## Responda perguntas no GitHub

Você pode acompanhar as <a href="https://github.com/fastapi/fastapi/issues" class="external-link" target="_blank">perguntas existentes</a> e tentar ajudar outros,            . 🤓

Ajudando a responder as questões de varias pessoas, você pode se tornar um [Expert em FastAPI](fastapi-people.md#especialistas){.internal-link target=_blank} oficial. 🎉

        assertEquals("pdf", fileTypeHelper.get("application/pdf"));
        assertEquals("text", fileTypeHelper.get("text/plain"));

        // Test non-existent mimetype returns default value
        assertEquals("others", fileTypeHelper.get("non/existent"));
    }

    public void test_get_withNullMimetype() {
        assertEquals("others", fileTypeHelper.get(null));
    }

    public void test_get_nullProperty() {
        // Test getting non-existent property
        try {
            fessConfig.get("non.existent.property");
            fail("Should throw exception for non-existent property");
        } catch (ConfigPropertyNotFoundException e) {
            // Expected exception
            assertTrue(e.getMessage().contains("non.existent.property"));
        }
    }

        // Test operations on empty service
        assertEquals(0, mockService.getRegistrationCount());
        assertFalse(mockService.hasRegistration("non-existent"));
        assertFalse(mockService.unregisterWitness("non-existent"));
        assertFalse(mockService.processHeartbeat("non-existent", 1));

        // Test registration with null/empty values
        String regId1 = mockService.registerWitness(null, "192.168.1.100", 1);

        UnknownHostException exception = assertThrows(UnknownHostException.class, () -> {
            nameServiceClient.getNbtByName("NONEXISTENT-FAST-FAIL");
        }, "Should throw UnknownHostException for non-existent NetBIOS name");

        // Verify the exception message indicates name resolution failure
        assertTrue(exception.getMessage().contains("NONEXISTENT") || exception.getMessage().contains("unknown")

        assertFalse(file.exists(), "Non-existent file should not exist");
        assertThrows(SmbException.class, () -> file.length(), "Getting length of non-existent file should throw exception");
        assertThrows(SmbException.class, () -> file.getInputStream(), "Getting input stream of non-existent file should throw exception");
    }

    @Test

		}
	}
}

func TestXLStorageIsDirEmpty(t *testing.T) {
	tmp := t.TempDir()

	// Should give false on non-existent directory.
	dir1 := slashpath.Join(tmp, "non-existent-directory")
	if isDirEmpty(dir1, true) {
		t.Error("expected false for non-existent directory, got true")
	}

	// Should give false for not-a-directory.
	dir2 := slashpath.Join(tmp, "file")

     * @return True if a previous page exists, false otherwise.
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets the existence of a previous page.
     * @param existPrePage True if a previous page exists.
     */
    public void setExistPrePage(final boolean existPrePage) {
        this.existPrePage = existPrePage;
    }

    /**

     *
     * @return true if a previous page exists, false otherwise.
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets the flag for the existence of a previous page.
     *
     * @param existPrePage true if a previous page exists.
     */
    public void setExistPrePage(final boolean existPrePage) {
        this.existPrePage = existPrePage;
    }

package org.codelibs.core.beans.util;

import java.util.LinkedHashMap;

import org.codelibs.core.exception.IllegalKeyOfBeanMapException;

/**
 * A map with String keys that throws an exception when accessing (get) a non-existent key.
 *
 * @author higa
 */
public class BeanMap extends LinkedHashMap<String, Object> {

    private static final long serialVersionUID = 1;

    /**
     * Creates a new {@link BeanMap}.
     */