java - 启动eclipse平台进行junit测试时出现异常

Question

我有以下情况:

• A 类，在静态 block 中进行一些初始化。
• A 类 B 需要第一个类 A。

A 类不在我的控制之下，它来自一个库，我无法替换该库或 A 类。
当我想为 B 类编写单元测试并尝试模拟 A 类时，执行 A 类的静态 block ，我得到:

java.lang.ExceptionInInitializerError
    at sun.reflect.GeneratedSerializationConstructorAccessor1.newInstance(Unknown Source)
...
Caused by: org.eclipse.core.runtime.AssertionFailedException: assertion failed: The application has not been initialized.
    at org.eclipse.core.runtime.Assert.isTrue(Assert.java:110)
    at org.eclipse.core.internal.runtime.InternalPlatform.assertInitialized(InternalPlatform.java:139)
    at org.eclipse.core.internal.runtime.InternalPlatform.getAdapterManager(InternalPlatform.java:160)
    at org.eclipse.core.runtime.Platform.getAdapterManager(Platform.java:595)
    at test.A.<clinit>(A.java:12)
    ... 43 more

以下是 A 类、B 类和测试:

A.java

package test;

import org.eclipse.core.runtime.IAdapterManager;
import org.eclipse.core.runtime.Platform;

public class A {

    static {
        IAdapterManager adapterManager = Platform.getAdapterManager();
    }

    public A() {
    }

    public void doSomething() {
        //
    }
}

B.java

package test;

public class B {

    private A a;

    public B(A a) {
        this.a = a;
    }

    public B() {
    }

    public void someMethod() {
        a.doSomething();
    }

    public void setA(A a) {
        this.a = a;
    }
}

TestB.java

package test;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;

public class TestB {

    private B b;
    private A a;

    @Before
    public void setUp() throws Exception {
        a = Mockito.mock(A.class);
        b = new B(a);
    }

    @Test
    public void testSomeMethod() throws Exception {
        //
    }

    @After
    public void tearDown() throws Exception {
        //
    }
}

那么，问题是，我应该在单元测试中做什么来在“Mockito.mock(A.class);”之前初始化 eclipse 平台？

问题在于，当调用“Platform.getAdapterManager()”时，先调用“InternalPlatform.getDefault().getAdapterManager()”，然后再调用“assertInitialized()”，这会抛出“java.lang.ExceptionInInitializerError” “与

Caused by: org.eclipse.core.runtime.AssertionFailedException: assertion failed: The application has not been initialized.

Answer 1

你可以尝试PowerMock它支持删除静态初始值设定项。请参阅here举个例子。

总之，您可以使用 @RunWith(PowerMockRunner.class) 和 @SuppressStaticInitializationFor("org.mycompany.ClassWithStaticInitializer") 注释您的测试类。