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.

Transcript

1. Groovy/Spock
   for Android app testing
   Masayuki IZUMI - @izumin5210
   potatotips #22
   

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2. 
   > Masayuki IZUMI a.k.a. @izumin5210
   > Rekimoto Lab. at the University of Tokyo
   > Wantedly, Inc.
   > Rubyist / Androider / {Java,Type}Scripter
   

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3. Ruby
   JavaScript
   Android
   Design
   

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4. Parameterized test
   with JUnit
   

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5. public class GreeterTest {
   @Test
   public void sayHello() throws Exception {
   Greeter greeter = new Greeter();
   assertEquals("Hello", greeter.say());
   }
   }
   

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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"));
   }
   }
   

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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"));
   }
   }
   

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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]));
   }
   }
   }
   

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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()));
   }
   }
   

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10. Parameterized test with JUnit
     Too complecated and verbose
     Stop execution when assertion failed
    - run -> fail -> fix -> run -> fail -> fix -> run -> fail ...
    

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11. Spock
    “The Enterprise-ready testing and specification framework.”
    https://github.com/spockframework/spock
    https://www.flickr.com/photos/124561666@N02/14218023847
    

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12. Spock
     Testing framework written in Groovy
     Inspired from JUnit, RSpec, Mockito, ...
     Very fluent specification DSL (like RSpec?)
     Descriptive assertion message (Power Assert!!!)
    

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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'
    }
    }
    

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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'
    }
    }
    

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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...
    
    

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16. Installation
    dependencies {
    // ...
    testCompile "org.spockframework:spock-core:1.0-groovy-2.4"
    }
    

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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"
    }
    }
    

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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"
    }
    }
    

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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"
    }
    }
    

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20. Assertion message
    

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21. Assertion message
    

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22. JUnit
    v.s.
    Spock
    

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23. https://speakerdeck.com/jnchito/number-kanrk06
    

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24. Groovy/Spock
    for Android app testing
    Masayuki IZUMI - @izumin5210
    potatotips #22
    

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