56 lines
2.3 KiB
Kotlin
56 lines
2.3 KiB
Kotlin
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.server
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import android.os.Build
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import androidx.test.filters.SmallTest
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import com.android.server.NetIdManager.MIN_NET_ID
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import com.android.testutils.DevSdkIgnoreRule
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import com.android.testutils.DevSdkIgnoreRunner
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import com.android.testutils.ExceptionUtils.ThrowingRunnable
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import com.android.testutils.assertThrows
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import org.junit.Test
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import org.junit.runner.RunWith
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import kotlin.test.assertEquals
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@RunWith(DevSdkIgnoreRunner::class)
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@SmallTest
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@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
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class NetIdManagerTest {
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@Test
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fun testReserveReleaseNetId() {
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val manager = NetIdManager(MIN_NET_ID + 4)
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assertEquals(MIN_NET_ID, manager.reserveNetId())
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assertEquals(MIN_NET_ID + 1, manager.reserveNetId())
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assertEquals(MIN_NET_ID + 2, manager.reserveNetId())
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assertEquals(MIN_NET_ID + 3, manager.reserveNetId())
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manager.releaseNetId(MIN_NET_ID + 1)
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manager.releaseNetId(MIN_NET_ID + 3)
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// IDs only loop once there is no higher ID available
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assertEquals(MIN_NET_ID + 4, manager.reserveNetId())
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assertEquals(MIN_NET_ID + 1, manager.reserveNetId())
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assertEquals(MIN_NET_ID + 3, manager.reserveNetId())
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assertThrows(IllegalStateException::class.java, ThrowingRunnable { manager.reserveNetId() })
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manager.releaseNetId(MIN_NET_ID + 5)
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// Still no ID available: MIN_NET_ID + 5 was not reserved
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assertThrows(IllegalStateException::class.java, ThrowingRunnable { manager.reserveNetId() })
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manager.releaseNetId(MIN_NET_ID + 2)
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// Throwing an exception still leaves the manager in a working state
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assertEquals(MIN_NET_ID + 2, manager.reserveNetId())
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}
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}
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