我有一個用JUnit4語法編寫的測試類,它可以在eclipse中運行,並且運行「junit測試」選項而不失敗。當我通過Ant目標運行相同的測試,我得到這個錯誤:JUnit4測試類是否需要公共無參數構造函數?
java.lang.Exception: Test class should have public zero-argument constructor
at org.junit.internal.runners.MethodValidator.validateNoArgConstructor(MethodValidator.java:54)
at org.junit.internal.runners.MethodValidator.validateAllMethods(MethodValidator.java:39)
at org.junit.internal.runners.TestClassRunner.validate(TestClassRunner.java:33)
at org.junit.internal.runners.TestClassRunner.<init>(TestClassRunner.java:27)
at org.junit.internal.runners.TestClassRunner.<init>(TestClassRunner.java:20)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
at junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:24)
at junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:17)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:386)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:911)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:768)
Caused by: java.lang.NoSuchMethodException: dk.gensam.gaia.business.bonusregulering.TestBonusregulerAftale$Test1Reader.<init>()
at java.lang.Class.getConstructor0(Class.java:2706)
at java.lang.Class.getConstructor(Class.java:1657)
at org.junit.internal.runners.MethodValidator.validateNoArgConstructor(MethodValidator.java:52)
我沒有公開在類無參數的構造函數,但是這真的有必要嗎?
這是我的Ant目標
<target name="junit" description="Execute unit tests" depends="compile, jar-test">
<delete dir="tmp/rawtestoutput"/>
<delete dir="test-reports"/>
<mkdir dir="tmp/rawtestoutput"/>
<junit printsummary="true" failureproperty="junit.failure" fork="true">
<classpath refid="class.path.test"/>
<classpath refid="class.path.model"/>
<classpath refid="class.path.gui"/>
<classpath refid="class.path.jfreereport"/>
<classpath path="tmp/${test.jar}"></classpath>
<batchtest todir="tmp/rawtestoutput">
<fileset dir="${build}/test">
<include name="**/*Test.class" />
<include name="**/Test*.class" />
</fileset>
</batchtest>
</junit>
<junitreport todir="tmp">
<fileset dir="tmp/rawtestoutput"/>
<report todir="test-reports"/>
</junitreport>
<fail if="junit.
failure" message="Unit test(s) failed. See reports!"/>
</target>
測試類沒有構造函數,但它與默認的修飾符的內部類。它也有一個anonymouse內部類。兩個內部類都給出了「測試類應該有公共零參數構造函數錯誤」。我使用的Ant版本1.7.1和JUnit測試類4.7
嘗試排除**/* Helper.java。 – 2009-09-30 13:55:54