migrate-groovy-to-java

List the Groovy files in the Gradle module, translate each to a JDK 8-compatible JUnit 5 test, then run the suite to confirm all tests pass and the test count is unchanged before deleting the Groovy files. Spock `where:` blocks map to `@TableTest` or `@MethodSource` parameterized tests.

Prefer `@TableTest` with a String array where the first row is the header and a `scenario` column provides display names. When most cases are tabular but some need programmatic setup, combine `@TableTest` with `@MethodSource` on the same `@ParameterizedTest`; use `@MethodSource` alone only when tabular form is impractical.

Use the Mockito bundle (`libs.bundles.mockito`) instead of manual stub implementations. Port `1 * mock.method(value)` to `verify(mock).method(value)` and `N *` to `verify(mock, times(N))`, never relaxing to `atLeastOnce()` with `any()` matchers, since that silently weakens the original assertion.

Yes, all generated Java must be JDK 8 compatible. That means no text blocks, so `@TableTest` uses String array annotation syntax, and checked exceptions are declared with `throws` rather than wrapped in runtime exceptions.

Frequent errors include weakening pinned assertions into `any()` matchers, mocking Maps instead of using a real HashMap with size assertions, keeping `LinkedHashMap` where order is irrelevant, and using `int` instead of `byte` for sampling priority constants. The QUALITY_RULES.md catalog flags these as BLOCKER or WARNING rules.

Avoid `@TableTest` when the majority of rows require complex objects or custom converters that do not fit a tabular string representation. In that case use `@MethodSource` only, with a `<testMethodName>Arguments` method returning `Stream<Arguments>`.