Ambiguous assertThat for Temporal instance implementing Comparable

[armandino]

Describe the bug

The upgrade to 3.26.0 results in a compilation error when invoking assertThat() with an argument of type java.time.Year.

• assertj core version: 3.26.0
• java version: 17

Test case reproducing the bug

@Test
void example() {
    Year year = Year.now();
    assertThat(year).isNotNull();
}

[scordio]

Thanks for reporting it, @armandino!

[scordio]

In case of Year instances, we have a clash between assertThat(Temporal) (added with 46630d7) and assertThat(Comparable).

[scordio]

Unfortunately, this happens whenever actual implements both Comparable and another interface (e.g., Temporal), and AssertJ offers separate assertThat methods for both Comparable and the interface instances. In such cases, the compiler cannot identify the proper assertThat candidate.

A way forward could be reverting the assertThat(Temporal) introduced with 46630d7 and introducing assertThatTemporal to satisfy @xenoterracide's request at #3404, similar to what we did in 17a5216.