Merge "Add missing test coverage for TcpInfo" into main am: 96d8031ff8

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2836336

Change-Id: I97bbb40e8cbbdf895b0bee0a55b6360447c1a46d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

src/com/android/networkstack/netlink/TcpInfo.java

diff --git a/src/com/android/networkstack/netlink/TcpInfo.java b/src/com/android/networkstack/netlink/TcpInfo.java
index 73d206e..de450e9 100644
--- a/src/com/android/networkstack/netlink/TcpInfo.java
+++ b/src/com/android/networkstack/netlink/TcpInfo.java
@@ -170,7 +170,8 @@
         }
     }
 
-    private static String decodeWscale(byte num) {
+    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+    static String decodeWscale(byte num) {
         return String.valueOf((num >> 4) & 0x0f)  + ":" + String.valueOf(num & 0x0f);
     }
 

tests/unit/src/com/android/networkstack/netlink/TcpInfoTest.java

diff --git a/tests/unit/src/com/android/networkstack/netlink/TcpInfoTest.java b/tests/unit/src/com/android/networkstack/netlink/TcpInfoTest.java
index 380f4ec..ff56f5f 100644
--- a/tests/unit/src/com/android/networkstack/netlink/TcpInfoTest.java
+++ b/tests/unit/src/com/android/networkstack/netlink/TcpInfoTest.java
@@ -242,4 +242,20 @@
 
         return info;
     }
+
+    @Test
+    public void testHashCode() {
+        final TcpInfo info = new TcpInfo(2, 1, 5);
+        final TcpInfo info2 = new TcpInfo(2, 1, 5);
+
+        assertEquals(info, info2);
+        assertEquals(info.hashCode(), info2.hashCode());
+    }
+
+    @Test
+    public void testDecodeWscale() {
+        assertEquals("0:0", TcpInfo.decodeWscale((byte) 0));
+        assertEquals("15:15", TcpInfo.decodeWscale((byte) 255));
+        assertEquals("15:0", TcpInfo.decodeWscale((byte) 240));
+    }
 }