CODEWITHSUNDEEP
javajunit
Nils-o-mat
Nils-o-mat

Reputation: 1256

Why does my Junit-AssertionError-Test fail?

I run the following test in my Eclipse (with arguments -ea):

public class ColorHelperTest
{
    @Rule
    public ExpectedException thrown = ExpectedException.none();

    @Test
    public void testGetColorByString()
    {
        thrown.expect(AssertionError.class);
        assert 1 == 2;
    }
}

The output is:

java.lang.AssertionError
at de.*.*.*.mytests.ColorHelperTest.testGetColorByString(ColorHelperTest.java:28)

28 is the line assert 1==2

Why does this test fail?

Upvotes: 0

Views: 533

Answers (3)

Forketyfork
Forketyfork

Reputation: 7810

You cannot "expect" AssertionError, this is the specific type of error that JUnit uses to signal that the test is failing.

Update: Turns out it's a bug of JUnit 4.11, and it was resolved in 4.12: https://github.com/junit-team/junit/blob/master/doc/ReleaseNotes4.12.md#pull-request-583-pull-request-720-fix-handling-of-assertionerror-and-assumptionviolatedexception-in-expectedexception-rule

Upvotes: 2

mauriciojost
mauriciojost

Reputation: 370

Interesting... What version of Junit you use? Using 4.12 (in my pom.xml looks like:

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>

the exact same test works for me.

Upvotes: 1

tddmonkey
tddmonkey

Reputation: 21184

The assert keyword is a JRE level flag and has nothing to do with JUnit. I think what you're really looking for is:

assertEquals(1, 2);

Upvotes: 1

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