### Question:
BaseDateTimeLib { protected String fixDateTimeFormat(String literal) { if (literal == null) { return null; } if (literal.startsWith("T")) { literal = literal.substring(1); } int timeZoneStartIndex = literal.length() - 5; if (0 <= timeZoneStartIndex && timeZoneStartIndex < literal.length()) { char timeZoneStart = literal.charAt(timeZoneStartIndex); if (timeZoneStart == '+' || timeZoneStart == '-') { String timeZoneOffset = literal.substring(timeZoneStartIndex + 1); literal = literal.substring(0, timeZoneStartIndex + 1) + timeZoneOffset.substring(0, 2) + ":" + timeZoneOffset.substring(2); } } return literal; }   static final DateTimeFormatter FEEL_DATE_FORMAT; static final DateTimeFormatter FEEL_TIME_FORMAT; static final DateTimeFormatter FEEL_DATE_TIME_FORMAT; }### Answer:
@Test public void testFixDateTimeFormat() { assertEquals("12:00:00", this.dateTimeLib.fixDateTimeFormat("T12:00:00")); assertEquals("12:00:00Z", this.dateTimeLib.fixDateTimeFormat("T12:00:00Z")); assertEquals("12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("T12:00:00+00:00")); assertEquals("12:00:00-00:00", this.dateTimeLib.fixDateTimeFormat("T12:00:00-00:00")); assertEquals("12:00:00-00:00", this.dateTimeLib.fixDateTimeFormat("T12:00:00-0000")); assertEquals("12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("T12:00:00+0000")); assertEquals("2016-08-01T12:00:00", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00")); assertEquals("2016-08-01T12:00:00Z", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00Z")); assertEquals("2016-08-01T12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00+00:00")); assertEquals("2016-08-01T12:00:00-00:00", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00-00:00")); assertEquals("2016-08-01T12:00:00-00:00", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00-0000")); assertEquals("2016-08-01T12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("2016-08-01T12:00:00+0000")); assertEquals("+999999999-08-01T12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("+999999999-08-01T12:00:00+0000")); assertEquals("-999999999-08-01T12:00:00+00:00", this.dateTimeLib.fixDateTimeFormat("-999999999-08-01T12:00:00+0000")); }