frameworks_base/tests/vcn/java/android/net/vcn/VcnGatewayConnectionConfigTest.java

/*
 * Copyright (C) 2020 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.vcn;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

import android.net.NetworkCapabilities;

import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;

import java.util.Arrays;
import java.util.concurrent.TimeUnit;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class VcnGatewayConnectionConfigTest {
    // Public for use in VcnGatewayConnectionTest
    public static final int[] EXPOSED_CAPS =
            new int[] {
                NetworkCapabilities.NET_CAPABILITY_INTERNET, NetworkCapabilities.NET_CAPABILITY_MMS
            };
    public static final int[] UNDERLYING_CAPS = new int[] {NetworkCapabilities.NET_CAPABILITY_DUN};

    static {
        Arrays.sort(EXPOSED_CAPS);
        Arrays.sort(UNDERLYING_CAPS);
    }

    public static final long[] RETRY_INTERVALS_MS =
            new long[] {
                TimeUnit.SECONDS.toMillis(5),
                TimeUnit.SECONDS.toMillis(30),
                TimeUnit.MINUTES.toMillis(1),
                TimeUnit.MINUTES.toMillis(5),
                TimeUnit.MINUTES.toMillis(15),
                TimeUnit.MINUTES.toMillis(30)
            };
    public static final int MAX_MTU = 1360;

    public static final VcnControlPlaneConfig CONTROL_PLANE_CONFIG =
            VcnControlPlaneIkeConfigTest.buildTestConfig();

    // Public for use in VcnGatewayConnectionTest
    public static VcnGatewayConnectionConfig buildTestConfig() {
        return buildTestConfigWithExposedCaps(EXPOSED_CAPS);
    }

    private static VcnGatewayConnectionConfig.Builder newBuilder() {
        return new VcnGatewayConnectionConfig.Builder(CONTROL_PLANE_CONFIG);
    }

    // Public for use in VcnGatewayConnectionTest
    public static VcnGatewayConnectionConfig buildTestConfigWithExposedCaps(int... exposedCaps) {
        final VcnGatewayConnectionConfig.Builder builder =
                newBuilder().setRetryInterval(RETRY_INTERVALS_MS).setMaxMtu(MAX_MTU);

        for (int caps : exposedCaps) {
            builder.addExposedCapability(caps);
        }

        for (int caps : UNDERLYING_CAPS) {
            builder.addRequiredUnderlyingCapability(caps);
        }

        return builder.build();
    }

    @Test
    public void testBuilderRequiresNonNullControlPlaneConfig() {
        try {
            new VcnGatewayConnectionConfig.Builder(null).build();

            fail("Expected exception due to invalid control plane config");
        } catch (NullPointerException e) {
        }
    }

    @Test
    public void testBuilderRequiresNonEmptyExposedCaps() {
        try {
            newBuilder()
                    .addRequiredUnderlyingCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                    .build();

            fail("Expected exception due to invalid exposed capabilities");
        } catch (IllegalArgumentException e) {
        }
    }

    @Test
    public void testBuilderRequiresNonEmptyUnderlyingCaps() {
        try {
            newBuilder().addExposedCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET).build();

            fail("Expected exception due to invalid required underlying capabilities");
        } catch (IllegalArgumentException e) {
        }
    }

    @Test
    public void testBuilderRequiresNonNullRetryInterval() {
        try {
            newBuilder().setRetryInterval(null);
            fail("Expected exception due to invalid retryIntervalMs");
        } catch (IllegalArgumentException e) {
        }
    }

    @Test
    public void testBuilderRequiresNonEmptyRetryInterval() {
        try {
            newBuilder().setRetryInterval(new long[0]);
            fail("Expected exception due to invalid retryIntervalMs");
        } catch (IllegalArgumentException e) {
        }
    }

    @Test
    public void testBuilderRequiresValidMtu() {
        try {
            newBuilder().setMaxMtu(VcnGatewayConnectionConfig.MIN_MTU_V6 - 1);
            fail("Expected exception due to invalid mtu");
        } catch (IllegalArgumentException e) {
        }
    }

    @Test
    public void testBuilderAndGetters() {
        final VcnGatewayConnectionConfig config = buildTestConfig();

        int[] exposedCaps = config.getExposedCapabilities();
        Arrays.sort(exposedCaps);
        assertArrayEquals(EXPOSED_CAPS, exposedCaps);

        int[] underlyingCaps = config.getRequiredUnderlyingCapabilities();
        Arrays.sort(underlyingCaps);
        assertArrayEquals(UNDERLYING_CAPS, underlyingCaps);

        assertEquals(CONTROL_PLANE_CONFIG, config.getControlPlaneConfig());
        assertFalse(CONTROL_PLANE_CONFIG == config.getControlPlaneConfig());

        assertArrayEquals(RETRY_INTERVALS_MS, config.getRetryIntervalsMs());
        assertEquals(MAX_MTU, config.getMaxMtu());
    }

    @Test
    public void testPersistableBundle() {
        final VcnGatewayConnectionConfig config = buildTestConfig();

        assertEquals(config, new VcnGatewayConnectionConfig(config.toPersistableBundle()));
    }
}