super(createTempFile());
        loadTestProperties();
    }

    private static File createTempFile() {
        try {
            File tempFile = File.createTempFile("test-system", ".properties");
            tempFile.deleteOnExit();
            return tempFile;
        } catch (IOException e) {
            logger.warn("Failed to create temp file, using null", e);
            return null;
        }
    }

* It has a <a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a> `async` interface.
* It exposes an actual Python <a href="https://docs.python.org/3/library/tempfile.html#tempfile.SpooledTemporaryFile" class="external-link" target="_blank">`SpooledTemporaryFile`</a> object that you can pass directly to other libraries that expect a file-like object.

### `UploadFile` { #uploadfile }

            }

            @Override
            public File createTempFile(String prefix, String suffix) {
                try {
                    File tempFile = File.createTempFile(prefix, suffix);
                    tempFile.deleteOnExit();
                    return tempFile;
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        };

            }

            @Override
            public File createTempFile(String prefix, String suffix) {
                try {
                    File tempFile = File.createTempFile(prefix, suffix);
                    tempFile.deleteOnExit();
                    return tempFile;
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        };

            }

            @Override
            public File createTempFile(String prefix, String suffix) {
                try {
                    File tempFile = File.createTempFile(prefix, suffix);
                    tempFile.deleteOnExit();
                    return tempFile;
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        };

    }

    private static class TestSystemHelper extends SystemHelper {
        File tempFile;

        @Override
        public File createTempFile(String prefix, String suffix) {
            try {
                tempFile = File.createTempFile(prefix, suffix);
                tempFile.deleteOnExit();
                return tempFile;
            } catch (IOException e) {
                throw new RuntimeException(e);

        @Override
        public File createTempFile(String prefix, String suffix) {
            try {
                File tempFile = File.createTempFile(prefix, suffix, tempDir);
                tempFile.deleteOnExit();
                return tempFile;
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }