Merge "[WifiScoreCard] Evict stale items from memory"

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/wifitests/src/com/android/server/wifi/WifiScoreCardTest.java b/tests/wifitests/src/com/android/server/wifi/WifiScoreCardTest.java
index 577f5bc65..1afa42ad6 100644
--- a/tests/wifitests/src/com/android/server/wifi/WifiScoreCardTest.java
+++ b/tests/wifitests/src/com/android/server/wifi/WifiScoreCardTest.java
@@ -494,4 +494,38 @@ public class WifiScoreCardTest {
         assertEquals(0, leftovers.length);
     }
 
+    /**
+     * Test that older items are evicted from memory.
+     */
+    @Test
+    public void testOlderItemsShouldBeEvicted() throws Exception {
+        mWifiInfo.setRssi(-55);
+        mWifiInfo.setFrequency(5805);
+        mWifiInfo.setLinkSpeed(384);
+        mWifiScoreCard.installMemoryStore(mMemoryStore);
+        for (int i = 0; i < 256; i++) {
+            MacAddress bssid = MacAddress.fromBytes(new byte[]{2, 2, 2, 2, 2, (byte) i});
+            mWifiInfo.setBSSID(bssid.toString());
+            mWifiScoreCard.noteSignalPoll(mWifiInfo);
+        }
+
+        verify(mMemoryStore, times(256)).read(any(), any());
+        verify(mMemoryStore, atLeastOnce()).write(any(), any()); // Assumes target size < 256
+        reset(mMemoryStore);
+
+        for (int i = 256 - 3; i < 256; i++) {
+            MacAddress bssid = MacAddress.fromBytes(new byte[]{2, 2, 2, 2, 2, (byte) i});
+            mWifiInfo.setBSSID(bssid.toString());
+            mWifiScoreCard.noteSignalPoll(mWifiInfo);
+        }
+        verify(mMemoryStore, never()).read(any(), any()); // Assumes target size >= 3
+
+        for (int i = 0; i < 3; i++) {
+            MacAddress bssid = MacAddress.fromBytes(new byte[]{2, 2, 2, 2, 2, (byte) i});
+            mWifiInfo.setBSSID(bssid.toString());
+            mWifiScoreCard.noteSignalPoll(mWifiInfo);
+        }
+        verify(mMemoryStore, times(3)).read(any(), any()); // Assumes target size < 253
+    }
+
 }