Espresso crash tests

app/build.gradle

@@ -10,16 +10,29 @@ buildscript {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
     dataBinding.enabled = true
 
     defaultConfig {
         applicationId "com.sample.browserstack.samplecalculator"
         minSdkVersion 15
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
+        // tell Gradle where our native CMake file lives
+        externalNativeBuild {
+            cmake {
+                // you can also restrict to specific ABIs here
+                abiFilters "arm64-v8a", "armeabi-v7a"
+            }
+        }
+    }
+    externalNativeBuild {
+        cmake {
+            path "src/main/cpp/CMakeLists.txt"
+            version "3.10.2"  // or match your installed CMake version
+        }
     }
     buildTypes {
         release {
@@ -38,10 +51,10 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'androidx.appcompat:appcompat:1.0.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
-    androidTestImplementation 'androidx.test:rules:1.1.1'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
-    testImplementation 'junit:junit:4.12'
-}
+    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test:rules:1.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    testImplementation 'junit:junit:4.13'
+}

app/src/androidTest/java/com/sample/browserstack/samplecalculator/CrashJavaButtonTest.java

@@ -0,0 +1,27 @@
+package com.sample.browserstack.samplecalculator;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@RunWith(AndroidJUnit4.class)
+public class CrashJavaButtonTest {
+
+    @Rule
+    public ActivityTestRule<MainActivity> activityRule =
+            new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void crashJavaAppUnderTest() {
+        // this will throw the RuntimeException in Java,
+        // test harness will catch it and the process will record the stack-trace
+        onView(withId(R.id.buttonCrashJava)).perform(click());
+    }
+}

app/src/androidTest/java/com/sample/browserstack/samplecalculator/CrashViaButtonTest.java

@@ -0,0 +1,28 @@
+package com.sample.browserstack.samplecalculator;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@RunWith(AndroidJUnit4.class)
+public class CrashViaButtonTest {
+
+    @Rule
+    public ActivityTestRule<MainActivity> activityRule =
+            new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void crashAppUnderTest() {
+        // Will invoke nativeCrash() and produce a real SIGSEGV
+        onView(withId(R.id.buttonCrash)).perform(click());
+
+        // (no further assertions—test will fail when the process dies)
+    }
+}

app/src/androidTest/java/com/sample/browserstack/samplecalculator/EnsureJavaCrash.java

@@ -0,0 +1,27 @@
+package com.sample.browserstack.samplecalculator;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@RunWith(AndroidJUnit4.class)
+public class EnsureJavaCrash {
+
+    @Rule
+    public ActivityTestRule<MainActivity> activityRule =
+            new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void crashJavaAppUnderTest() {
+        // this will throw the RuntimeException in Java,
+        // test harness will catch it and the process will record the stack-trace
+        onView(withId(R.id.buttonCrashJava)).perform(click());
+    }
+}

app/src/androidTest/java/com/sample/browserstack/samplecalculator/EnsureSysCrash.java

@@ -0,0 +1,28 @@
+package com.sample.browserstack.samplecalculator;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@RunWith(AndroidJUnit4.class)
+public class EnsureSysCrash {
+
+    @Rule
+    public ActivityTestRule<MainActivity> activityRule =
+            new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void crashAppUnderTest() {
+        // Will invoke nativeCrash() and produce a real SIGSEGV
+        onView(withId(R.id.buttonCrash)).perform(click());
+
+        // (no further assertions—test will fail when the process dies)
+    }
+}

app/src/androidTest/java/com/sample/browserstack/samplecalculator/SysCrash.java

@@ -0,0 +1,28 @@
+package com.sample.browserstack.samplecalculator;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@RunWith(AndroidJUnit4.class)
+public class SysCrash {
+
+    @Rule
+    public ActivityTestRule<MainActivity> activityRule =
+            new ActivityTestRule<>(MainActivity.class);
+
+    @Test
+    public void crashAppUnderTest() {
+        // Will invoke nativeCrash() and produce a real SIGSEGV
+        onView(withId(R.id.buttonCrash)).perform(click());
+
+        // (no further assertions—test will fail when the process dies)
+    }
+}

app/src/main/AndroidManifest.xml

@@ -9,8 +9,10 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
+        android:requestLegacyExternalStorage="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+                  android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.10.2)
+project("crashlib")
+
+# Build a shared library called "crashlib"
+add_library(crashlib SHARED crashlib.cpp)
+
+# Link against Android's log library if you ever want to log
+find_library(log-lib log)
+target_link_libraries(crashlib ${log-lib})

app/src/main/cpp/crashlib.cpp

@@ -0,0 +1,10 @@
+#include <jni.h>
+
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_sample_browserstack_samplecalculator_MainActivity_nativeCrash(
+        JNIEnv* /* env */, jobject /* thiz */) {
+// Force a write to address zero → produces SIGSEGV
+volatile int* bad = nullptr;
+*bad = 0;
+}

app/src/main/java/com/sample/browserstack/samplecalculator/MainActivity.java

@@ -11,6 +11,13 @@
 
 public class MainActivity extends AppCompatActivity {
 
+    static {
+        // Load our native library at startup
+        System.loadLibrary("crashlib");
+    }
+    // Native method declaration
+    private native void nativeCrash();
+
     private double firstNum = Double.NaN;
     private double secondNum;
     private boolean equalClicked = false;
@@ -24,6 +31,25 @@ protected void onCreate(Bundle savedInstanceState) {
 
 
         binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
+
+        // Show the crash button and hook it into nativeCrash()
+        binding.buttonCrash.setVisibility(View.VISIBLE);
+        binding.buttonCrash.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                nativeCrash();  // <— this will SIGSEGV in native code
+            }
+        });
+
+        // 2) Java crash button
+        binding.buttonCrashJava.setVisibility(View.VISIBLE);
+        binding.buttonCrashJava.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                throw new RuntimeException("💥 Deliberate Java crash from test button");
+            }
+        });
+
         binding.editText.setText("");
 
         binding.buttonClear.setOnClickListener(new View.OnClickListener() {

app/src/main/res/layout/activity_main.xml

@@ -29,6 +29,25 @@
             android:maxLines="2"
             android:textSize="20sp" />
 
+        <Button
+            android:id="@+id/buttonCrash"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="CRASH"
+            android:visibility="gone"
+            android:layout_gravity="center"
+            android:background="@android:color/holo_red_light"/>
+
+        <Button
+            android:id="@+id/buttonCrashJava"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="CRASH (java)"
+            android:visibility="gone"
+            android:layout_gravity="center_horizontal|top"
+            android:layout_marginTop="280dp"
+            android:background="@android:color/holo_orange_dark"/>
+
         <Button
             android:id="@+id/buttonSeven"
             style="@style/Widget.AppCompat.Button.Borderless"

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.1'
+        classpath 'com.android.tools.build:gradle:7.0.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Nov 08 15:53:49 IST 2019
+#Mon Sep 04 18:31:18 IST 2023
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip