模拟静态方法+运行参数化测试=“找不到匹配”

Question

我有一个这样的单元测试类：

import junitparams.JUnitParamsRunner;

@RunWith(JUnitParamsRunner.class)
public class CustomerTest
{

    @Test
    @Parameters({
    "true",
    "false",
    })
    public void testMaritalStatus(boolean married) {


    }

}

现在，我需要模拟一些静态方法，所以我这样做：

import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.modules.junit4.PowerMockRunner;
import org.powermock.modules.junit4.PowerMockRunnerDelegate;

@Before
public void setup() {
     PowerMockito.mockStatic(Helpers.class)
}

但为了使用它，我也需要这样做：

@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(JUnitParamsRunner.class)
public class CustomerTest {


}

问题：我收到此错误：

No match found

java.lang.IllegalStateException: No match found
at java.util.regex.Matcher.group(Matcher.java:536)
at java.util.regex.Matcher.group(Matcher.java:496)
at org.powermock.modules.junit4.internal.impl.NotificationBuilder.determineTestMethod(NotificationBuilder.java:141)
at org.powermock.modules.junit4.internal.impl.NotificationBuilder.access$000(NotificationBuilder.java:37)
at org.powermock.modules.junit4.internal.impl.NotificationBuilder$OngoingTestRun.<init>(NotificationBuilder.java:85)
at org.powermock.modules.junit4.internal.impl.NotificationBuilder.testStartHasBeenFired(NotificationBuilder.java:231)
at org.powermock.modules.junit4.internal.impl.PowerMockRunNotifier.fireTestStarted(PowerMockRunNotifier.java:109)
at junitparams.internal.ParameterisedTestMethodRunner.runTestMethod(ParameterisedTestMethodRunner.java:41)
at junitparams.internal.ParameterisedTestClassRunner.runParameterisedTest(ParameterisedTestClassRunner.java:143)
at junitparams.JUnitParamsRunner.runChild(JUnitParamsRunner.java:388)
at junitparams.JUnitParamsRunner.runChild(JUnitParamsRunner.java:366)
at org.powermock.modules.junit4.internal.impl.DelegatingPowerMockRunner$2.call(DelegatingPowerMockRunner.java:143)
at org.powermock.modules.junit4.internal.impl.DelegatingPowerMockRunner$2.call(DelegatingPowerMockRunner.java:136)
at org.powermock.modules.junit4.internal.impl.DelegatingPowerMockRunner.withContextClassLoader(DelegatingPowerMockRunner.java:127)
at org.powermock.modules.junit4.internal.impl.DelegatingPowerMockRunner.run(DelegatingPowerMockRunner.java:136)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)

Answer 1

这是由于 PowerMock 中的 bug。显然，JUnitParams 传递给 PowerMock 的方法的 DisplayName 不符合其相当狭窄的要求。给出了以下解决方法：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.19.1</version>
    <configuration>
        <systemPropertyVariables>
            <JUnitParams.flat>true</JUnitParams.flat>
        </systemPropertyVariables>
    </configuration>
</plugin>

这给了我们：

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>pl.pragmatists</groupId>
        <artifactId>JUnitParams</artifactId>
        <version>1.0.4</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>1.7.4</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito</artifactId>
        <version>1.7.4</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<!-- workaround -->
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.19.1</version>
            <configuration>
                <systemPropertyVariables>
                    <JUnitParams.flat>true</JUnitParams.flat>
                </systemPropertyVariables>
            </configuration>
        </plugin>
    </plugins>
</build>

在我的pom.xml 中有这个，在将@PrepareForTest(Helpers.class) 添加到CustomerTest 之后，测试运行良好：

import junitparams.JUnitParamsRunner;
import junitparams.Parameters;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.powermock.modules.junit4.PowerMockRunnerDelegate;

@RunWith(PowerMockRunner.class)
@PowerMockRunnerDelegate(JUnitParamsRunner.class)
@PrepareForTest(Helpers.class)
public class CustomerTest {

    @Before
    public void setup() {
        PowerMockito.mockStatic(Helpers.class);
    }

    @Test
    @Parameters({
            "true",
            "false",
    })
    public void testMaritalStatus(boolean married) {

    }
}