEZ", "BGEZAL", "BGTZ", "BLEZ", "BLTZ", "BLTZAL", "BNE", "JMP", "JAL", "CALL":
		return true
	}

Por padrão, o **FastAPI** irá converter automaticamente o valor do retorno para JSON utilizando o `jsonable_encoder` explicado em [JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.

Então, por baixo dos panos, ele incluiria esses dados compatíveis com JSON (e.g. um `dict`) dentro de uma `JSONResponse` que é utilizada para enviar uma resposta para o cliente.

#### Pour davantage de détails

Imaginons que votre fichier s'appelle `myapp.py`.

Si vous l'exécutez avec :

<div class="termy">

```console
$ python myapp.py
```

</div>

alors la variable interne `__name__` de votre fichier, créée automatiquement par Python, aura pour valeur la chaîne de caractères `"__main__"`.

Ainsi, la section :

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

There are some data structures that can contain other values, like `dict`, `list`, `set` and `tuple`. And the internal values can have their own type too.

These types that have internal types are called "**generic**" types. And it's possible to declare them, even with their internal types.

To declare those types and the internal types, you can use the standard Python module `typing`. It exists specifically to support these type hints.

    If you need a refresher about when to use which, check out the section _"In a hurry?"_ in the docs about [`async` and `await`](../async.md#in-a-hurry){.internal-link target=_blank}.

9. This *path operation function* is not returning dataclasses (although it could), but a list of dictionaries with internal data.

    FastAPI will use the `response_model` parameter (that includes dataclasses) to convert the response.