Smb2IoctlResponse resp = mock(Smb2IoctlResponse.class);
        when(resp.getOutputLength()).thenReturn(42);
        when(tree.send(any(Smb2IoctlRequest.class), any())).thenReturn(resp);

        byte[] out = new byte[10];
        int read = target.sendrecv(new byte[] { 9, 8, 7 }, 0, 3, out, 1024);
        assertEquals(42, read);

        // Verify we issued an SMB2 IOCTL

            // Given
            byte[] buffer = new byte[100];
            when(mockAllocInfo.decode(any(byte[].class), anyInt(), anyInt())).thenReturn(42);

            // When
            int result = mockAllocInfo.decode(buffer, 10, 50);

            // Then
            assertEquals(42, result);
            verify(mockAllocInfo, times(1)).decode(buffer, 10, 50);
        }

        @Test

  ]
}
```

Çünkü burada `item_id` yol parametresi `int` tipinde bir değer beklerken `"foo"` yani `string` tipinde bir değer almıştı.

Aynı hata <a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a> sayfasında olduğu gibi `int` yerine `float` bir değer verseydik de ortaya çıkardı.

/// check | Ek bilgi

```
тому що параметр шляху має значення `"foo"`, яке не є типом `int`.

Таку саму помилку отримаємо, якщо передати `float` замість `int`, як бачимо, у цьому прикладі: <a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a>

/// check | Примітка

Отже,  **FastAPI** надає перевірку типів з таким самим оголошенням типу в Python.

        assertArrayEquals(mic, t.getMechanismListMIC(), "mechanismListMIC should round-trip");

        // Document current behavior: no defensive copy (reference exposed)
        mic[1] = 42;
        assertEquals(42, t.getMechanismListMIC()[1], "no defensive copy; reflects external mutation");
    }

    @Test
    @DisplayName("parse sets mechanismToken and flags parsed")
    void parseSetsMechanismToken() throws IOException {

        return buf;
    }

    @Test
    @DisplayName("constructor initialises command and parameters correctly")
    void testConstructorInitialisesFields() throws Exception {
        int level = 42;
        Trans2QueryFSInformation cmd = new Trans2QueryFSInformation(level);
        // constants are defined on SmbComTransaction, inherited via
        // ServerMessageBlock.

    assertEquals(
        "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",
        sha1.putString("The quick brown fox jumps over the lazy dog", UTF_8).hash().toString());
    assertThrows(IllegalStateException.class, () -> sha1.putInt(42));
  }

  public void testHashTwice() {
    Hasher sha1 = Hashing.sha1().newHasher();

    assertEquals(
        "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",

        String id = "custom-id";
        builder.setSettingsIndexName("CUSTOM_INDEX")
                .addInitialSettings("custom.key1", "value1")
                .addInitialSettings("custom.key2", 42)
                .scrollTimeout("100s")
                .searchTimeout("50s")
                .indexTimeout("200s")
                .bulkTimeout("300s")
                .indicesTimeout("150s")

    ByteSource source = out.asByteSource();

    out.write(data);
    assertThat(source.read()).isEqualTo(data);

    out.close();
    assertThrows(IOException.class, () -> out.write(42));

    // Verify that write had no effect
    assertThat(source.read()).isEqualTo(data);
    out.reset();
  }

  public void testReset() throws Exception {
    byte[] data = newPreFilledByteArray(100);

La même erreur se produira si vous passez un nombre flottant (`float`) et non un entier, comme ici
<a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a>.


/// check | vérifier

Donc, avec ces mêmes déclarations de type Python, **FastAPI** vous fournit de la validation de données.