final byte[] result = FileUtil.readBytes(emptyFile);
        assertThat(result.length, is(0));
    }

    /**
     * Test readBytes with null file throws exception
     */
    @Test
    public void testReadBytes_NullFile() {
        try {
            FileUtil.readBytes(null);
            fail("Expected IllegalArgumentException");

				t.Errorf("allocation occurred during write")
			}
			// Check that buffer has correct data.
			if !Equal(buf.Bytes()[0:startLen-readBytes], xBytes[readBytes:]) {
				t.Errorf("bad initial data at %d %d", startLen, growLen)
			}
			if !Equal(buf.Bytes()[startLen-readBytes:startLen-readBytes+growLen], yBytes) {
				t.Errorf("bad written data at %d %d", startLen, growLen)
			}
		}
	}
}

	if b.off > 0 {
		b.off--
	}
	return nil
}

// ReadBytes reads until the first occurrence of delim in the input,
// returning a slice containing the data up to and including the delimiter.
// If ReadBytes encounters an error before finding a delimiter,
// it returns the data read before the error and the error itself (often [io.EOF]).
// ReadBytes returns err != nil if and only if the returned data does not end in
// delim.

     * @return A byte array containing the contents of the file.
     * @throws IORuntimeException if the file is larger than {@value #MAX_BUF_SIZE} bytes
     */
    public static byte[] readBytes(final File file) {
        return readBytes(file, MAX_BUF_SIZE);
    }

    /**
     * Reads the contents of a file into a byte array and returns it with a custom size limit.
     * <p>

            }
        }
        try {
            return new String(FileUtil.readBytes(outputFile), outputEncoding);
        } catch (final UnsupportedEncodingException e) {
            return new String(FileUtil.readBytes(outputFile), Constants.UTF_8_CHARSET);
        }
    }

    /**
     * Gets the extractor for the specified file extension.
     *

        final String jspType = "view";
        final File jspFile = getJspFile(form.fileName, jspType);
        try {
            form.content = encodeJsp(new String(FileUtil.readBytes(jspFile), Constants.UTF_8));
        } catch (final UnsupportedEncodingException e) {
            throw new FessSystemException("Invalid encoding", e);
        }
        saveToken();
        return asEditHtml(form);

            // store to a file
            CopyUtil.copy(in, inputFile);

            executeCommand(inputFile, outputFile);

            final ExtractData extractData = new ExtractData(new String(FileUtil.readBytes(outputFile), outputEncoding));
            if (StringUtil.isNotBlank(resourceName)) {
                extractData.putValues("resourceName", new String[] { resourceName });
            }

            return extractData;