Enable assert in a maven built project

Question

I have a java program that is built using Maven and I need to enable the assert keyword. Ideally, I'd want to enable assertions in the maven build command.

[By default, Surefire enables JVM assertions for the execution of your test cases](http://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#enableAssertions) — Jens Piegsa, Nov 13 '13 at 23:41
The problem is I need the assertions in my main program, not in my test cases. — kabb, Nov 14 '13 at 00:02

score 11 · Accepted Answer · edited May 31 '18 at 11:46

11

Maven compiles and builds the java code. Assertion errors come when you are actually running java code so with maven you can't do it this way

unless you are using maven plugin to launch java code, you would have to supply -ea to jvm

exec:java

Pass -ea to commandline argument

Surefire

if you meant for test execution then configure sure-fire plugin to pass -ea to jvm

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.16</version>
    <configuration>
        <enableAssertions>true</enableAssertions>
    </configuration>
  </plugin>

edited May 31 '18 at 11:46

Quonux

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answered Nov 13 '13 at 23:39

jmj

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The surefire plugin enables assertions by default: http://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#enableAssertions so there is no need to do that explicitly. – Stephan Jan 13 '16 at 06:45

score 5 · Answer 2 · answered Oct 06 '16 at 13:48

5

The only things that worked for me was

export MAVEN_OPTS="-ea"

answered Oct 06 '16 at 13:48

johsin18

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When running java from mvn via exec:java this solution works to enable assertions. – Chris Mazzola Feb 11 '21 at 16:44

score 0 · Answer 3 · answered Feb 05 '17 at 10:20

You cannot build application with assertions enabled since they are enabled at runtime depending on whetevery or not you pass -ea argument to JVM. Here is configuration of maven exec plugin that enables assertions when running a program:

       <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.5.0</version>
            <executions>
                <execution>
                    <goals>
                        <goal>exec</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <executable>java</executable>
                <arguments>
                    <argument>-ea</argument>
                    <argument>-classpath</argument> <classpath />
                    <argument>io.mc.validationdemo.App</argument>
                </arguments>
            </configuration>
        </plugin>

Enable assert in a maven built project

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