Add roboelectric test

README.markdown

@@ -27,6 +27,13 @@ Run
 
 For more command, refer to [android-sdk-plugin for sbt](https://github.com/pfn/android-sdk-plugin).
 
+Test
+-----
+A simple [Robolectric](http://robolectric.org/) test is implemented. You can run it with:
+
+    $ sbt test
+
+
 Tips for faster development iteration
 -------------------------------------
 In sbt, `~` is a prefix that repeatedly runs the command when the source code is modified.

build.sbt

@@ -19,3 +19,15 @@ libraryDependencies += "org.scaloid" %% "scaloid" % "4.1"
 
 run <<= run in Android
 install <<= install in Android
+
+// Tests //////////////////////////////
+
+libraryDependencies ++= Seq(
+  "org.apache.maven" % "maven-ant-tasks" % "2.1.3" % "test",
+  "org.robolectric" % "robolectric" % "3.0" % "test",
+  "junit" % "junit" % "4.12" % "test",
+  "com.novocode" % "junit-interface" % "0.11" % "test"
+)
+
+// without this, @Config throws an exception,
+unmanagedClasspath in Test ++= (bootClasspath in Android).value

src/main/scala/scaloid/example/HelloScaloid.scala

@@ -5,6 +5,7 @@ import android.graphics.Color
 
 class HelloScaloid extends SActivity {
   lazy val meToo = new STextView("Me too")
+  lazy val redBtn = new SButton(R.string.red)
 
   onCreate {
     contentView = new SVerticalLayout {
@@ -18,7 +19,7 @@ class HelloScaloid extends SActivity {
       STextView("I am 15 dip tall") textSize 15.dip // overriding
       new SLinearLayout {
         STextView("Button: ")
-        SButton(R.string.red)
+        redBtn.here
       }.wrap.here
       SEditText("Yellow input field fills the space").fill
     } padding 20.dip

src/test/scala/scaloid/example/HelloScaloidTest.scala

@@ -0,0 +1,18 @@
+package scaloid.example
+
+import org.junit.Assert._
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.annotation.Config
+import org.robolectric.{Robolectric, RobolectricTestRunner}
+
+@RunWith(classOf[RobolectricTestRunner])
+@Config(manifest = "src/main/AndroidManifest.xml")
+class HelloScaloidTest {
+  @Test def testButtonPressed(): Unit = {
+    val activity = Robolectric.setupActivity(classOf[HelloScaloid])
+    assertTrue(activity.meToo.text == "Me too")
+    activity.redBtn.performClick()
+    assertTrue(activity.meToo.text == "PRESSED")
+  }
+}