From 6fafb9f3783af116a283a5fd950864a1cdcc1910 Mon Sep 17 00:00:00 2001
From: Kenny Root <kenny@the-b.org>
Date: Fri, 17 Jul 2015 07:54:28 -0700
Subject: Get code coverage for JUnit+Robolectric instead

---
 .travis.yml      |  2 +-
 app/build.gradle | 42 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index cb7a7aa..77d19fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,6 +36,6 @@ android:
   license:
     - '.+'
 
-script: ./gradlew build check createDebugCoverageReport
+script: ./gradlew build check jacocoTestDebugReport
 
 after_success: ./gradlew coveralls
diff --git a/app/build.gradle b/app/build.gradle
index 4fe9432..aade9af 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -66,7 +66,47 @@ android {
     }
 }
 
-coveralls.jacocoReportPath = 'build/reports/coverage/debug/report.xml'
+apply plugin: 'jacoco'
+
+// By default, Android Gradle plugin uses JaCoCo version 0.7.1, which works great in JUnit on the JVM.
+// But that will fail on Android Lollipop/ART runtime, which requires 0.7.3 or higher.
+if (rootProject.hasProperty('jacocoVersion')) {
+    android.jacoco.version = rootProject.property('jacocoVersion')
+    jacoco.toolVersion = rootProject.property('jacocoVersion')
+} else {
+    println "Using the default JaCoCo version of: ${jacoco.toolVersion}"
+}
+
+// The built-in jacoco plugin automatically applies itself to all Test tasks
+tasks.withType(Test).whenTaskAdded {
+    it.jacoco.append = false
+    it.jacoco.classDumpFile = file("${project.buildDir}/jacoco/dump")
+}
+
+// These tasks are for generating the coverage report after JUnit+robolectric tests have executed
+tasks.create(name: "jacocoTestDebugReport", type: JacocoReport, dependsOn: "testDebug") {
+    group = "Reporting"
+    description = "Generate Jacoco coverage reports"
+
+    classDirectories = fileTree(
+            dir: "${project.buildDir}/intermediates/classes/debug/",
+            excludes: ['**/R.class',
+                       '**/R$*.class',
+                       '**/*$ViewInjector*.*',
+                       '**/BuildConfig.*',
+                       '**/Manifest*.*']
+    )
+
+    sourceDirectories = files("src/main/java", "src/debug/java")
+    executionData = files("${project.buildDir}/jacoco/testDebug.exec")
+
+    reports {
+        xml.enabled = true
+        html.enabled = true
+    }
+}
+
+coveralls.jacocoReportPath = 'app/build/reports/jacoco/jacocoTestDebugReport/jacocoTestDebugReport.xml'
 
 dependencies {
     testCompile 'junit:junit:4.12'
-- 
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