assertEquals(123, dataStoreParams.get("key2"));

        dataStoreParams.put("key3", null);
        assertNull(dataStoreParams.get("key3"));
    }

    // Test get for non-existent key
    @Test
    public void test_getNonExistentKey() {
        assertNull(dataStoreParams.get("nonexistent"));
    }

    // Test getAsString with String value
    @Test

    /**
     * Changes current cwd, if the new path is existing directory.
     *
     * @throws NullPointerException if {@code seg} is {@code null}.
     * @throws IllegalArgumentException if {@code seg} leads to non-existent directory.
     */
    public void change(String seg) {
        Path newCwd = resolve(seg);
        if (Files.isDirectory(newCwd)) {
            this.directory = newCwd;
        } else {

        tempFile = new File(Curl.tmpDir, "non-existent-file.tmp");
        assertFalse(tempFile.exists());

        ContentCache cache = new ContentCache(tempFile);

        // Should throw IOException when file doesn't exist
        try {
            cache.close();
            fail("Expected IOException for non-existent file");
        } catch (IOException e) {

	"fmt"
	"os"
	"path"
	"path/filepath"
	"runtime"
	"sort"
	"testing"
)

// Test to check for different input arguments.
func TestReadDirFail(t *testing.T) {
	// Check non existent directory.
	if _, err := readDir("/tmp/non-existent-directory"); err != errFileNotFound {
		t.Fatalf("expected = %s, got: %s", errFileNotFound, err)
	}

	file := path.Join(os.TempDir(), "issue")

# Manejo de Errores { #handling-errors }

Existen muchas situaciones en las que necesitas notificar un error a un cliente que está usando tu API.

Este cliente podría ser un navegador con un frontend, un código de otra persona, un dispositivo IoT, etc.

Podrías necesitar decirle al cliente que:

* El cliente no tiene suficientes privilegios para esa operación.
* El cliente no tiene acceso a ese recurso.
* El ítem al que el cliente intentaba acceder no existe.

Pendant le développement, j'ai également contribué à [**Starlette**](https://www.starlette.dev/), l'autre exigence clé.

## Développement { #development }

		switch {
		case isSysErrNotDir(err) && !osIsNotExist(err):
			// Windows can have both isSysErrNotDir(err) and osIsNotExist(err) returning
			// true if the source file path contains an non-existent directory. In that case,
			// we want to return errFileNotFound instead, which will honored in subsequent
			// switch cases
			return errFileAccessDenied
		case isSysErrPathNotFound(err):

        assertNull(result);
    }

    @Test
    void testGetByNameWithNonExistentFile() {
        // Test with non-existent file
        when(mockConfig.getLmHostsFileName()).thenReturn("/non/existent/lmhosts");

        NbtAddress result = lmhosts.getByName("TEST_HOST", mockContext);

        assertNull(result);
    }

    @Test

        assertEquals("script for engine2", engine2.getLastScript());
    }

    @Test
    public void test_execute_withInvalidScriptType() {
        // Try to execute with non-existent script type
        try {
            scriptExecutor.execute("nonexistent", "some script");
            fail("Expected ScriptEngineException");
        } catch (ScriptEngineException e) {

    @Test
    public void test_propertyNotFound() {
        try {
            fessConfig.get("non.existent.property");
            fail("Should throw ConfigPropertyNotFoundException");
        } catch (ConfigPropertyNotFoundException e) {
            assertEquals("non.existent.property", e.getMessage());
        }
    }

    // Test isExtensionAllowed method
    /*