Add tests for property reads from unset properties

Test: atest FrameworksCoreSystemPropertiesTests
Bug: 144958550

Change-Id: I33c02013f6fb42c3cd974f76cd593940d4f1705b

1 files changed, 10 insertions, 0 deletions

diff --git a/core/tests/systemproperties/src/android/os/SystemPropertiesTest.java b/core/tests/systemproperties/src/android/os/SystemPropertiesTest.java
index b48ac3347093..9f70538191c2 100644
--- a/core/tests/systemproperties/src/android/os/SystemPropertiesTest.java
+++ b/core/tests/systemproperties/src/android/os/SystemPropertiesTest.java
@@ -26,6 +26,7 @@ import java.util.concurrent.TimeUnit;
 
 public class SystemPropertiesTest extends TestCase {
     private static final String KEY = "sys.testkey";
+    private static final String UNSET_KEY = "Aiw7woh6ie4toh7W";
     private static final String PERSIST_KEY = "persist.sys.testkey";
 
     @SmallTest
@@ -133,6 +134,15 @@ public class SystemPropertiesTest extends TestCase {
     }
 
     @SmallTest
+    public void testUnset() throws Exception {
+        assertEquals("abc", SystemProperties.get(UNSET_KEY, "abc"));
+        assertEquals(true, SystemProperties.getBoolean(UNSET_KEY, true));
+        assertEquals(false, SystemProperties.getBoolean(UNSET_KEY, false));
+        assertEquals(5, SystemProperties.getInt(UNSET_KEY, 5));
+        assertEquals(-10, SystemProperties.getLong(UNSET_KEY, -10));
+    }
+
+    @SmallTest
     @SuppressWarnings("null")
     public void testNullKey() throws Exception {
         try {