java.lang.NoSuchMethodException on mock(Timestamp.class)

[marbon87]

When i try to mock Timestamp.class with easymock's mock(), i get the following error:

Caused by: java.lang.NoSuchMethodException: $java.sql.Timestamp$$EnhancerByCGLIB$$f28f2712.CGLIB$SET_THREAD_CALLBACKS([Lorg.easymock.cglib.proxy.Callback;)
	at java.base/java.lang.Class.getDeclaredMethod(Class.java:2475)
	at org.easymock.cglib.proxy.Enhancer.getCallbacksSetter(Enhancer.java:809)
	at org.easymock.cglib.proxy.Enhancer.access$000(Enhancer.java:63)
	at org.easymock.cglib.proxy.Enhancer$EnhancerFactoryData.<init>(Enhancer.java:414)
	... 55 more

This is the test-setup

@RunWith(PowerMockRunner.class)
public class FehlerTest {
    @Test
    public void example() {
        mock(Timestamp.class);
    }
}

4.0.0

<groupId>org.example</groupId>
<artifactId>powermock-easymock-failure</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
    <powermock.version>2.0.2</powermock.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>${powermock.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-easymock</artifactId>
        <version>${powermock.version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>

Running with adopt-openjdk-11.0.6

[henri-tremblay]

This looks like a dependency issue. It should work perfectly. I tried you dependencies and it worked. My guess is that you have more than that. For example, an old cglib version.

If I do a mvn dependency:tree, I see this:

[INFO] pro.tremblay:test:jar:1.0-SNAPSHOT
[INFO] +- org.powermock:powermock-module-junit4:jar:2.0.2:test
[INFO] |  +- org.powermock:powermock-module-junit4-common:jar:2.0.2:test
[INFO] |  |  +- org.powermock:powermock-reflect:jar:2.0.2:test
[INFO] |  |  |  +- net.bytebuddy:byte-buddy:jar:1.9.3:test
[INFO] |  |  |  \- net.bytebuddy:byte-buddy-agent:jar:1.9.3:test
[INFO] |  |  \- org.powermock:powermock-core:jar:2.0.2:test
[INFO] |  |     \- org.javassist:javassist:jar:3.24.0-GA:test
[INFO] |  +- junit:junit:jar:4.12:test
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] \- org.powermock:powermock-api-easymock:jar:2.0.2:test
[INFO]    +- org.powermock:powermock-api-support:jar:2.0.2:test
[INFO]    +- cglib:cglib-nodep:jar:3.2.9:test
[INFO]    \- org.easymock:easymock:jar:4.0.1:test
[INFO]       \- org.objenesis:objenesis:jar:3.0.1:test

What do you see?

[marbon87]

That's my dependecy tree from the example, same as yours:

[INFO] org.example:powermock-easymock-failure:jar:1.0-SNAPSHOT
[INFO] +- org.powermock:powermock-module-junit4:jar:2.0.2:test
[INFO] |  +- org.powermock:powermock-module-junit4-common:jar:2.0.2:test
[INFO] |  |  +- org.powermock:powermock-reflect:jar:2.0.2:test
[INFO] |  |  |  +- net.bytebuddy:byte-buddy:jar:1.9.3:test
[INFO] |  |  |  \- net.bytebuddy:byte-buddy-agent:jar:1.9.3:test
[INFO] |  |  \- org.powermock:powermock-core:jar:2.0.2:test
[INFO] |  |     \- org.javassist:javassist:jar:3.24.0-GA:test
[INFO] |  +- junit:junit:jar:4.12:test
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] \- org.powermock:powermock-api-easymock:jar:2.0.2:test
[INFO]    +- org.powermock:powermock-api-support:jar:2.0.2:test
[INFO]    +- cglib:cglib-nodep:jar:3.2.9:test
[INFO]    \- org.easymock:easymock:jar:4.0.1:test
[INFO]       \- org.objenesis:objenesis:jar:3.0.1:test

That's the complete pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>powermock-easymock-failure</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <powermock.version>2.0.2</powermock.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-module-junit4</artifactId>
            <version>${powermock.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-api-easymock</artifactId>
            <version>${powermock.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>
        </plugins>
    </build>
</project>

Maven 3.6.3, Java 11.0.6

[marbon87]

With that version of java it is running fine:

» java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_212-b03)

[henri-tremblay]

Ah. I missed that. Java 11. Indeed it fails. On the entire java.sql package. I'm suspecting some problem about where the mock is created. I will look into it.

[henri-tremblay]

First thing I can say, without powermock it works perfectly. It's a classloader issue. The mock is created in the powermock classloader. And the requested Callback is not from the same classloader as the one used to create the mock.

Not sure why yet...

[marbon87]

Hey @henri-tremblay , any update on this?

[henri-tremblay]

No sorry. And I'm not sure I will have the time soon. Any help is appreciated.