Mixing Hamcrest and TestNG

Question

Has anyone integrated Hamcrest with TestNG so that its matchers can easily be used in TestNG assertions?

Answer 1

In short, to answer your question: You don't need to integrate TestNG with Hamcrest. Just call org.hamcrest.MatcherAssert.assertThat(...) directly which throws java.lang.AssertionError.

Background

I found your question via Google, wondering exactly the same issue. After further Googling, I didn't find any satisfying answers, so I read the source code for JUnit's integration with Hamcrest.

With JUnit, Hamcrest integration is normally used by calling:

org.junit.Assert.assertThat(
    T actual,
    org.hamcrest.Matcher<? super T> matcher)

When I read the source code, I discovered it just a small wrapper to call:

org.hamcrest.MatcherAssert.assertThat(
    String reason,
    T actual,
    org.hamcest.Matcher<? super T> matcher)

This function throws java.lang.AssertionError.

Answer 2

What worked for me: 1. http://search.maven.org/

2. Search for 'java-hamcrest' the latest as for now is '2.0.0.0'

3. find dependency for Gradle (in my case)

4. Added compile 'org.hamcrest:java-hamcrest:2.0.0.0' to build.gradle in my project.

Answer 3

If you are facing problem with empty method then I would suggest to add hamcrest first in dependency list. or import first hamcrest, it will solve the problem.

I was using TestNJ with rexsl(internally using Hamcrest) and it fails to find empty method. then I added rexsl first in dependency list, if you are adding library in class path you can try to add first the Hamcrest one.

hope it will help someone like me.