From 99495b1a4dd9b677ba29834ede4dfd7dc9f24454 Mon Sep 17 00:00:00 2001
From: Hugo Benichi <hugobenichi@google.com>
Date: Mon, 26 Jun 2017 10:06:49 +0900
Subject: [PATCH] ConnectivityServiceTest: more informative assert failures

Bug: 62918393
Test: runtest frameworks-net
Change-Id: If87315ef7cba6380596f48b92c7e0f6eeccc8368
---
 .../server/ConnectivityServiceTest.java       | 29 +++++++++++++------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index 76f112ad2d..1418be6b55 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -865,7 +865,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         assertNull(mCm.getActiveNetwork());
         assertNull(mCm.getActiveNetworkForUid(Process.myUid()));
         // Test getAllNetworks()
-        assertEquals(0, mCm.getAllNetworks().length);
+        assertEmpty(mCm.getAllNetworks());
     }
 
     /**
@@ -906,7 +906,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         mCellNetworkAgent.connect(true);
         waitFor(cv);
         verifyActiveNetwork(TRANSPORT_CELLULAR);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
         assertTrue(mCm.getAllNetworks()[0].equals(mCm.getActiveNetwork()) ||
                 mCm.getAllNetworks()[1].equals(mCm.getActiveNetwork()));
         assertTrue(mCm.getAllNetworks()[0].equals(mWiFiNetworkAgent.getNetwork()) ||
@@ -916,7 +916,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         mWiFiNetworkAgent.connect(true);
         waitFor(cv);
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
         assertTrue(mCm.getAllNetworks()[0].equals(mCm.getActiveNetwork()) ||
                 mCm.getAllNetworks()[1].equals(mCm.getActiveNetwork()));
         assertTrue(mCm.getAllNetworks()[0].equals(mCellNetworkAgent.getNetwork()) ||
@@ -924,9 +924,9 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         // Test cellular linger timeout.
         waitFor(mCellNetworkAgent.getDisconnectedCV());
         waitForIdle();
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         assertEquals(mCm.getAllNetworks()[0], mCm.getActiveNetwork());
         // Test WiFi disconnect.
         cv = waitForConnectivityBroadcasts(1);
@@ -1855,7 +1855,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         mCellNetworkAgent.connectWithoutInternet();
         waitFor(cv);
         waitForIdle();
-        assertEquals(0, mCm.getAllNetworks().length);
+        assertEmpty(mCm.getAllNetworks());
         verifyNoNetwork();
 
         // Test bringing up validated WiFi.
@@ -2529,7 +2529,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         assertTrue(testFactory.getMyStartRequested());
 
         // Bring up cell data and check that the factory stops looking.
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
         mCellNetworkAgent = new MockNetworkAgent(TRANSPORT_CELLULAR);
         testFactory.expectAddRequests(2);  // Because the cell request changes score twice.
         mCellNetworkAgent.connect(true);
@@ -2540,7 +2540,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
         // Check that cell data stays up.
         waitForIdle();
         verifyActiveNetwork(TRANSPORT_WIFI);
-        assertEquals(2, mCm.getAllNetworks().length);
+        assertLength(2, mCm.getAllNetworks());
 
         // Turn off mobile data always on and expect the request to disappear...
         testFactory.expectRemoveRequests(1);
@@ -2549,7 +2549,7 @@ public class ConnectivityServiceTest extends AndroidTestCase {
 
         // ...  and cell data to be torn down.
         cellNetworkCallback.expectCallback(CallbackState.LOST, mCellNetworkAgent);
-        assertEquals(1, mCm.getAllNetworks().length);
+        assertLength(1, mCm.getAllNetworks());
 
         testFactory.unregister();
         mCm.unregisterNetworkCallback(cellNetworkCallback);
@@ -3238,4 +3238,15 @@ public class ConnectivityServiceTest extends AndroidTestCase {
             mCm.unregisterNetworkCallback(pendingIntent);
         }
     }
+
+    private static <T> void assertEmpty(T[] ts) {
+        int length = ts.length;
+        assertEquals("expected empty array, but length was " + length, 0, length);
+    }
+
+    private static <T> void assertLength(int expected, T[] got) {
+        int length = got.length;
+        assertEquals(String.format("expected array of length %s, but length was %s for %s",
+                expected, length, Arrays.toString(got)), expected, length);
+    }
 }