Add CTS for verifying ConnectivityManager.getNetworkWatchlistConfigHash()

Bug: 63908748
Test: cts-tradefed run cts -m CtsNetTestCases -t android.net.cts.NetworkWatchlistTest
Change-Id: I9c7c9349287a0a856aec128b3fa5560359921155

tests/cts/net/assets/network_watchlist_config_for_test.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright (C) 2018 The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<!-- This test config file just contains some random hashes for testing
+ConnectivityManager.getWatchlistConfigHash() -->
+<watchlist-config>
+    <sha256-domain>
+        <hash>F0905DA7549614957B449034C281EF7BDEFDBC2B6E050AD1E78D6DE18FBD0D5F</hash>
+    </sha256-domain>
+    <sha256-ip>
+        <hash>18DD41C9F2E8E4879A1575FB780514EF33CF6E1F66578C4AE7CCA31F49B9F2EC</hash>
+    </sha256-ip>
+    <crc32-domain>
+        <hash>AAAAAAAA</hash>
+    </crc32-domain>
+    <crc32-ip>
+        <hash>BBBBBBBB</hash>
+    </crc32-ip>
+</watchlist-config>

tests/cts/net/src/android/net/cts/NetworkWatchlistTest.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.os.FileUtils;
+import android.support.test.InstrumentationRegistry;
+import android.test.AndroidTestCase;
+
+import com.android.compatibility.common.util.ApiLevelUtil;
+import com.android.compatibility.common.util.SystemUtil;
+
+import org.junit.Assert;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Formatter;
+
+public class NetworkWatchlistTest extends AndroidTestCase {
+
+    private static final String TEST_WATCHLIST_XML = "assets/network_watchlist_config_for_test.xml";
+    private static final String SDCARD_CONFIG_PATH =
+            "/sdcard/network_watchlist_config_for_test.xml";
+    private static final String TMP_CONFIG_PATH =
+            "/data/local/tmp/network_watchlist_config_for_test.xml";
+    // Generated from sha256sum network_watchlist_config_for_test.xml
+    private static final String TEST_WATCHLIST_CONFIG_HASH =
+            "B5FC4636994180D54E1E912F78178AB1D8BD2BE71D90CA9F5BBC3284E4D04ED4";
+
+    private Context mContext;
+    private boolean mHasFeature;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mContext = getContext();
+        mHasFeature = isAtLeastP();
+        runCommand("rm " + SDCARD_CONFIG_PATH);
+        runCommand("rm " + TMP_CONFIG_PATH);
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        super.tearDown();
+        runCommand("rm " + SDCARD_CONFIG_PATH);
+        runCommand("rm " + TMP_CONFIG_PATH);
+    }
+
+    private boolean isAtLeastP() throws Exception {
+        // TODO: replace with ApiLevelUtil.isAtLeast(Build.VERSION_CODES.P) when the P API level
+        // constant is defined.
+        return ApiLevelUtil.getCodename().compareToIgnoreCase("P") >= 0;
+    }
+
+    /**
+     * Test if ConnectivityManager.getNetworkWatchlistConfigHash() correctly
+     * returns the hash of config we set.
+     */
+    public void testGetWatchlistConfigHash() throws Exception {
+        if (!mHasFeature) {
+            return;
+        }
+        // TODO: Test watchlist config does not exist case
+        // Save test watchlist config to sdcard as app can't access /data/local/tmp
+        saveResourceToFile(TEST_WATCHLIST_XML, SDCARD_CONFIG_PATH);
+        // Copy test watchlist config from sdcard to /data/local/tmp as systerm service
+        // can't access /sdcard
+        runCommand("cp " + SDCARD_CONFIG_PATH + " " + TMP_CONFIG_PATH);
+        // Set test watchlist config to system
+        final String cmdResult = runCommand(
+                "cmd network_watchlist set-test-config " + TMP_CONFIG_PATH).trim();
+        assertTrue(cmdResult.contains("Success"));
+        // Test if watchlist config hash value is correct
+        ConnectivityManager connectivityManager =
+                (ConnectivityManager) getContext().getSystemService(
+                        Context.CONNECTIVITY_SERVICE);
+        byte[] result = connectivityManager.getNetworkWatchlistConfigHash();
+        Assert.assertEquals(TEST_WATCHLIST_CONFIG_HASH, byteArrayToHexString(result));
+    }
+
+    private static String byteArrayToHexString(byte[] bytes) {
+        Formatter formatter = new Formatter();
+        for (byte b : bytes) {
+            formatter.format("%02X", b);
+        }
+        return formatter.toString();
+    }
+
+    private void saveResourceToFile(String res, String filePath) throws IOException {
+        InputStream in = getClass().getClassLoader().getResourceAsStream(res);
+        FileUtils.copyToFileOrThrow(in, new File(filePath));
+    }
+
+    private static String runCommand(String command) throws IOException {
+        return SystemUtil.runShellCommand(InstrumentationRegistry.getInstrumentation(), command);
+    }
+}