android - 如何找到用于手动测试的android应用程序的代码覆盖率？

Question

我想找到一个Android应用程序(Android studio + gradle)的手动测试和自动测试(appium)的代码覆盖率。

StackOverflow 上已经有一些与此问题相关的问题，但没有一个对我有用。我已经按照这个问题的步骤进行了:Android Coverage launch with JaCoCo在 sdcard/中生成的 jacoco.exec 文件是 37 字节，基本上是空的。

build.gradle当前配置:

apply plugin: 'com.android.application'

apply plugin: 'jacoco'
def coverageSourceDirs = [
        '../app/src/main/java'
]

jacoco{
    toolVersion = "0.7.4.201502262128"
}

task jacocoTestReport(type: JacocoReport) {
    group = "Reporting"
    description = "Generate Jacoco coverage reports after running tests."
    reports {
        xml.enabled = true
        html.enabled = true
    }
    classDirectories = fileTree(
            dir: './build/intermediates/classes/debug',
            excludes: ['**/R*.class',
                       '**/*$InjectAdapter.class',
                       '**/*$ModuleAdapter.class',
                       '**/*$ViewInjector*.class'
            ])
    sourceDirectories = files(coverageSourceDirs)
    executionData = files("$buildDir/outputs/code-coverage/connected/coverage.exec")
    doFirst {
        new File("$buildDir/intermediates/classes/").eachFileRecurse { file ->
            if (file.name.contains('$$')) {
                file.renameTo(file.path.replace('$$', '$'))
            }
        }
    }
}
// this is for the report
...

jacoco.java:

package anubhav.calculatorapp;

import android.util.Log;

import java.lang.reflect.Method;

public class jacoco {
    static void generateCoverageReport() {
        String TAG = "jacoco";
        // use reflection to call emma dump coverage method, to avoid
        // always statically compiling against emma jar
        String coverageFilePath = "/sdcard/coverage.exec";
        java.io.File coverageFile = new java.io.File(coverageFilePath);
        try {
            Class<?> emmaRTClass = Class.forName("com.vladium.emma.rt.RT");
            Method dumpCoverageMethod = emmaRTClass.getMethod("dumpCoverageData",
                    coverageFile.getClass(), boolean.class, boolean.class);

            dumpCoverageMethod.invoke(null, coverageFile, false, false);
            Log.e(TAG, "generateCoverageReport: ok");
        } catch (Exception  e) {
            Log.e("jacoco", "inside catch. no emma jar found");
            new Throwable("Is emma jar on classpath?", e);
        }
    }
}

Answer 1

在 build.gradle 文件中进行这些更改:

apply plugin: 'jacoco' 

同时补充testCoverageEnabled true到 buildTypes 中的调试 {}。我无法强调 testCoverageEnabled 的重要性，它检测文件，没有它您将无法获得覆盖。确保正确添加此行。

要正确设置“build.gradle”，请检查“build/intermediates”。

为AndroidManifest.xml添加读写外部存储权限

在 MainActivity.java 的 onDestroy() 函数中添加以下行:

Log.d("StorageSt", Environment.getExternalStorageState());
        String coverageFilePath = Environment.getExternalStorageDirectory() + File.separator+ "coverage.exec";
        File coverageFile = new File(coverageFilePath);
        super.onStop();
        if(BuildConfig.DEBUG)
        {
            try {
                Class<?> emmaRTClass = Class.forName("com.vladium.emma.rt.RT");
                Method dumpCoverageMethod = emmaRTClass.getMethod("dumpCoverageData",coverageFile.getClass(),boolean.class,boolean.class);
                dumpCoverageMethod.invoke(null, coverageFile,true,false);
            }
            catch (Exception e) {}

运行您的应用程序，您会在/sdcard/中找到 coverage.exec。如果模拟器上的覆盖范围是 37bytes，请在真实设备上尝试或构建 APK 并将其放入模拟器中进行安装。

然后您可以将 coverage.exec 拉入您的计算机并使用 jacoco 从中生成 HTML 报告。