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

The file `main.py` would have:

```Python
{!../../../docs_src/async_tests/main.py!}
```

The file `test_main.py` would have the tests for `main.py`, it could look like this now:

```Python
{!../../../docs_src/async_tests/test_main.py!}
```

## Run it

You can run your tests as usual via:

```Python
{!../../../docs_src/app_testing/main.py!}
```

### Testdatei

Dann könnten Sie eine Datei `test_main.py` mit Ihren Tests haben. Sie könnte sich im selben Python-Package befinden (dasselbe Verzeichnis mit einer `__init__.py`-Datei):

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

{!../../../docs_src/app_testing/main.py!}
```

### 测试文件

然后你会有一个包含测试的文件 `test_main.py` 。app可以像Python包那样存在（一样是目录，但有个 `__init__.py` 文件）：

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

因为这文件在同一个包中，所以你可以通过相对导入从 `main` 模块（`main.py`）导入`app`对象：

```Python hl_lines="3"
{!../../../docs_src/app_testing/test_main.py!}
```

...然后测试代码和之前一样的。

## 测试：扩展示例

go test -v -x -gcflags=-m -ldflags=-v p
stderr 'compile( |\.exe"?)'
stderr 'p_test.go:.*can inline Test' # from compile of p_test
stderr 'testmain\.go:.*inlin' # from compile of testmain
stderr 'link(\.exe"?)? -'
stderr '\d+ symbols' # from linker
stderr 'p\.test( |\.exe"?)'
stdout 'TEST' # from test

import (
	"bytes"
	"cmd/cgo/internal/cgotest"
	"internal/testenv"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
)

func TestMain(m *testing.M) {
	log.SetFlags(log.Lshortfile)
	os.Exit(testMain(m))
}

func testMain(m *testing.M) int {
	GOPATH, err := os.MkdirTemp("", "cgostdio")
	if err != nil {
		log.Panic(err)
	}
	defer os.RemoveAll(GOPATH)
	os.Setenv("GOPATH", GOPATH)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build freebsd

package syscall_test

import (
	"os"
	"testing"
)

func TestMain(m *testing.M) {
	if os.Getenv("GO_DEATHSIG_PARENT") == "1" {
		deathSignalParent()
	} else if os.Getenv("GO_DEATHSIG_CHILD") == "1" {
		deathSignalChild()
	}

	os.Exit(m.Run())

func TestPass(t *testing.T) {}

-- exit0main/exit0main_test.go --
package exit0_test

import (
	"os"
	"testing"
)

func TestMain(m *testing.M) {
	os.Exit(0)
}

-- exit1main/exit1main_test.go --
package exit1_test

import (
	"os"
	"testing"
)

func TestMain(m *testing.M) {
	os.Exit(1)
}

-- panic/panic_test.go --
package panic_test

import "testing"

	"istio.io/istio/pkg/test/framework/components/istio"
	"istio.io/istio/pkg/test/framework/resource"
)

// TestMain defines the entrypoint for pilot tests using a standard Istio installation.
// If a test requires a custom install it should go into its own package, otherwise it should go
// here to reuse a single install across tests.
func TestMain(m *testing.M) {
	framework.
		NewSuite(m).

		switch {
		case name == "TestMain":
			if isTestFunc(n, "T") {
				t.Tests = append(t.Tests, testFunc{pkg, name, "", false})
				*doImport, *seen = true, true
				continue
			}
			err := checkTestFunc(n, "M")
			if err != nil {
				return err
			}
			if t.TestMain != nil {
				return errors.New("multiple definitions of TestMain")
			}
			t.TestMain = &testFunc{pkg, name, "", false}

                args '-cp', parameters.classpath.asPath, 'org.gradle.TestMain', parameters.projectDir, parameters.testFile
            }
        """
        fixture.withWorkActionClassInBuildScript()

        file('src/main/java/org/gradle/TestMain.java') << testMainSource

        buildFile << """
            apply plugin: "java"