junit5 - How do I use Hamcrest with JUnit 5 when JUnit 5 doesn't have an assertThat() function? -


to use hamcrest junit 4 use assertthat() function. however, junit 5 no longer going have assertthat() function. how use hamcrest without assertthat()?

you have make sure hamcrest included in classpath , use assertthat() function provided hamcrest. current junit 5 user guide - writing tests assertions,

junit jupiter’s org.junit.jupiter.assertions class not provide assertthat() method 1 found in junit 4’s org.junit.assert class accepts hamcrest matcher. instead, developers encouraged use built-in support matchers provided third-party assertion libraries.

the following example demonstrates how use assertthat() support hamcrest in junit jupiter test. long hamcrest library has been added classpath, can statically import methods such assertthat(), is(), , equalto() , use them in tests in assertwithhamcrestmatcher() method below.

import static org.hamcrest.corematchers.equalto; import static org.hamcrest.corematchers.is; import static org.hamcrest.matcherassert.assertthat;  import org.junit.jupiter.api.test;  class hamcrestassertiondemo {      @test     void assertwithhamcrestmatcher() {         assertthat(2 + 1, is(equalto(3)));     }  }

naturally, legacy tests based on junit 4 programming model can continue using org.junit.assert#assertthat."


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