JUnit Assert#assertSame equivalent in Hamcrest

Question

Is there an equivalent in hamcrest library for JUnit's Assert#assertSame? If yes, what is it? At the moment I can only think of Hamcrest#sameInstance but I am not quite sure this method is the right one to use.

score 7 · Accepted Answer · answered Jul 08 '16 at 11:56

The underlying matcher that provides this functionality is org.hamcrest.core.IsSame. It has convenience methods to hide it both in org.hamcrest.Matchers#sameInstance (as you mentioned) and in org.hamcrest.CoreMatchers#sameInstance.

Whichever you use is mainly a preference issue. Personally, I prefer statically importing from CoreMatchers, just because it's "slimmer":

import static org.hamcrest.CoreMatchers.sameInstance;
import static org.junit.Assert.assertThat;

import org.junit.Test;

public class SomeTest {
    @Test
    public void testSomething() {
        Object o1 = new Object();
        Object o2 = o1;

        assertThat(o1, sameInstance(o2));
    }
}

score 2 · Answer 2 · answered Jul 08 '16 at 11:50

2

You want to turn to

assertThat(actual, isSame(expected))

here.

answered Jul 08 '16 at 11:50

GhostCat

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Having static import `org.hamcrest.Matchers.*;` I see *can not resolve method isSame*. What shall I import then? – Arthur Eirich Jul 08 '16 at 11:53
1

You need the CoreMatchers. – GhostCat Jul 08 '16 at 11:57

JUnit Assert#assertSame equivalent in Hamcrest

2 Answers2