| Use `assertEquals(expected, actual, delta)` to compare floating-point numbers. | |
| This call to `assertEquals()` will either fail or not compile in JUnit 4. Use | |
| `assertEquals(expected, actual, 0.0)` if the delta must be `0.0`. | |
| Alternatively, one can use Google Truth library's `DoubleSubject` class which | |
| has both `isEqualTo()` for delta `0.0` and `isWithin()` for non-zero deltas. |