}
  }

  public void testEqual() throws IOException {
    try (FileSystem fs = Jimfs.newFileSystem(Configuration.unix())) {
      Path fooPath = fs.getPath("foo");
      Path barPath = fs.getPath("bar");
      MoreFiles.asCharSink(fooPath, UTF_8).write("foo");
      MoreFiles.asCharSink(barPath, UTF_8).write("barbar");

      assertThat(MoreFiles.equal(fooPath, barPath)).isFalse();

 *
 * {@snippet :
 * Splitter.on(',').split("foo,bar,qux")
 * }
 *
 * ... produces an {@code Iterable} containing {@code "foo"}, {@code "bar"} and {@code "qux"}, in
 * that order.
 *
 * <p>By default, {@code Splitter}'s behavior is simplistic and unassuming. The following
 * expression:
 *
 * {@snippet :
 * Splitter.on(',').split(" foo,,,  bar ,")
 * }
 *

/**
 * Tester for equals() and hashCode() methods of a class.
 *
 * <p>The simplest use case is:
 *
 * <pre>
 * new EqualsTester().addEqualityGroup(foo).testEquals();
 * </pre>
 *
 * <p>This tests {@code foo.equals(foo)}, {@code foo.equals(null)}, and a few other operations.
 *
 * <p>For more extensive testing, add multiple equality groups. Each group should contain objects

 *     fieldDesc.getFieldValue(foo); // Retrieve the value of Foo's field
 * }
 *
 * for (ConstructorDesc constructorDesc : beanDesc.getConstructorDescs()) {
 *     constructorDesc.newInstance(...); // Create an instance of Foo
 * }
 *
 * for (String methodName : beanDesc.getMethodNames()) {
 *     for (MethodDesc methodDesc : beanDesc.getMethodDescs(methodName)) {
 *         methodDesc.invoke(foo, ...); // Invoke Foo's method
 *     }

O valor do parâmetro de path `item_id` será passado para a sua função como o argumento `item_id`.

Então, se você executar este exemplo e acessar [http://127.0.0.1:8000/items/foo](http://127.0.0.1:8000/items/foo), você verá uma resposta:

```JSON
{"item_id":"foo"}
```

## Parâmetros de path com tipos { #path-parameters-with-types }

Você pode declarar o tipo de um parâmetro de path na função, usando as anotações de tipo padrão do Python:

通过浏览器访问 [http://127.0.0.1:8000/items/foo](http://127.0.0.1:8000/items/foo)，接收如下 HTTP 错误信息：

```JSON
{
  "detail": [
    {
      "type": "int_parsing",
      "loc": [
        "path",
        "item_id"
      ],
      "msg": "Input should be a valid integer, unable to parse string as an integer",
      "input": "foo"
    }
  ]
}
```

这是因为路径参数 `item_id` 的值（`"foo"`）的类型不是 `int`。

KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<project>
  <groupId>foo</groupId>
  <artifactId>foo</artifactId>
  <version>99.44</version>
  <packaging>bleh</packaging>

items = {}


@app.on_event("startup")
async def startup_event():
    items["foo"] = {"name": "Fighters"}
    items["bar"] = {"name": "Tenders"}


@app.get("/items/{item_id}")
async def read_items(item_id: str):
    return items[item_id]


def test_read_items():
    with TestClient(app) as client:
        response = client.get("/items/foo")
        assert response.status_code == 200

KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<project>
  <modelVersion>4.0.0</modelVersion>
  <artifactId>foo</artifactId>
  <groupId>foo</groupId>
  <version>99.44</version>
  <packaging>bleh</packaging>
  <repositories>
    <repository>

    </repository>
  </repositories>
  <pluginRepositories>
    <pluginRepository>

    message: str


app = FastAPI()


@app.get("/items/{item_id}", response_model=Item, responses={404: {"model": Message}})
async def read_item(item_id: str):
    if item_id == "foo":
        return {"id": "foo", "value": "there goes my hero"}