@Test
public void shouldDoubleQuoteString()
{

    String string1 = StringHelper.doubleQuoteIfNecessary(" ");
    assertThat(string1, is("\" \""));
    String string2 = StringHelper.doubleQuoteIfNecessary("hello");
    assertThat(string2, is("hello"));
    String string3 = StringHelper.doubleQuoteIfNecessary("hello world");
    assertThat(string3, is("\"hello world\""));
}