IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, () -> RequestParam.valueOf(badName));
        assertTrue(ex.getMessage().contains(badName), "Exception message should mention the bad name");
    }

    // Edge/Invalid: empty string is invalid for valueOf
    @ParameterizedTest
    @EmptySource
    @DisplayName("valueOf(\"\") throws IllegalArgumentException for empty input")

	var dateStr string
	err := d.DecodeElement(&dateStr, &startElement)
	if err != nil {
		return err
	}
	// While AWS documentation mentions that the date specified
	// must be present in ISO 8601 format, in reality they allow
	// users to provide RFC 3339 compliant dates.
	retDate, err := amztime.ISO8601Parse(dateStr)
	if err != nil {

    attributes:
      label: Has this idea, or one like it, been proposed before?
      description: If so, how does this proposal differ?
      placeholder: |
       Yes or No

       If yes, 
        1. Mention the related proposals 
        2. then describe how this proposal differs       
    validations:
      required: true

  - type: textarea
    id: error-handling-proposal
    attributes:

                Strings.getOEMBytes(TEST_STRING, mockConfig);
            });

            assertTrue(exception.getMessage().contains("Unsupported OEM encoding"), "Exception should mention unsupported encoding");
            assertTrue(exception.getCause() instanceof UnsupportedEncodingException, "Cause should be UnsupportedEncodingException");
        }
    }

    @Nested

	var dateStr string
	err := d.DecodeElement(&dateStr, &startElement)
	if err != nil {
		return err
	}
	// While AWS documentation mentions that the date specified
	// must be present in ISO 8601 format, in reality they allow
	// users to provide RFC 3339 compliant dates.
	expDate, err := time.Parse(time.RFC3339, dateStr)
	if err != nil {

        }
    }

    @Test
    public void testConvertWithNumbersAndSymbols() throws IOException {
        // Test convert with numbers and symbols
        String text = "123 456.789 #hashtag @mention";
        String field = "content";

        List<String> results = converter.convert(text, field, "en");

        assertNotNull(results);
    }

        try {
            FileUtil.readBytes(largeFile);
            fail("Expected IORuntimeException for large file");
        } catch (final IORuntimeException e) {
            assertTrue("Error message should mention file size", e.getMessage().contains("File too large"));
        }
    }

    /**
     * Test readBytes with file within size limit
     *
     * @throws Exception
     */
    @Test

## Déprécier des paramètres

Disons que vous ne vouliez plus utiliser ce paramètre désormais.

Il faut qu'il continue à exister pendant un certain temps car vos clients l'utilisent, mais vous voulez que la documentation mentionne clairement que ce paramètre est <abbr title="obsolète, recommandé de ne pas l'utiliser">déprécié</abbr>.

On utilise alors l'argument `deprecated=True` de `Query` :

            assertTrue(
                    description.toLowerCase().contains("compatibility")
                            || description.toLowerCase().contains("fix"),
                    "Description should mention compatibility or fix");
        }
    }

/// check | vérifier

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

Notez que l'erreur mentionne le point exact où la validation n'a pas réussi.

Ce qui est incroyablement utile au moment de développer et débugger du code qui interagit avec votre API.

///

## Documentation