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114 lines
4.6 KiB
114 lines
4.6 KiB
4 months ago
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<title>TestNG - Migrating from JUnit</title>
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<link rel="stylesheet" href="testng.css" type="text/css" />
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</head>
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<body onLoad="prettyPrint()">
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<script type="text/javascript">
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displayMenu("migrating.html")
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</script>
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<h2 align="center">Migrating from JUnit</h2>
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<h3>Using Eclipse</h3>
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The easiest way to convert your JUnit tests to TestNG is to use the Eclipse TestNG plug-in refactoring support. You will find a full description of its features in the <a href="eclipse.html#eclipse-quickfix">Eclipse section</a>.
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<h3>Asserts</h3>
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Note that the class <tt>org.testng.Assert</tt> uses a different argument ordering than the ones used by JUnit. If you are porting code that uses JUnit's asserts, you might want to us a static import of that class:
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<pre class="brush: java">
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import static org.testng.AssertJUnit.*;
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</pre>
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<h3>Running JUnit Tests</h3>
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<p>TestNG can automatically recognize and run JUnit tests, so you can use TestNG as a runner for all your existing tests and write new tests using TestNG.</p>
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<p>All you have to do is to put JUnit library on the TestNG classpath, so it can find and use JUnit classes,
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change your test runner from JUnit to TestNG in Ant and then run TestNG in <tt>"mixed"</tt> mode.
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This way you can have all your tests in the same project, even in the same package, and start using TestNG.
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This approach also allows you to convert your existing JUnit tests to TestNG incrementally.</p>
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<h4>Example - replacing JUnit Ant task with TestNG one</h4>
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JUnit version:
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<pre class="brush: xml">
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<junit dir="${work.dir}" errorproperty="tests.failed" failureproperty="tests.failed" fork="true">
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<batchtest todir="${build.test.results.dir}">
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<fileset dir="${test.src.dir}">
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<include name="**/*Test.*"/>
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</batchtest>
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<classpath>
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<path path="${run.test.classpath}"/>
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</classpath>
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<syspropertyset>
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<propertyref prefix="test-sys-prop."/>
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<mapper from="test-sys-prop.*" to="*" type="glob"/>
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</syspropertyset>
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<formatter type="xml"/>
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<jvmarg value="-ea"/>
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<jvmarg line="${run.jvmargs}"/>
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</junit>
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</pre>
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TestNG version:
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<pre class="brush: xml">
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<taskdef name="testng" classname="org.testng.TestNGAntTask" classpath="${run.test.classpath}"/>
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<fileset id="mixed.tests" dir="${test.src.dir}">
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<include name="**/*Test.*"/>
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</fileset>
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<testng mode="mixed" classfilesetref="mixed.tests" workingDir="${work.dir}" failureProperty="tests.failed" outputdir="${build.test.results.dir}">
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<classpath>
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<pathelement path="${build.test.classes.dir}"/>
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<pathelement path="${run.test.classpath}"/>
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<pathelement path="${junit.lib}"/>
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</classpath>
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<propertyset>
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<propertyref prefix="test-sys-prop."/>
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<mapper from="test-sys-prop.*" to="*" type="glob"/>
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</propertyset>
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<jvmarg line="${run.jvmargs}"/>
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</testng>
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</pre>
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<h3>Related reading</h3>
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<ul>
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<li><a href="http://www.opengamma.com/blog/2011/04/04/converting-opengamma-junit-testng">Here is the detailed report of a company that successfully converted a large codebase of JUnit 4 tests over to TestNG</a>.</li>
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<li><a href="http://wiki.netbeans.org/TestNG_MixedMode">Mixed mode in TestNG</a>.</li>
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</ul>
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