Code review comment: hi, silver These two cases are meant to explain the critical scenario

Code before review:
public void dateFormat() {
Locale.setDefault(Locale.ENGLISH);
ConstantOperator testDate = ConstantOperator.createDatetime(LocalDateTime.of(2001, 1, 9, 13, 4, 5));
assertEquals("1",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%c")).getVarchar());
assertEquals("09",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%d")).getVarchar());
assertEquals("9",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%e")).getVarchar());
assertEquals("13",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%H")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%h")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%I")).getVarchar());
assertEquals("04",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%i")).getVarchar());
assertEquals("009",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%j")).getVarchar());
assertEquals("13",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%k")).getVarchar());
assertEquals("1",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%l")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%m")).getVarchar());
assertEquals("05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%S")).getVarchar());
assertEquals("05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%s")).getVarchar());
assertEquals("13:04:05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%T")).getVarchar());
assertEquals("02",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("2001",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%Y")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%y")).getVarchar());
assertEquals("%",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%%")).getVarchar());
assertEquals("foo",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("foo")).getVarchar());
assertEquals("g",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%g")).getVarchar());
assertEquals("4",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%4")).getVarchar());
assertEquals("02",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("yyyy",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy")).getVarchar());
assertEquals("20010109",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyyMMdd")).getVarchar());
assertEquals("yyyyMMdd HH:mm:ss",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyyMMdd HH:mm:ss"))
.getVarchar());
assertEquals("HH:mm:ss",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("HH:mm:ss")).getVarchar());
assertEquals("2001-01-09",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy-MM-dd"))
.getVarchar());
assertEquals("2001-01-09 13:04:05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy-MM-dd HH:mm:ss"))
.getVarchar());
assertEquals("2001-01-09",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2001, 1, 9, 13, 4, 5)),
ConstantOperator.createVarchar("%Y-%m-%d"))
.getVarchar());
assertEquals("123000", ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2022, 3, 13, 0, 0, 0, 123000000)),
ConstantOperator.createVarchar("%f")).getVarchar());
assertEquals("asdfafdfsçv",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("asdfafdfsçv")).getVarchar());
Assert.assertNotEquals("53",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDatetime(LocalDateTime.of(2024, 12, 31, 22, 0, 0)),
ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDatetime(LocalDateTime.of(2024, 12, 31, 22, 0, 0)),
ConstantOperator.createVarchar("%v")).getVarchar());
Assert.assertThrows("%a not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%a")).getVarchar());
Assert.assertThrows("%b not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%b")).getVarchar());
Assert.assertThrows("%M not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%M")).getVarchar());
Assert.assertThrows("%W not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%W")).getVarchar());
Assert.assertThrows("%x not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%x")).getVarchar());
Assert.assertThrows("%w not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%w")).getVarchar());
Assert.assertThrows("%p not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%p")).getVarchar());
Assert.assertThrows("%r not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%r")).getVarchar());
Assert.assertThrows(IllegalArgumentException.class, () -> ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("%U")).getVarchar());
Assert.assertThrows(IllegalArgumentException.class, () -> ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("%X")).getVarchar());
assertTrue(ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar(""))
.isNull());
assertEquals("  ",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("  "))
.getVarchar());
}

Line under review: ConstantOperator.createVarchar("%v")).getVarchar());

Code after addressing the review:
public void dateFormat() {
Locale.setDefault(Locale.ENGLISH);
ConstantOperator testDate = ConstantOperator.createDatetime(LocalDateTime.of(2001, 1, 9, 13, 4, 5));
assertEquals("1",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%c")).getVarchar());
assertEquals("09",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%d")).getVarchar());
assertEquals("9",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%e")).getVarchar());
assertEquals("13",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%H")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%h")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%I")).getVarchar());
assertEquals("04",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%i")).getVarchar());
assertEquals("009",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%j")).getVarchar());
assertEquals("13",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%k")).getVarchar());
assertEquals("1",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%l")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%m")).getVarchar());
assertEquals("05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%S")).getVarchar());
assertEquals("05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%s")).getVarchar());
assertEquals("13:04:05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%T")).getVarchar());
assertEquals("02",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("2001",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%Y")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%y")).getVarchar());
assertEquals("%",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%%")).getVarchar());
assertEquals("foo",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("foo")).getVarchar());
assertEquals("g",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%g")).getVarchar());
assertEquals("4",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%4")).getVarchar());
assertEquals("02",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("yyyy",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy")).getVarchar());
assertEquals("20010109",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyyMMdd")).getVarchar());
assertEquals("yyyyMMdd HH:mm:ss",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyyMMdd HH:mm:ss"))
.getVarchar());
assertEquals("HH:mm:ss",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("HH:mm:ss")).getVarchar());
assertEquals("2001-01-09",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy-MM-dd"))
.getVarchar());
assertEquals("2001-01-09 13:04:05",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("yyyy-MM-dd HH:mm:ss"))
.getVarchar());
assertEquals("2001-01-09",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2001, 1, 9, 13, 4, 5)),
ConstantOperator.createVarchar("%Y-%m-%d"))
.getVarchar());
assertEquals("123000", ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2022, 3, 13, 0, 0, 0, 123000000)),
ConstantOperator.createVarchar("%f")).getVarchar());
assertEquals("asdfafdfsçv",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("asdfafdfsçv")).getVarchar());
Assert.assertNotEquals("53",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDatetime(LocalDateTime.of(2024, 12, 31, 22, 0, 0)),
ConstantOperator.createVarchar("%v")).getVarchar());
assertEquals("01",
ScalarOperatorFunctions.dateFormat(ConstantOperator.createDatetime(LocalDateTime.of(2024, 12, 31, 22, 0, 0)),
ConstantOperator.createVarchar("%v")).getVarchar());
Assert.assertThrows("%a not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%a")).getVarchar());
Assert.assertThrows("%b not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%b")).getVarchar());
Assert.assertThrows("%M not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%M")).getVarchar());
Assert.assertThrows("%W not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%W")).getVarchar());
Assert.assertThrows("%x not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%x")).getVarchar());
Assert.assertThrows("%w not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%w")).getVarchar());
Assert.assertThrows("%p not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%p")).getVarchar());
Assert.assertThrows("%r not supported in date format string", IllegalArgumentException.class, () ->
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("%r")).getVarchar());
Assert.assertThrows(IllegalArgumentException.class, () -> ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("%U")).getVarchar());
Assert.assertThrows(IllegalArgumentException.class, () -> ScalarOperatorFunctions
.dateFormat(ConstantOperator.createDate(LocalDateTime.of(2020, 2, 21, 13, 4, 5)),
ConstantOperator.createVarchar("%X")).getVarchar());
assertTrue(ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar(""))
.isNull());
assertEquals("  ",
ScalarOperatorFunctions.dateFormat(testDate, ConstantOperator.createVarchar("  "))
.getVarchar());
}