*
 * <p>The tested methods and constructors are invoked -- each time with one parameter being null and
 * the rest not null -- and the test fails if no expected exception is thrown. {@code
 * NullPointerTester} uses best effort to pick non-null default values for many common JDK and Guava
 * types, and also for interfaces and public classes that have public parameter-less constructors.

```Python hl_lines="1  4"
{!> ../../docs_src/python_types/tutorial008.py!}
```

////

Isso significa que:

* A variável `prices` é um dict`:
    * As chaves deste `dict` são do tipo `str` (digamos, o nome de cada item).
    * Os valores deste `dict` são do tipo `float` (digamos, o preço de cada item).

#### Union

</p>
<p align="center">
<a href="https://github.com/fastapi/fastapi/actions?query=workflow%3ATest+event%3Apush+branch%3Amaster" target="_blank">
    <img src="https://github.com/fastapi/fastapi/actions/workflows/test.yml/badge.svg?event=push&branch=master" alt="Test">
</a>
<a href="https://coverage-badge.samuelcolvin.workers.dev/redirect/fastapi/fastapi" target="_blank">
    <img src="https://coverage-badge.samuelcolvin.workers.dev/fastapi/fastapi.svg" alt="Coverage">

		}
	}

	if DB.Dialector.Name() == "sqlserver" {
		// sqlserver doesn't support order by in subquery
		return
	}
	results, err = db.Preload("Pets", func(db gorm.PreloadBuilder) error {
		db.Order("name desc").LimitPerRecord(5)
		return nil
	}).Where("name in ?", names).Find(ctx)

	for _, result := range results {
		if result.Name == u.Name {
			if len(result.Pets) != len(u.Pets) {

Voor nu hoef je alleen te weten dat `Annotated` bestaat en dat het standaard Python is. 😎

Later zul je zien hoe **krachtig** het kan zijn.

/// tip

 * the updated response if it has changed, or a short 'not modified' response if the client's copy
 * is still valid. Such responses increment both the network count and hit count.
 *
 * The best way to improve the cache hit rate is by configuring the web server to return cacheable
 * responses. Although this client honors all [HTTP/1.1 (RFC 7234)][rfc_7234] cache headers, it
 * doesn't cache partial responses.
 *

By considering these concepts, you will be able to **evaluate and design** the best way to deploy **your own APIs**.

In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

 *   <li>Convert between specific preset values using {@link
 *       com.google.common.collect.Maps#asConverter Maps.asConverter}. For example, use this to
 *       create a "fake" converter for a unit test. It is unnecessary (and confusing) to <i>mock</i>
 *       the {@code Converter} type using a mocking framework.
 *   <li>Pass two lambda expressions or method references to the {@link #from from} factory method.

// It uses default values for all of the other fields (as BSD and GNU tar does).
func (tw *Writer) writeRawFile(name, data string, flag byte, format Format) error {
	tw.blk.reset()

	// Best effort for the filename.
	name = toASCII(name)
	if len(name) > nameSize {
		name = name[:nameSize]
	}
	name = strings.TrimRight(name, "/")

	var f formatter
	v7 := tw.blk.toV7()

    return LoadBalancingStrategy.valueOf(strategy.toUpperCase());
}
```

## 7. Testing Strategy

### 7.1 Unit Tests
```java
@Test
public void testChannelSelection() {
    ChannelManager manager = new ChannelManager(context, session);
    
    // Add test channels
    ChannelInfo channel1 = createTestChannel("channel1", 1000);  // 1Gbps
    ChannelInfo channel2 = createTestChannel("channel2", 10000); // 10Gbps