Robolectric + Eclipse无法找到资源？

Question

我刚刚为我的Android应用程序配置了测试项目以使用Robolectric.我跟着Eclipse Quick Start.执行我简单的第一次测试时会出现异常.

java.lang.RuntimeException: java.lang.NullPointerException
    at com.xtremelabs.robolectric.res.ResourceLoader.init(ResourceLoader.java:93)
    at com.xtremelabs.robolectric.res.ResourceLoader.getStringValue(ResourceLoader.java:271)
    at com.xtremelabs.robolectric.shadows.ShadowResources.getString(ShadowResources.java:56)
    at android.content.res.Resources.getString(Resources.java)
    at org.xxx.mobile.android.teldir.app.TelephoneDirectoryTest.searchButtonLabelShouldBeGo(TelephoneDirectoryTest.java:22)
    [...]
Caused by: java.lang.NullPointerException
    at com.xtremelabs.robolectric.res.StringResourceLoader.getValue(StringResourceLoader.java:17)
    at com.xtremelabs.robolectric.res.StringArrayResourceLoader.processNode(StringArrayResourceLoader.java:39)
    at com.xtremelabs.robolectric.res.XpathResourceXmlLoader.processResourceXml(XpathResourceXmlLoader.java:27)
    at com.xtremelabs.robolectric.res.DocumentLoader.loadResourceXmlFile(DocumentLoader.java:58)
    at com.xtremelabs.robolectric.res.DocumentLoader.loadResourceXmlDir(DocumentLoader.java:52)
    at com.xtremelabs.robolectric.res.DocumentLoader.loadResourceXmlDir(DocumentLoader.java:39)
    at com.xtremelabs.robolectric.res.ResourceLoader.loadValueResourcesFromDir(ResourceLoader.java:142)
    at com.xtremelabs.robolectric.res.ResourceLoader.loadValueResourcesFromDirs(ResourceLoader.java:136)
    at com.xtremelabs.robolectric.res.ResourceLoader.loadValueResources(ResourceLoader.java:109)
    at com.xtremelabs.robolectric.res.ResourceLoader.init(ResourceLoader.java:85)
    at com.xtremelabs.robolectric.res.ResourceLoader.getStringValue(ResourceLoader.java:271)
    at com.xtremelabs.robolectric.shadows.ShadowResources.getString(ShadowResources.java:56)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.xtremelabs.robolectric.bytecode.ShadowWrangler.methodInvoked(ShadowWrangler.java:87)
    at com.xtremelabs.robolectric.bytecode.RobolectricInternals.methodInvoked(RobolectricInternals.java:110)
    at android.content.res.Resources.getString(Resources.java)
    [...]

测试如下.

import static org.junit.Assert.assertEquals;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import com.xtremelabs.robolectric.RobolectricTestRunner;

@RunWith(RobolectricTestRunner.class)
public class TelephoneDirectoryTest {
    private TelephoneDirectory activity;

    @Before
    public void setUp() {
        activity = new TelephoneDirectory();
    }

    @Test
    public void searchButtonLabelShouldBeGo() throws Exception {
        String goLabel = activity.getResources().getString(R.string.search);
        assertEquals("Go", goLabel);

    }
}

好像找不到Android ./res文件夹了.${workspace_loc:teldir-android}正如指南所说,我指出了JUnit配置.这使Eclipse能够找到AndroidManifest.xml,避免其他错误,imho.

为了避免这种异常我还添加了./res文件夹作为我的Android应用程序的源文件夹,清理并重新启动了所有,但同样的异常引发了.

我究竟做错了什么？

Answer 1

我必须在我的测试运行配置中添加一个环境变量:

ANDROID_HOME=C:/path/to/android-sdks