Separate testing infrastructure into it's own module.

rxpermission-testing/build.gradle

@@ -0,0 +1,31 @@
+apply plugin: 'com.android.library'
+
+afterEvaluate {
+  generateReleaseBuildConfig.enabled = false
+}
+
+android {
+  compileSdkVersion versions.compileSdk
+
+  defaultConfig {
+    minSdkVersion versions.minSdk
+  }
+
+  resourcePrefix 'rx_permission_mock_'
+
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_1_7
+    targetCompatibility JavaVersion.VERSION_1_7
+  }
+}
+
+dependencies {
+  api project(":rxpermission")
+}
+
+dependencies {
+  testImplementation deps.test.junit
+  testImplementation deps.test.assertj3
+}
+
+apply plugin: "com.vanniktech.maven.publish"

rxpermission-testing/gradle.properties

@@ -0,0 +1,3 @@
+POM_NAME=RxPermission Testing
+POM_ARTIFACT_ID=rxpermission-testing
+POM_PACKAGING=aar

rxpermission-testing/src/main/AndroidManifest.xml

@@ -0,0 +1 @@
+<manifest package="com.vanniktech.rxpermission.testing"/>

library/src/main/java/com/vanniktech/rxpermission/MockRxPermission.java → rxpermission-testing/src/main/java/com/vanniktech/rxpermission/testing/MockRxPermission.java

@@ -1,5 +1,7 @@
-package com.vanniktech.rxpermission;
+package com.vanniktech.rxpermission.testing;
 
+import com.vanniktech.rxpermission.Permission;
+import com.vanniktech.rxpermission.RxPermission;
 import io.reactivex.Observable;
 import io.reactivex.Single;
 import io.reactivex.annotations.CheckReturnValue;
@@ -9,7 +11,7 @@
 
 import static com.vanniktech.rxpermission.Permission.State.GRANTED;
 import static com.vanniktech.rxpermission.Permission.State.REVOKED_BY_POLICY;
-import static com.vanniktech.rxpermission.Utils.checkPermissions;
+import static com.vanniktech.rxpermission.testing.Utils.checkPermissions;
 
 /**
  * Mocking class that can be used for unit testing.

rxpermission-testing/src/main/java/com/vanniktech/rxpermission/testing/Utils.java

@@ -0,0 +1,13 @@
+package com.vanniktech.rxpermission.testing;
+
+final class Utils {
+  static void checkPermissions(final String[] permissions) {
+    if (permissions == null || permissions.length == 0) {
+      throw new IllegalArgumentException("permissions are null or empty");
+    }
+  }
+
+  private Utils() {
+    throw new AssertionError("No instances.");
+  }
+}

library/src/test/java/com/vanniktech/rxpermission/MockRxPermissionTest.java → rxpermission-testing/src/test/java/com/vanniktech/rxpermission/testing/MockRxPermissionTest.java

@@ -1,18 +1,15 @@
-package com.vanniktech.rxpermission;
+package com.vanniktech.rxpermission.testing;
 
 import android.annotation.SuppressLint;
 import org.junit.Before;
-import org.junit.Rule;
 import org.junit.Test;
-import org.junit.rules.ExpectedException;
 
 import static android.Manifest.permission.CALL_PHONE;
 import static android.Manifest.permission.CAMERA;
 import static org.assertj.core.api.Java6Assertions.assertThat;
+import static org.junit.Assert.fail;
 
 public final class MockRxPermissionTest {
-  @Rule public final ExpectedException expectedException = ExpectedException.none();
-
   private Permission callPhoneGranted;
 
   private Permission cameraGranted;

sample/build.gradle

@@ -27,7 +27,7 @@ android {
 }
 
 dependencies {
-  implementation project(':library')
+  implementation project(':rxpermission')
 
   implementation deps.support.appCompat
 }

settings.gradle

@@ -1,2 +1,3 @@
-include ':library'
+include ':rxpermission'
+include ':rxpermission-testing'
 include ':sample'