// parseable, but the spec doesn't seem to say which exception is thrown for an invalid radix.
    // In contrast to the JVM, Kotlin native throws an Illegal argument exception in this case
    // (which seems to make more sense).
    try {
      UnsignedInts.parseUnsignedInt("0", Character.MIN_RADIX - 1);
      fail();
    } catch (NumberFormatException expected) {

## Caso de Uso { #use-case }

Empecemos con un ejemplo de **caso de uso** y luego veamos cómo resolverlo con esto.

Imaginemos que tienes algunos **modelos de machine learning** que quieres usar para manejar requests. 🤖

                switch (xObj.type()) {
                case BOOLEAN:
                    final Boolean b = (Boolean) xObj.value();
                    putResultDataBody(dataMap, entry.getKey(), b.toString());
                    break;
                case NUMBER:
                    final Number d = (Number) xObj.value();

 *   <li>{@code stringConverter().reverse().convert(1.0)} returns the string {@code "1.0"} --
 *       <i>not</i> the same string ({@code "1.00"}) we started with
 * </ol>
 *
 * <p>Note that it should still be the case that the round-tripped and original objects are
 * <i>similar</i>.
 *
 * <h3>Nullability</h3>
 *
 * <p>A converter always converts {@code null} to {@code null} and non-null references to non-null

        testData.add(createRelatedQuery("Java", new String[] { "Programming", "Tutorial" }, ""));
        mockBhv.setTestData(testData);

        relatedQueryHelper.load();

        // Test case insensitive matching
        String[] results = relatedQueryHelper.getRelatedQueries("java");
        assertEquals(2, results.length);
        assertEquals("Programming", results[0]);

            // Then
            assertEquals(4, read1);
            assertEquals(4, read2);
        }
    }

    @Nested
    @DisplayName("Edge case tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle maximum buffer index")
        void testMaxBufferIndex() throws SMBProtocolDecodingException {
            // Given

                LogLevelRecorder.Level level =
                        switch (logLevelThreshold.toLowerCase(Locale.ENGLISH)) {
                            case "warn", "warning" -> LogLevelRecorder.Level.WARN;
                            case "error" -> LogLevelRecorder.Level.ERROR;
                            default ->
                                throw new IllegalArgumentException(

            String result = notification.toString();
            assertTrue(result.contains("oplockLevel=" + oplockLevel));
        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle minimum valid buffer size")
        void testMinimumBufferSize() throws Exception {

因為這些程式碼分別在應用開始接收請求**之前**與**完成**處理請求之後執行，所以涵蓋了整個應用的**生命週期**（「lifespan」這個詞稍後會很重要 😉）。

這對於為整個應用設定需要**共用**於多個請求的**資源**，以及在之後進行**清理**，非常有用。比如資料庫連線池、或載入一個共用的機器學習模型。

## 使用情境 { #use-case }

先從一個**使用情境**開始，然後看看如何用這個機制解決。

想像你有一些要用來處理請求的**機器學習模型**。🤖

同一組模型會在多個請求間共用，所以不是每個請求或每個使用者各有一個模型。

再想像一下，載入模型**需要一段時間**，因為它必須從**磁碟**讀取大量資料。所以你不想在每個請求都做一次。

                ],
            ),
        ):
            return item

    # TODO: enable these tests once/if Form(embed=False) is supported
    # TODO: In that case, define if File() should support example/examples too
    # @app.post("/form_example")
    # def form_example(firstname: str = Form(example="John")):
    #     return firstname

    # @app.post("/form_examples")