Assert regex matches in JUnit

Question

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 anythi

Answer 1

You can use Hamcrest, but you have to write your own matcher:

public class RegexMatcher extends TypeSafeMatcher {

    private final String regex;

    public RegexMatcher(final String regex) {
        this.regex = regex;
    }

    @Override
    public void describeTo(final Description description) {
        description.appendText("matches regex=`" + regex + "`");
    }

    @Override
    public boolean matchesSafely(final String string) {
        return string.matches(regex);
    }


    public static RegexMatcher matchesRegex(final String regex) {
        return new RegexMatcher(regex);
    }
}

usage

import org.junit.Assert;


Assert.assertThat("test", RegexMatcher.matchesRegex(".*est");