```JSON
{
  "item": "The Foo Wrestlers"
}
```

Mais si le client demande `http://example.com/items/bar` (un `item_id` inexistant « bar »), il recevra un code d'état HTTP 404 (l'erreur « not found ») et une réponse JSON :

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Astuce

    }

    @Test
    public void test_replaceUrl_withNonExistentSessionId() {
        final String url = "file:///home/user/";
        assertEquals(url, pathMappingHelper.replaceUrl("nonexistent", url));
    }

    @Test
    public void test_replaceUrl_withEmptyList() {
        final String sessionId = "test";
        final List<PathMapping> pathMappingList = new ArrayList<PathMapping>();

func TestNonExistentBucketOperations(t *testing.T) {
	ExecObjectLayerTest(t, testNonExistentBucketOperations)
}

// Tests validate that bucket operation on non-existent bucket fails.
func testNonExistentBucketOperations(obj ObjectLayer, instanceType string, t TestErrHandler) {
	var opts ObjectOptions

    }

    @Test
    public void test_getMatchedLabelValueSet_emptyPatternList() {
        // Test with empty pattern list
        Set<String> result = labelTypeHelper.getMatchedLabelValueSet("/nonexistent/path");
        assertNotNull(result);
    }

    @Test
    public void test_getMatchedLabelValueSet_nullPath() {
        try {
            labelTypeHelper.getMatchedLabelValueSet(null);

    }

    @Test
    public void test_getMapValue_missing() {
        final Map<String, Object> map = Map.of("key", "value");
        assertNull(coordinatorHelper.getMapValue(map, "nonexistent"));
    }

    @Test
    public void test_getListValue_exists() {
        final List<Map<String, Object>> list = List.of(Map.of("id", "1"), Map.of("id", "2"));

		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):

    }

    @Test
    void testInitIOExceptionHandling(@TempDir Path tempDir) {
        // Test handling IOException when loading jcifs.properties
        Path nonExistentPath = tempDir.resolve("nonexistent.properties");
        System.setProperty("jcifs.properties", nonExistentPath.toString());

        // Expect no exception to be thrown, but an error logged (which we can't directly assert here)

        ComponentUtil.register(mockJobManager, JobManager.class.getCanonicalName());

        final ScheduledJob scheduledJob = new ScheduledJob();
        scheduledJob.setId("nonexistent-job");

        try {
            scheduledJob.start(Map.of(Constants.JOB_LOG_ID, "some-id"));
            fail("Expected JobNotFoundException");
        } catch (final JobNotFoundException e) {

		t.Fatalf("Unable to create temporary file. %v", err)
	}
	defer os.Remove(tempFile5)

	testCases := []struct {
		certFile          string
		expectedResultLen int
		expectedErr       bool
	}{
		{"nonexistent-file", 0, true},
		{tempFile1, 0, true},
		{tempFile2, 0, true},
		{tempFile3, 0, true},
		{tempFile4, 1, false},
		{tempFile5, 2, false},
	}

	for _, testCase := range testCases {

        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