For me, these comments are doing more to hurt readability than anything else. If the info is important, it can go in identifiers:
```java
// Given:
final long transUnitId = 1L;
TransMemoryMerge actionWithThreshold = prepareActionAndMockSecurityService(80, transUnitId);
HTextFlow tfToTranslate = TestFixture.makeHTextFlow(transUnitId, hLocale, ContentState.New, "pot/a.po");
TransMemoryUnit tuResultMatchingSource = TestFixture.makeTransMemoryUnit(10L, hLocale);
TransMemoryResultItem mostSimilarTM = importedTmResult(11L, 100);
TransMemoryQuery tmQuery = new TransMemoryQuery(hTextFlow.getContents(), FUZZY_PLURAL);
```