SNOW-1693588 Upgrade to JUnit5

[sfc-gh-astachowski]

Overview

SNOW-1693588 upgraded all tests to junit5. There are a lot of changes, but most are of following types:

• Changed imports to junit5 (@Test annotation, Assumptions, Assertions)
  • Note: junit5 assertions take error message as last argument instead of first, causing a lot of changes.
• Changed annotations to their 1:1 counterparts ( @Before to @BeforeEach, @BeforeClass to @BeforeAll etc.)
• Changed parametrisation from junit4 style (class level) to junit5 style (method level). This means in most cases, that any constructors with arguments have been removed and the arguments are instead passed directly to the tests.
  • As a con, this means some @BeforeClass annotations could not be translated to junit5, as the fields they depend on no longer exist. As a result, in those cases relevant functions are now called at the beginning of each test. (Could be remedied later I believe)
• Changed temporary folders from junit4 style to junit5 style (@Rule to @TempDir)
  • Moved several input/output streams to try-with-resources statements (while seemingly unrelated, leaving them open was causing some issues with @TempDir on windows)
• Changed conditional enable/disable annotations to junit5 style
  • Moved static functions from deleted Conditional ignore rules to new AssumptionUtils class
• Changed from junit4 @Category annotations to junit5 @Tag
• No longer asserting throws with annotations, using assertThrows instead.
• In many tests added logic to restore system properties after test execution (required now, because junit5 runs tests in different order than junit4, revealing errors like this).

Pre-review self checklist

• PR branch is updated with all the changes from master branch
• The code is correctly formatted (run mvn -P check-style validate)
• New public API is not unnecessary exposed (run mvn verify and inspect target/japicmp/japicmp.html)
• The pull request name is prefixed with SNOW-XXXX:
• Code is in compliance with internal logging requirements