LocalDateTimeStringConverterTest fails when default locale is different to en_US

FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
The LocalDateTimeStringConverterTests expect that the default locale is en_US. When executing them on a machine with default locale de_DE, the tests fail as follows:

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_parser[0] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_parser(LocalDateTimeStringConverterTest.java:144)

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_null_parser[0] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_null_parser(LocalDateTimeStringConverterTest.java:152)

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_parser[1] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_parser(LocalDateTimeStringConverterTest.java:144)

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_null_parser[1] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_null_parser(LocalDateTimeStringConverterTest.java:152)

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_parser[2] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_parser(LocalDateTimeStringConverterTest.java:144)

test.javafx.util.converter.LocalDateTimeStringConverterTest > converter_with_specified_formatter_and_null_parser[2] FAILED
   org.junit.ComparisonFailure: expected:<12 Januar[y] 1985, 12:34:56> but was:<12 Januar[] 1985, 12:34:56>
       at org.junit.Assert.assertEquals(Assert.java:123)
       at org.junit.Assert.assertEquals(Assert.java:145)
       at test.javafx.util.converter.LocalDateTimeStringConverterTest.converter_with_specified_formatter_and_null_parser(LocalDateTimeStringConverterTest.java:152)

This can be fixed by adding an appropriate setup step that initialized the default locale to en_US as follows:

@BeforeClass
public static void initDefaultLocale(){
  // tests require that default locale is English
  Locale.setDefault(Locale.ENGLISH);
}


REPRODUCIBILITY :
This bug can be reproduced always.