From dcd1bc82b9126b8122c671102d4d22843b73c847 Mon Sep 17 00:00:00 2001
From: Fabian Mastenbroek <mail.fabianm@gmail.com>
Date: Tue, 22 Jun 2021 11:22:14 +0200
Subject: simulator: Add virtual network switch

This change adds a virtual network switch to the OpenDC networking
module. Currently, the switch bridges the traffic equally across all
ports. In the future, we'll also add routing support to the switch.
---
 .../network/SimNetworkSwitchVirtualTest.kt         | 77 ++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 opendc-simulator/opendc-simulator-network/src/test/kotlin/org/opendc/simulator/network/SimNetworkSwitchVirtualTest.kt

(limited to 'opendc-simulator/opendc-simulator-network/src/test')

diff --git a/opendc-simulator/opendc-simulator-network/src/test/kotlin/org/opendc/simulator/network/SimNetworkSwitchVirtualTest.kt b/opendc-simulator/opendc-simulator-network/src/test/kotlin/org/opendc/simulator/network/SimNetworkSwitchVirtualTest.kt
new file mode 100644
index 00000000..3a749bfe
--- /dev/null
+++ b/opendc-simulator/opendc-simulator-network/src/test/kotlin/org/opendc/simulator/network/SimNetworkSwitchVirtualTest.kt
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2021 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.opendc.simulator.network
+
+import io.mockk.spyk
+import io.mockk.verify
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.opendc.simulator.core.runBlockingSimulation
+import org.opendc.simulator.resources.*
+import org.opendc.simulator.resources.consumer.SimWorkConsumer
+
+/**
+ * Test suite for the [SimNetworkSwitchVirtual] class.
+ */
+class SimNetworkSwitchVirtualTest {
+    @Test
+    fun testConnect() = runBlockingSimulation {
+        val interpreter = SimResourceInterpreter(coroutineContext, clock)
+        val sink = SimNetworkSink(interpreter, capacity = 100.0)
+        val source = spyk(Source(interpreter))
+        val switch = SimNetworkSwitchVirtual(interpreter)
+        val consumer = source.consumer
+
+        switch.newPort().connect(sink)
+        switch.newPort().connect(source)
+
+        assertTrue(sink.isConnected)
+        assertTrue(source.isConnected)
+
+        verify { source.createConsumer() }
+        verify { consumer.onEvent(any(), SimResourceEvent.Start) }
+    }
+
+    @Test
+    fun testConnectClosedPort() = runBlockingSimulation {
+        val interpreter = SimResourceInterpreter(coroutineContext, clock)
+        val sink = SimNetworkSink(interpreter, capacity = 100.0)
+        val switch = SimNetworkSwitchVirtual(interpreter)
+
+        val port = switch.newPort()
+        port.close()
+
+        assertThrows<IllegalStateException> {
+            port.connect(sink)
+        }
+    }
+
+    private class Source(interpreter: SimResourceInterpreter) : SimNetworkPort() {
+        val consumer = spyk(SimWorkConsumer(Double.POSITIVE_INFINITY, utilization = 0.8))
+
+        public override fun createConsumer(): SimResourceConsumer = consumer
+
+        override val provider: SimResourceProvider = SimResourceSource(0.0, interpreter)
+    }
+}
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