[Retire FX] Port functional test scenarios for globalization

[Muskan Gupta (muskan124947)]

Migrate FX Globalization Tests to JUnit 5

Migrates the legacy FX globalization test cases to JUnit 5 parameterized tests in a new globalization/ package under src/test/java/com/microsoft/sqlserver/jdbc/.

Files Added

File	Description
GlobalizationTestData.java	Shared constants, enums (SendMethod, ReceiveMethod, CharacterType, CharacterPosition), language samples, collations, and @MethodSource providers
GlobalizationCollationTest.java	Collation round-trip, MBCS conversion, _SC collations, Turkish CP1254
GlobalizationLocaleTest.java	Unicode identifiers in queries, case sensitivity, Calendar with locales, getString across JVM locales
GlobalizationUTF16Test.java	UTF-16 round-trip with 15 send × 18 receive methods × 4 char types × 2 positions (pairwise coverage)

FX Test Case Mapping

FX Test Case	New Test Method	File
TCCollations.testSetters + testGetters	testCollationSetterAndGetter	GlobalizationCollationTest
TCServerCollations.test1	testServerCollationRoundTrip	GlobalizationCollationTest
TCServerCollations.test2 (VSTS #234287)	testTurkishCP1254Character	GlobalizationCollationTest
TCCollations (extended)	testCollationColumnSizes	GlobalizationCollationTest
TCQueries.test1	testGlobalizedIdentifiers	GlobalizationLocaleTest
TCQueries.test2	testPureUnicodeLiteral	GlobalizationLocaleTest
TCCaseSensitivity.test1	testCaseSensitivity	GlobalizationLocaleTest
TCCalendar.test1	testCalendarLocale	GlobalizationLocaleTest
TCCalendar.test2	testCalendarOutputParams	GlobalizationLocaleTest
TCLocales.test	testGetStringWithLocale	GlobalizationLocaleTest
TCDenaliUTF16 (VSTS #765740)	testUTF16RoundTrip	GlobalizationUTF16Test

Test Scenario Counts

File	Test Method	Scenarios	Source
GlobalizationCollationTest	testCollationSetterAndGetter	20	10 languages × 2 SSPAU values
	testServerCollationRoundTrip	~800+	Dynamic — all _SC collations from sys.fn_helpcollations()
	testTurkishCP1254Character	1	Single @Test
	testCollationColumnSizes	10	10 languages × 3 sizes (loop inside)
GlobalizationLocaleTest	testGlobalizedIdentifiers	9	10 languages minus Arabic (RTL)
	testPureUnicodeLiteral	9	Same provider as above
	testCaseSensitivity	3	English, German, Russian (×4 variations internally)
	testCalendarLocale	20	10 locales × 2 SQL types (TIME, DATETIME2)
	testCalendarOutputParams	20	10 locales × 2 SQL types (TIME, DATETIME2)
	testGetStringWithLocale	~160+	All JVM Locale.getAvailableLocales()
GlobalizationUTF16Test	testUTF16RoundTrip	30	18 pairwise + 12 extra per CharacterType
Total		~1,080+

Languages Covered (10)

English, German, Breton, Turkish, Russian, Arabic, Japanese, Chinese (China), Chinese (Taiwan), Chinese (Hong Kong)

Excluded Parameters (by design)

Excluded	Reason
Bashkir, Uighur languages	Extended Cyrillic/Arabic characters outside their collation's code page cause lossy ? substitution in VARCHAR — not a driver bug
DATE type in Calendar output param tests	Date.valueOf() creates millis in JVM timezone; GMT Calendar reinterpretation shifts the date when JVM is not UTC — timezone-sensitive, not a driver bug
Turkish in case sensitivity tests	Driver's findColumn uses Java standard case-folding which doesn't implement Turkish-I rules (known FX BUG 402731)
ASCII stream send methods (3 removed)	setAsciiStream/updateAsciiStream encode as US-ASCII (7-bit) — non-ASCII characters (BMP, SURROGATE, COMBINING) are inherently lossy, not valid for UTF-16 round-trip testing

Resource Cleanup

• Each test cleans up its own tables/procs in finally blocks
• GlobalizationCollationTest tracks created databases in a safety-net list with @AfterAll cleanup
• GlobalizationLocaleTest uses null-safe @AfterAll with connection.isClosed() check
• All finally blocks include catch clauses for best-effort cleanup

[Copilot]

Pull request overview

Ports legacy FX globalization functional scenarios into the JUnit test suite to validate Unicode/UTF-16 round-trips, locale/calendar behavior, and collation handling in the JDBC driver.

Changes:

• Added UTF-16 round-trip parameterized test coverage across multiple JDBC send/receive APIs.
• Added locale/query/case-sensitivity/calendar globalization tests and shared test-data providers.
• Added collation-focused tests including per-collation DB creation scenarios and server-collation discovery.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 14 comments.

File	Description
src/test/java/com/microsoft/sqlserver/jdbc/globalization/GlobalizationUTF16Test.java	New UTF-16 round-trip test exercising multiple setter/getter paths.
src/test/java/com/microsoft/sqlserver/jdbc/globalization/GlobalizationTestData.java	New shared globalization datasets + parameter sources for the new tests.
src/test/java/com/microsoft/sqlserver/jdbc/globalization/GlobalizationLocaleTest.java	New tests for Unicode identifiers, locale invariance, case sensitivity, and Calendar-based temporal access.
src/test/java/com/microsoft/sqlserver/jdbc/globalization/GlobalizationCollationTest.java	New collation coverage including DB-collation creation, _SC collation discovery, and Turkish CP1254 scenario.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.70%. Comparing base (0bdf85b) to head (13daf39).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2924      +/-   ##
============================================
- Coverage     60.71%   60.70%   -0.02%     
+ Complexity     4953     4932      -21     
============================================
  Files           151      151              
  Lines         35022    35022              
  Branches       5856     5856              
============================================
- Hits          21265    21261       -4     
+ Misses        10953    10949       -4     
- Partials       2804     2812       +8     

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