[SP06.2] add method to support order insensitive equals for NetworkStats

/*

 * 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 com.android.testutils

import android.net.NetworkStats

fun orderInsensitiveEquals(

    leftStats: NetworkStats,

    rightStats: NetworkStats

): Boolean {

    if (leftStats == rightStats) return true

    if (leftStats.getElapsedRealtime() != rightStats.getElapsedRealtime() ||

            leftStats.size() != rightStats.size()) return false

    val left = NetworkStats.Entry()

    val right = NetworkStats.Entry()

    // Order insensitive compare.

    for (i in 0 until leftStats.size()) {

        leftStats.getValues(i, left)

        val j: Int = rightStats.findIndexHinted(left.iface, left.uid, left.set, left.tag,

                left.metered, left.roaming, left.defaultNetwork, i)

        rightStats.getValues(j, right)

        if (left != right) return false

    }

    return true

}

/*

 * 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.testutils

import android.net.NetworkStats

import android.net.NetworkStats.SET_DEFAULT

import android.net.NetworkStats.TAG_NONE

import com.android.testutils.orderInsensitiveEquals

import org.junit.Test

import org.junit.runner.RunWith

import org.junit.runners.JUnit4

import kotlin.test.assertFalse

import kotlin.test.assertTrue

private const val TEST_IFACE = "test0"

private const val TEST_IFACE2 = "test2"

private const val TEST_START = 1194220800000L

@RunWith(JUnit4::class)

class NetworkStatsUtilsTest {

    @Test

    fun testOrderInsensitiveEquals() {

        val testEntry = arrayOf(

                NetworkStats.Entry(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 2L, 20L),

                NetworkStats.Entry(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 512L, 32L, 0L, 0L, 0L))

        // Verify equals of empty stats regardless of initial capacity.

        val red = NetworkStats(TEST_START, 0)

        val blue = NetworkStats(TEST_START, 1)

        assertTrue(orderInsensitiveEquals(red, blue))

        assertTrue(orderInsensitiveEquals(blue, red))

        // Verify not equal.

        red.combineValues(testEntry[1])

        blue.combineValues(testEntry[0]).combineValues(testEntry[1])

        assertFalse(orderInsensitiveEquals(red, blue))

        assertFalse(orderInsensitiveEquals(blue, red))

        // Verify equals even if the order of entries are not the same.

        red.combineValues(testEntry[0])

        assertTrue(orderInsensitiveEquals(red, blue))

        assertTrue(orderInsensitiveEquals(blue, red))

    }

}

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