[Andoird] 在Android Studio的專案中使用Robolectric做測試. Add Robolectric to an Android Studio Project

Reference:

Robolectric Homepage
http://robolectric.org/getting-started/

A good Tutorial of Setting up Robolectric
https://github.com/codepath/android_guides/wiki/Robolectric-Installation-for-Unit-Testing



1. modify the Top-level build.gradle.
Add robolectric gradle plugin to dependencies.

dependencies {
        ...

        classpath 'org.robolectric:robolectric-gradle-plugin:1.0.1'
    }

2. modify the app-level build.gradle.
Add following line

apply plugin: 'org.robolectric'

...

dependencies {
    ...

    testCompile 'junit:junit:4.12'
    testCompile 'org.robolectric:robolectric:2.4'
 
}

3. Add test file under [Your Project]/app/src/test/[test files]
The test folder is at the same level with the "main" folder.

4. Write the test files

import org.junit.Test;
import org.junit.runner.RunWith;

import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;

@Config(emulateSdk = 18)
@RunWith(RobolectricTestRunner.class)
public class TestFile {

    @Test
    public void testIt() {
        // failing test gives much better feedback
        // to show that all works correctly ;)
        assertEquals(false, true);
    }
}

5. run the test command "./gradlew test" to run test