Add test for Variant.isSigned().

Change-Id: Ib7afa512e3bf6444a6b80fd3b0df0e03e62883ff
diff --git a/gradle-model/src/test/java/com/android/build/gradle/model/AndroidProjectTest.java b/gradle-model/src/test/java/com/android/build/gradle/model/AndroidProjectTest.java
index 15be5f3..6146b1d 100644
--- a/gradle-model/src/test/java/com/android/build/gradle/model/AndroidProjectTest.java
+++ b/gradle-model/src/test/java/com/android/build/gradle/model/AndroidProjectTest.java
@@ -76,15 +76,19 @@
                     .test();
 
             // this variant is tested.
-            assertNotNull(debugVariant.getAssembleTaskName());
-            assertNotNull(debugVariant.getOutputTestFile());
+            assertNotNull("Debug assemble test task null-check",
+                    debugVariant.getAssembleTestTaskName());
+            assertNotNull("Debug test output file null-check", debugVariant.getOutputTestFile());
+            assertTrue("Debug signed check", debugVariant.isSigned());
 
             // release variant, not tested.
             Variant releaseVariant = variants.get("release");
-            assertNotNull(releaseVariant);
+            assertNotNull("Release Variant null-check", releaseVariant);
 
-            assertNull(releaseVariant.getAssembleTestTaskName());
-            assertNull(releaseVariant.getOutputTestFile());
+            assertNull("Release assemble test task null-check",
+                    releaseVariant.getAssembleTestTaskName());
+            assertNull("Release test output file null-check", releaseVariant.getOutputTestFile());
+            assertFalse("Release signed check", releaseVariant.isSigned());
 
             Dependencies dependencies = model.getDefaultConfig().getDependencies();
             assertNotNull(dependencies);
diff --git a/tests/basic/build.gradle b/tests/basic/build.gradle
index 948ca5e..7a415a7 100644
--- a/tests/basic/build.gradle
+++ b/tests/basic/build.gradle
@@ -32,7 +32,6 @@
         versionName "2.0"
         minSdkVersion 16
         targetSdkVersion 16
-        signingConfig signingConfigs.myConfig
 
         buildConfig "private final static boolean DEFAULT = true;", \
                     "private final static String FOO = \"foo\";"
@@ -41,6 +40,7 @@
     buildTypes {
         debug {
             packageNameSuffix ".debug"
+            signingConfig signingConfigs.myConfig
 
             buildConfig "private final static boolean DEBUG2 = false;"
         }