commit | c3d52734ecaa3a5ce793ac1ae2613919fbe9a09a | [log] [tgz] |
---|---|---|
author | devashru <devashru@google.com> | Tue Jun 08 08:45:17 2021 -0700 |
committer | Michael Hoisie <hoisie@google.com> | Fri Jun 25 20:04:16 2021 -0700 |
tree | 40b0f9e88d9a48901b683f518e567704bb4ca34c | |
parent | bc3e9407c89c0ac466d39f79019fae3dd47e8d22 [diff] |
Adding support for @ReflectorObject. This is part of of larger initiative to replace directlyOn with reflector. The initialization is handled by ShadowWrangler and the mechanism is similar to @RealObject. The only difference is that the annotated variable will store reflector(ClassReflector.java, realObject) instead of just realObject. This avoids the overhead of creating a new object each time reflector(...) is invoked. From microbenchmarks in ReflectorTest, caching the reflector object is around 2x faster than creating a new reflector object on each invocation. The recommended use for this annotation is applying it to some instance variable objectReflector. Method calls by directlyOn(...) and reflector(...) can then simply be replaced by objectReflector.method(...). PiperOrigin-RevId: 378161587
Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead of an emulator.
Here's an example of a simple test written using Robolectric:
@RunWith(AndroidJUnit4.class) public class MyActivityTest { @Test public void clickingButton_shouldChangeResultsViewText() throws Exception { Activity activity = Robolectric.setupActivity(MyActivity.class); Button button = (Button) activity.findViewById(R.id.press_me_button); TextView results = (TextView) activity.findViewById(R.id.results_text_view); button.performClick(); assertThat(results.getText().toString(), equalTo("Testing Android Rocks!")); } }
For more information about how to install and use Robolectric on your project, extend its functionality, and join the community of contributors, please visit http://robolectric.org.
If you'd like to start a new project with Robolectric tests you can refer to deckard
(for either maven or gradle) as a guide to setting up both Android and Robolectric on your machine.
testImplementation "org.robolectric:robolectric:4.5.1"
Robolectric is built using Gradle. Both IntelliJ and Android Studio can import the top-level build.gradle
file and will automatically generate their project files from it.
Robolectric supports running tests against multiple Android API levels. The work it must do to support each API level is slightly different, so its shadows are built separately for each. To build shadows for every API version, run:
./gradlew clean assemble testClasses --parallel
If you would like to live on the bleeding edge, you can try running against a snapshot build. Keep in mind that snapshots represent the most recent changes on master and may contain bugs.
repositories { maven { url "https://oss.sonatype.org/content/repositories/snapshots" } } dependencies { testImplementation "org.robolectric:robolectric:4.6-SNAPSHOT" }