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javaregexjunit

Assert regex matches in JUnit

Ruby's Test::Unit has a nice assert_matches method that can be used in unit tests to assert that a regex matches a string.

Is there anything like this in JUnit? Currently, I do this:

assertEquals(true, actual.matches(expectedRegex));
Solution

  • If you use assertThat() with a Hamcrest matcher that tests for regex matches, then if the assertion fails you'll get a nice message that indicates expected pattern and actual text. The assertion will read more fluently also, e.g.

    assertThat("FooBarBaz", matchesPattern("^Foo"));

    with Hamcrest 2 you can find a matchesPattern method at MatchesPattern.matchesPattern.

    JUnit5:

    import static org.assertj.core.api.Assertions.assertThat;
assertThat(actual).matches(expected);