The best replacement for hamcrest is fest.

The best alternatives to hamcrest are rated as following:
★★★★★  fest
★★★  assertj
★  mockito

Your alternative for hamcrest is not listed? Suggest!
Speaking about hamcrest, one probably shouldn't forget about junit.

Other search terms related to hamcrest and their ratings are:
★★★★★ junit
You have in mind a companion for hamcrest and it is not yet here? Propose!



Google Trends

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hamcrest
fest
assertj