如何在着色工件上运行maven集成测试？

我有一个简单的目标：我希望能够使用maven-failsafe-plugin，或者任何可行的替代方法，对我用maven-shade-plugin构建的jar运行测试。具体来说，我希望在shade运行后运行测试，因为我希望有一个集成测试来验证shade的重新定位没有破坏我试图重新定位的东西，因为它经常会破坏。
当我试图重新定位Jackson时，确保Jackson仍然能够在某些POJO上找到注解/等，以便它们正确地序列化（反序列化）是很重要的。显然，这在重新定位前是有效的。我们遇到了阴影jar没有正确地序列化（反序列化）的问题，所以对我们来说，在部署前进行某种测试来验证这种行为是很重要的。
我遇到的问题似乎是maven-failsafe-plugin在运行shaded jar的时候测试了原始源代码。这意味着，它无法加载我重新定位的一个类，尽管maven-shade-plugin中的重新定位过程应该已经（并且在live工件中确实）重新定位了对那个类的引用。
我的期望：maven-failsafe-plugin应该完全脱离阴影部分的源代码运行。如果没有，其他的东西应该允许我在build/CI时使用阴影部分/重新定位的代码运行一个类似的测试。例如，就像我从命令行运行它一样。顺便说一句，下面是我这样做得到的输出：

>java -jar shade-integration-tests-1.0-SNAPSHOT.jar
{key=123}
test.shaded.com.fasterxml.jackson.databind.ObjectMapper

我从测试中得到异常。注意，这不是Assert失败，而是类加载失败（没有发生其他异常）：

Running test.shade.integration.tests.JsonIT
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.057 s <<< FAILURE! - in test.shade.integration.tests.JsonIT
test.shade.integration.tests.JsonIT.testClassName  Time elapsed: 0.032 s  <<< ERROR!
java.lang.NoSuchFieldError: MAPPER
    at test.shade.integration.tests.JsonIT.testClassName(JsonIT.java:9)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:727)
    at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
    at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:147)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:86)
    at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)
    at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.lambda$invoke$0(InterceptingExecutableInvoker.java:93)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
    at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:92)
    at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:86)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:217)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
...

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>test</groupId>
    <artifactId>shade-integration-tests</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>14</source>
                    <target>14</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.4.0</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <manifestEntries>
                                        <Main-Class>test.shade.integration.tests.MainClass</Main-Class>
                                    </manifestEntries>
                                </transformer>
                            </transformers>
                            <relocations>
                                <relocation>
                                    <pattern>com.fasterxml.jackson</pattern>
                                    <shadedPattern>test.shaded.com.fasterxml.jackson</shadedPattern>
                                </relocation>
                            </relocations>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.0.0-M7</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-failsafe-plugin</artifactId>
                <version>3.0.0-M7</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>integration-test</goal>
                            <goal>verify</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.fasterxml.jackson</groupId>
                <artifactId>jackson-bom</artifactId>
                <version>2.12.6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.junit</groupId>
                <artifactId>junit-bom</artifactId>
                <version>5.9.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

MainClass.java (can大概忽略了这一点）：

package test.shade.integration.tests;

import java.util.Map;

public class MainClass {
    public static void main(String[] args) throws Exception {
        Map<String, Object> result = Json.MAPPER.readValue("{\"key\":123}", Map.class);
        System.out.println(result);
        System.out.println(Json.MAPPER.getClass().getCanonicalName());
    }
}

Json.java

package test.shade.integration.tests;

import com.fasterxml.jackson.databind.ObjectMapper;

public class Json {
    public static final ObjectMapper MAPPER = new ObjectMapper(); // This is part of the problem

    private Json() {
    }
}

JsonTest.java （maven-surefire插件，运行良好的junit测试）：

package test.shade.integration.tests;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class JsonTest {
    @Test
    void testClassName() {
        String result = Json.MAPPER.getClass().getCanonicalName();

        assertEquals("com.fasterxml.jackson.databind.ObjectMapper", result);
    }
}

JsonIT.java （maven-failsafe-plugin，失败的IT）：

package test.shade.integration.tests;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class JsonIT {
    @Test
    void testClassName() {
        String result = Json.MAPPER.getClass().getCanonicalName();

        assertEquals("test.shaded.com.fasterxml.jackson.databind.ObjectMapper", result);
    }
}

如何在着色工件上运行maven集成测试？

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