nastra opened a new issue, #3615:
URL: https://github.com/apache/parquet-java/issues/3615
### Describe the enhancement requested
AssertJ gives us readable, fluent assertions that make tests easier to write
and failures easier to analyze. With JUnit's `assertEquals(expected, actual)`
it's easy to mix up argument order, and you end up with confusing failure
messages. AssertJ's `assertThat(actual).isEqualTo(expected)` reads naturally
and always gets the order right. Additionally, it provides a lot of flexibility
when asserting things.
Compound checks that need multiple JUnit assertions collapse into a single
chain:
```
// JUnit
assertNotNull(list);
assertEquals(3, list.size());
assertTrue(list.contains("foo"));
```
```
// AssertJ
assertThat(list).hasSize(3).contains("foo");
```
When something fails, AssertJ tells you exactly what went wrong and makes
debugging much easier, because the failure message usually contains enough
details to understand the issue. For example, an assertion on a list would fail
with `expected list to contain 'foo' but was ['bar', 'baz']`. JUnit assertions
on the other hand would only contain `expected true but was false`.
It also covers cases where JUnit assertions are just clunky: exception
messages, collection contents, map entries, string patterns, comparisons with
custom comparators. All without needing Hamcrest matchers or custom helper
methods.
I'm planning to add it as a project-wide test dependency so new tests can
use it immediately. Existing tests don't need to be migrated, and we can move
them over incrementally where it makes sense.
### Component(s)
_No response_
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