A modern programming language that makes developers happier.

kotlinlang

I have a large number of data converter tests to write (model transformations). What is a good way to structure the tests for compactness and maintenance? Now I am using data classes with I can call `copy()` on to create different input to the test cases. Anything else? Examples appreciated!

Please include an example, so we have a better idea of what you're trying to do. :) 

```

data class LegacyEpisodeAttributes(
    val seasonNumber: Int,
    val episodeBroadcastNumber: Int,
    val numberOfEpisodesInSeason: Int,
    val shortEpisodeSynopsis: String?,
    val longEpisodeSynopsis: String?,
    val images: LegacyImages?
)

data class TvSeries(
    val id: String,
    val name: String,
    val shortDescription: String?,
    val longDescription: String?,
    val image: Image,
    val seasons: List&lt;Season&gt;
)

data class Season(
    val id: String,
    val name: String,
    val number: Int,
    val episodes: List&lt;Episode&gt;,
    val numberOfProducedEpisodes: Int
)

data class Episode(
    val id: String,
    val name: String?,
    val longDescription: String?,
    val shortDescription: String?,
    val tags: List&lt;Tag&gt;,
    val image: Image?,
    val number: Int?,
    val live: Live?
)
```

lets say I have a bunch of instances `LegacyEpisodeAttributes` which I want to convert to `TvSeries` `Season` and `Episode` classes. There are many variations of indata which I need to test, to assert that the converter code works.