JsoupSiteParser.extractCondition(): add unit tests

[0pdd]

The puzzle 1326-2cfe45cd from #1326 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/feature/series/importing/extractor/JsoupSiteParser.java

Line 275 in 28eab06

// @todo #1326 JsoupSiteParser.extractCondition(): add unit tests

The puzzle was created by Slava Semushin on 21-May-20.