Lukas Svoboda

Thanks you for pull request. Could you add test for this too?

Jasmine via gulp is perfect.

really great work. Unfortunatelly one test is falling (see bellow). The strength thing is that if I put writing diff image to file system before `expectPixelsToBeSkipped` then test pass. ```...

It's really strength. It randomly fails (in about 9 case of 10). I guess it might bug unrelated to your pull request. So one solution should be comment out the...

**EDIT: this comment contains two images which are mostly blank** For comparison of SmallImage.jpg I see almost all image blank expect the top left part.  In very rare cases...

Maybe I found half of the problem: it's old library pngjs2, when I switched to `pngjs: ~2.1.0` tests pass with `SmallImage.png`. Unfortunatelly it still fails with `People.png`. Tomorrow I will...

I guess it's necessary to change [this line](https://github.com/ClickHouse/dbt-clickhouse/blob/46904a404ce7fa835d8c73a222729dbaef5372ed/dbt/include/clickhouse/macros/materializations/snapshot.sql#L30) from: `create table if not exists {{ upsert }} as {{ target }}` to `create table if not exists {{ upsert }}...