generator.saveImage(input, outputFile);
            }
            assertImageSize(outputFile, 100, 66);

            imagePath = "thumbnail/600x400.jpg";
            try (ImageInputStream input = ImageIO.createImageInputStream(classLoader.getResourceAsStream(imagePath))) {
                generator.saveImage(input, outputFile);
            }

    }

    public void test_generate() {
        // Test generate method is called correctly
        generator = new TestThumbnailGenerator();
        File outputFile = new File("test.jpg");

        assertFalse(generator.isGenerateCalled());
        assertTrue(generator.generate("id123", outputFile));
        assertTrue(generator.isGenerateCalled());
    }

    public void test_destroy() {

    public void test_generate() {
        // Initialize without container
        emptyGenerator = new EmptyGenerator();

        // Test that generate always returns false
        File outputFile = new File("test.jpg");
        assertFalse(emptyGenerator.generate("thumbnailId", outputFile));
        assertFalse(emptyGenerator.generate(null, outputFile));
        assertFalse(emptyGenerator.generate("thumbnailId", null));

        urlFilter.init(sessionId);

        urlFilter.addExclude(".*\\.(jpg|png|gif)$");

        assertTrue(urlFilter.match("https://example.com/page.html"));
        assertTrue(urlFilter.match("https://example.com/document.pdf"));
        assertFalse(urlFilter.match("https://example.com/image.jpg"));
        assertFalse(urlFilter.match("https://example.com/photo.png"));

                case FessConfig.APP_ENCRYPT_PROPERTY_PATTERN:
                    return ".*password|.*key|.*token|.*secret";
                case FessConfig.APP_EXTENSION_NAMES:
                    return "jpg,jpeg,gif,png";

                case FessConfig.JOB_MAX_CRAWLER_PROCESSES:
                    return "3";
                case FessConfig.MAX_LOG_OUTPUT_LENGTH:
                    return "4000";

        thumbnailManager.setImageExtention("jpg");
        thumbnailManager.setSplitSize(5);
        thumbnailManager.setSplitHashSize(20);

        String docid = "1234567890abcdef";
        String filename = thumbnailManager.getImageFilename(docid);
        assertNotNull(filename);
        assertTrue(filename.endsWith(".jpg"));
        assertTrue(filename.contains(docid));
    }

    "tags": [
        "rock",
        "metal",
        "bar"
    ],
    "images": [
        {
            "url": "http://example.com/baz.jpg",
            "name": "The Foo live"
        },
        {
            "url": "http://example.com/dave.jpg",
            "name": "The Baz"
        }
    ]
}
```

/// info

Notice how the `images` key now has a list of image objects.

        final String tempPath = "/tmp/source.pdf";
        final String outputPath = "/tmp/thumbnail.jpg";

        final String expandedCommand = testCommand.replace("${url}", tempPath).replace("${outputFile}", outputPath);

        assertEquals("convert /tmp/source.pdf -resize 100x100 /tmp/thumbnail.jpg", expandedCommand);
        assertFalse("Expanded command should not contain variables", expandedCommand.contains("${"));

        assertTrue(exception instanceof java.io.Serializable);
    }

    public void test_toString() {
        // Test toString method
        String message = "Thumbnail generation failed for file.jpg";
        ThumbnailGenerationException exception = new ThumbnailGenerationException(message);

        String toStringResult = exception.toString();

### `UploadFile` { #uploadfile }

`UploadFile` has the following attributes:

* `filename`: A `str` with the original file name that was uploaded (e.g. `myimage.jpg`).
* `content_type`: A `str` with the content type (MIME type / media type) (e.g. `image/jpeg`).