public static FormattingTuple format(String messagePattern, Object arg) {
        return arrayFormat(messagePattern, new Object[]{arg});
    }
@Test
    public void verifyOneParameterIsHandledCorrectly() {
        String result = MessageFormatter.format("Value is {}.", 3).getMessage();
        assertEquals("Value is 3.", result);

        result = MessageFormatter.format("Value is {", 3).getMessage();
        assertEquals("Value is {", result);

        result = MessageFormatter.format("{} is larger than 2.", 3).getMessage();
        assertEquals("3 is larger than 2.", result);

        result = MessageFormatter.format("No subst", 3).getMessage();
        assertEquals("No subst", result);

        result = MessageFormatter.format("Incorrect {subst", 3).getMessage();
        assertEquals("Incorrect {subst", result);

        result = MessageFormatter.format("Value is {bla} {}", 3).getMessage();
        assertEquals("Value is {bla} 3", result);

        result = MessageFormatter.format("Escaped \\{} subst", 3).getMessage();
        assertEquals("Escaped {} subst", result);

        result = MessageFormatter.format("{Escaped", 3).getMessage();
        assertEquals("{Escaped", result);

        result = MessageFormatter.format("\\{}Escaped", 3).getMessage();
        assertEquals("{}Escaped", result);

        result = MessageFormatter.format("File name is {{}}.", "App folder.zip").getMessage();
        assertEquals("File name is {App folder.zip}.", result);

        // escaping the escape character
        result = MessageFormatter.format("File name is C:\\\\{}.", "App folder.zip").getMessage();
        assertEquals("File name is C:\\App folder.zip.", result);
    }