AssertJ：NoSuchMethodException on softAssert

Question

我一直在试验assertJ作为当前声明库的替代品，hamcrest，这是我的团队项目中使用的。因此到目前为止，我有以下类：

Animal.java

package com.assertions.demo.assertj; 

public class Animal { 

private Species species; 

//no arg constructor 
public Animal(){} 

public Animal(Species species) { 
    this.species = species; 
} 

public Species getSpecies() { 
    return this.species; 
} 

public enum Species{ 
    DOG(4, true, Environment.LAND), 
    PIGEON(2, false, Environment.AIR), 
    OCTOPUS(8, false, Environment.SEA), 
    ALLIGATOR(4, true, Environment.AMPHIBIOUS); 

    private int numLegs; 
    private boolean hasTail; 
    private Environment environment; 

    private Species(int numLegs, boolean hasTail, Environment environment) { 
     this.numLegs = numLegs; 
     this.hasTail = hasTail; 
     this.environment = environment; 
    } 

    public int getNumLegs(){ 
     return this.numLegs; 
    } 

    public boolean hasTail() { 
     return this.hasTail; 
    } 
    public Environment getEnvironment() { 
     return this.environment; 
    } 
} 

public enum Environment { 
    LAND, SEA, AIR, AMPHIBIOUS 
} 

} 

而且我已经创建了下面的自定义断言它：

AnimalAssert.java

package com.assertions.demo.assertj; 

import org.assertj.core.api.AbstractAssert; 
import com.assertions.demo.assertj.Animal.Environment; 

public class AnimalAssert extends AbstractAssert<AnimalAssert, Animal> { 

public AnimalAssert(Animal actual, Class<AnimalAssert> selfType) { 
    super(actual, selfType); 
} 

public static AnimalAssert assertThat(Animal actual) { 
    return new AnimalAssert(actual, AnimalAssert.class); 
} 

public AnimalAssert hasTail(boolean hasTail) { 
    isNotNull(); 

    if(actual.getSpecies().hasTail() != hasTail) { 
     String expectedHasTail = hasTail ? "have a tail" : "not have a tail"; 
     String actualHasTail = actual.getSpecies().hasTail() ? "does" : "does not"; 
     failWithMessage("Expected animal to " + expectedHasTail + ", but animal " + actualHasTail + " have a tail"); 
    } 
    return this; 
} 

public AnimalAssert livesInEnvironment(Environment env) { 
    isNotNull(); 

    if(actual.getSpecies().getEnvironment() != env) { 
     failWithMessage("Expected animal environment to be <%s>, but was <%s>", env, actual.getSpecies().getEnvironment()); 
    } 
    return this; 
} 

public AnimalAssert hasNumberOfLegs(int numLegs) { 
    isNotNull(); 

    if(actual.getSpecies().getNumLegs() != numLegs) { 
     failWithMessage("Expected animal to have <%s> legs, but animal has <%s> legs", numLegs, actual.getSpecies().getNumLegs()); 
    } 

    return this; 
} 
} 

按照AssertJ的特性，我为上面提供了一个入口点，并且我试图添加sof牛逼断言功能：

CustomSoftAssertions.java

package com.demo.assertions.assertj; 

import org.assertj.core.api.SoftAssertions; 

public class CustomSoftAssertions extends SoftAssertions { 

public AnimalAssert assertThat(Animal actual) { 
    return proxy(AnimalAssert.class, Animal.class, actual); 
} 
} 

当我运行下面的测试：

AssertJDemo.java

package com.assertions.demo.assertj; 

import org.junit.Test; 
import static org.assertj.core.api.Assertions.assertThat; 
import com.assertions.demo.assertj.Animal.Environment; 
import com.assertions.demo.assertj.Animal.Species; 

public class AssertJDemo { 
    Animal[] testAnimalArray = new Animal[] { 
     new Animal(Species.ALLIGATOR), 
     new Animal(Species.DOG), 
     new Animal(Species.OCTOPUS), 
     new Animal(Species.PIGEON) 
    }; 

    @Test 
    public void softAssertWithCustomAssertionsTest() { 
     Animal dog = testAnimalArray[1]; 
     CustomSoftAssertions softAssert = new CustomSoftAssertions(); 

     softAssert.assertThat(dog).hasTail(false); 
     softAssert.assertThat(dog).livesInEnvironment(Environment.AIR); 
     softAssert.assertThat(dog).hasNumberOfLegs(8); 
    } 
} 

我碰到下面的堆栈跟踪：

org.assertj.core.internal.cglib.core.CodeGenerationException: java.lang.NoSuchMethodException-->com.assertions.demo.assertj.AnimalAssert$$EnhancerByCGLIB$$b5c6715f.<init>(com.assertions.demo.assertj.Animal) 
at org.assertj.core.internal.cglib.core.ReflectUtils.getConstructor(ReflectUtils.java:313) 
at org.assertj.core.internal.cglib.proxy.Enhancer$EnhancerFactoryData.<init>(Enhancer.java:420) 
at org.assertj.core.internal.cglib.proxy.Enhancer.wrapCachedClass(Enhancer.java:709) 
at org.assertj.core.internal.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:94) 
at org.assertj.core.internal.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91) 
at org.assertj.core.internal.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54) 
at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
at org.assertj.core.internal.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61) 
at org.assertj.core.internal.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) 
at org.assertj.core.internal.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116) 
at org.assertj.core.internal.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291) 
at org.assertj.core.internal.cglib.proxy.Enhancer.createHelper(Enhancer.java:480) 
at org.assertj.core.internal.cglib.proxy.Enhancer.create(Enhancer.java:324) 
at org.assertj.core.api.SoftProxies.create(SoftProxies.java:42) 
at org.assertj.core.api.AbstractSoftAssertions.proxy(AbstractSoftAssertions.java:31) 
at com.assertions.demo.assertj.CustomSoftAssertions.assertThat(CustomSoftAssertions.java:18) 
at com.assertions.demo.assertj.AssertJDemo.softAssertWithCustomAssertionsTest(AssertJDemo.java:202) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:497) 
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) 
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) 
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) 
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) 
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) 
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) 
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 
Caused by: java.lang.NoSuchMethodException: com.assertions.demo.assertj.AnimalAssert$$EnhancerByCGLIB$$b5c6715f.<init>(com.assertions.demo.assertj.Animal) 
at java.lang.Class.getConstructor0(Class.java:3082) 
at java.lang.Class.getDeclaredConstructor(Class.java:2178) 
at org.assertj.core.internal.cglib.core.ReflectUtils.getConstructor(ReflectUtils.java:309) 
... 39 more 

我是在做一些与assertJ库有关的错误，或者我违反了某些我没有发现的特定于java的东西？我使用Java 8 assertJ 3.8.0

编辑：我曾基于第一个答案（CGLIB需要一个），但同样会抛出异常

Answer 1

一个无参数的构造函数更新了动物类有你看了一眼assertj-例子，有定制软断言的工作示例：

https://github.com/joel-costigliola/assertj-examples/blob/master/assertions-examples/src/test/generated-assertions/org/assertj/SoftAssertions.java

https://github.com/joel-costigliola/assertj-examples/blob/master/assertions-examples/src/test/java/org/assertj/examples/GeneratedSoftAssertionsExamples.java