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Archive for March, 2009

Hamcrest Regex Matcher

Posted by Piotr Gabryanczyk on March 27, 2009


I could not find a regex matcher in hamcrest, to do ie.
assertThat(selenium.getTitle(), matches("Template T\d{3}"));

It could be that I was not looking well enough or Nat Pryce decided not to include it on purpose. Of’course I saw PatternMatcher, but it lets you build regexes rather then match against them.


So here you have, enjoy!

public class RegexMatcher extends BaseMatcher{
    private final String regex;

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

    public boolean matches(Object o){
        return ((String)o).matches(regex);


    public void describeTo(Description description){
        description.appendText("matches regex=");
    public static RegexMatcher matches(String regex){
        return new RegexMatcher(regex);


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