Groovy/Spock for Android app testing

Slide for potatotips #22 http://connpass.com/event/20240/

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Use Spock testing framework for unitt test on Android.

1. Groovy/Spock for Android app testing Masayuki IZUMI - @izumin5210 potatotips #22
2.  > Masayuki IZUMI a.k.a. @izumin5210 > Rekimoto Lab. at the University of Tokyo > Wantedly, Inc. > Rubyist / Androider / {Java,Type}Scripter
3. Ruby JavaScript Android Design
4. Parameterized test with JUnit
5. public class GreeterTest { @Test public void sayHello() throws Exception { Greeter greeter = new Greeter(); assertEquals("Hello", greeter.say()); } }
6. public class GreeterTest { private Greeter greeter; @Before public void setUp() throws Exception { greeter = new Greeter(); } @Test public void sayMorning() throws Exception { assertEquals("Good morning", greeter.say("morning")); } @Test public void sayHello() throws Exception { assertEquals("Hello", greeter.say("afternoon")); } }
7. public class GreeterTest { private Greeter greeter; @Before public void setUp() throws Exception { greeter = new Greeter(); } @Test public void sayMorning() throws Exception { assertEquals("Good morning", greeter.say("morning")); } @Test public void sayHello() throws Exception { assertEquals("Hello", greeter.say("afternoon")); } @Test public void sayNight() throws Exception { assertEquals("Good night", greeter.say("night")); } }
8. public class GreeterTest { @Test public void say() throws Exception { Greeter greeter = new Greeter(); String[][] pairs = { {"morning", "Good morning"}, {"afternoon", "Hello"}, {"night", "Good night"} }; for (String[] pair : pairs) { assertEquals(pair[1], greeter.say(pair[0])); } } }
9. @RunWith(Theories.class) public class GreeterTest { public static class Fixture { /* ... */ } @DataPoints public static Fixture[] getParameters() { return new Fixture[] { new Fixture("morning", "Good morning"), /* ... */ }; } @Theory public void say(Fixture fixture) throws Exception { Greeter greeter = new Greeter(); assertEquals(fixture.getExpected(), greeter.say(fixture.getArg())); } }
10. Parameterized test with JUnit  Too complecated and verbose  Stop execution when assertion failed - run -> fail -> fix -> run -> fail -> fix -> run -> fail ...
11. Spock “The Enterprise-ready testing and specification framework.” https://github.com/spockframework/spock https://www.flickr.com/photos/124561666@N02/14218023847
12. Spock  Testing framework written in Groovy  Inspired from JUnit, RSpec, Mockito, ...  Very fluent specification DSL (like RSpec?)  Descriptive assertion message (Power Assert!!!)
13. Installation buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.2.3' classpath 'org.codehaus.groovy:gradle-groovy-android-plugin:0.3.6' } }
14. Installation buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.2.3' classpath 'org.codehaus.groovy:gradle-groovy-android-plugin:0.3.6' } }
15. Installation buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.2.3' classpath 'org.codehaus.groovy:gradle-groovy-android-plugin:0.3.6' } } gradle-groovy-android-plugin 0.3.6 has not supported android gradle plugin 1.3 higher... 
16. Installation dependencies { // ... testCompile "org.spockframework:spock-core:1.0-groovy-2.4" }
17. GreeterSpec with Spock class GreeterSpec extends Specification { def "#say()"() { expect: expected == new Greeter().say(period) where: period | expected "morning" | "Good morning" "afternoon" | "Hello" "night" | "Good night" } }
18. GreeterSpec with Spock class GreeterSpec extends Specification { def "#say()"() { expect: expected == new Greeter().say(period) where: period | expected "morning" | "Good morning" "afternoon" | "Hello" "night" | "Good night" } }
19. GreeterSpec with Spock class GreeterSpec extends Specification { def "#say()"() { expect: expected == new Greeter().say(period) where: period | expected "morning" | "Good morning" "afternoon" | "Hello" "night" | "Good night" } }
20. Assertion message
21. Assertion message
22. JUnit v.s. Spock
23. https://speakerdeck.com/jnchito/number-kanrk06
24. Groovy/Spock for Android app testing Masayuki IZUMI - @izumin5210 potatotips #22