This is a demo project to show how spoon works with espresso.

Test runner and reporting tool which runs instrumentation tests. Spoon runs tests on all devices detected by adb. After the tests complete, spoon generates easy, meaningful summary in HTML.

More about Spoon: https://square.github.io/spoon/

I took Espresso as my instrumentation tests. Espresso is light-weight instrumentation tests and FAST !

More about Espresso: https://code.google.com/p/android-test-kit/wiki/Espresso

app/build.gradle

1. Add classpath to build script dependencies

dependencies {
  classpath 'com.stanfy.spoon:spoon-gradle-plugin:1.2.2'
}

2. Apply spoon plugin

apply plugin: 'spoon'

3. Add dependencies

androidTestCompile 'com.android.support.test.espresso:espresso-core:3.0.1'
androidTestCompile 'com.squareup.spoon:spoon-client:1.7.1'

4. Add testInstrumentationRunner to defaultConfig

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

5. Add these lines to fix duplicate files issue

packagingOptions {
  exclude 'LICENSE.txt'
}

6. Add spoon block

spoon {
  debug = true
}

public void testSetMismatchError() {
  // Make screenshot before performance
  Spoon.screenshot(getActivity(), "initial_state");

  // Setup
  onView(withId(R.id.email)).perform(typeText("[email protected]\n"));
  onView(withId(R.id.password)).perform(typeText("lemoncake\n"));

  // Action
  onView(withId(R.id.submit)).perform(click());

  // Make screenshot after performance
  Spoon.screenshot(getActivity(), "after_state");    

  // Test
  onView(withText(R.string.msg_mismatch)).check(matches(isDisplayed()));
}

It's Simple ! Plug-in all devices you want to test or open GenyMotion emulators and execute

$ ./gradlew spoon

After run, spoon generates spoon folder in app/build directory. You can open index.html and see the result.

https://cdn.rawgit.com/emmasuzuki/EspressoSpoonDemo/master/app/build/spoon/debug/index.html

Also this page is dynamic so you can click on red bar to see details.

Jacoco is a code coverage for Java. It includes following analysis:

• Line coverage
• Method coverage
• Branch coverage
• Block coverage

Spoon and Jacoco are both reporting tools. Spoon is more like a dev friendly output to find what test is failing and why. While Jacoco is coverage tool where it shows which lines are tested and which are not plus overall metrics of how much your code is tested.

See in action: https://cdn.rawgit.com/emmasuzuki/EspressoSpoonDemo/master/app/build/reports/coverage/debug/index.html

Setup: app/build.gradle

1. Enable coverage

   buildScript {
     ...
     dependencies {
       classpath 'org.jacoco:org.jacoco.core:0.7.5.201505241946'
     }
   }
   
   ...
   apply plugin: 'jacoco'
   ...
   
   android {
     buildTypes {
       debug {
         testCoverageEnabled true
       }
     }
     ...
   }
   

Run

$./gradlew createDebugCoverageReport

After run the command, files are generated at app/build/reports/coverage/. Open index.html and see your report.

Jacoco won't generate report when tests are failing. To obtain the jacoco report, make all tests pass first then run the command above.