From a71d4885efcf01850bc236d3e9f77ab3f44b48aa Mon Sep 17 00:00:00 2001
From: Fabian Mastenbroek <mail.fabianm@gmail.com>
Date: Fri, 8 Jan 2021 18:18:43 +0100
Subject: Convert to pull-based workload model

This change converts the low-level workload model to be pull-based. This
reduces the overhead that we experienced with our previous co-routine
based approach.
---
 .../kotlin/org/opendc/utils/TimerSchedulerTest.kt  | 147 +++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 simulator/opendc-utils/src/test/kotlin/org/opendc/utils/TimerSchedulerTest.kt

(limited to 'simulator/opendc-utils/src/test/kotlin/org')

diff --git a/simulator/opendc-utils/src/test/kotlin/org/opendc/utils/TimerSchedulerTest.kt b/simulator/opendc-utils/src/test/kotlin/org/opendc/utils/TimerSchedulerTest.kt
new file mode 100644
index 00000000..3a4acc90
--- /dev/null
+++ b/simulator/opendc-utils/src/test/kotlin/org/opendc/utils/TimerSchedulerTest.kt
@@ -0,0 +1,147 @@
+/*
+ * 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.utils
+
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runBlockingTest
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import org.opendc.simulator.utils.DelayControllerClockAdapter
+
+/**
+ * A test suite for the [TimerScheduler] class.
+ */
+@OptIn(ExperimentalCoroutinesApi::class)
+internal class TimerSchedulerTest {
+    @Test
+    fun testBasicTimer() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.startSingleTimer(0, 1000) {
+                scheduler.close()
+                assertEquals(1000, clock.millis())
+            }
+        }
+    }
+
+    @Test
+    fun testCancelNonExisting() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.cancel(1)
+            scheduler.close()
+        }
+    }
+
+    @Test
+    fun testCancelExisting() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.startSingleTimer(0, 1000) {
+                assertFalse(false)
+            }
+
+            scheduler.startSingleTimer(1, 100) {
+                scheduler.cancel(0)
+                scheduler.close()
+
+                assertEquals(100, clock.millis())
+            }
+        }
+    }
+
+    @Test
+    fun testCancelAll() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.startSingleTimer(0, 1000) {
+                assertFalse(false)
+            }
+
+            scheduler.startSingleTimer(1, 100) {
+                assertFalse(false)
+            }
+
+            scheduler.close()
+        }
+    }
+
+    @Test
+    fun testOverride() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.startSingleTimer(0, 1000) {
+                assertFalse(false)
+            }
+
+            scheduler.startSingleTimer(0, 200) {
+                scheduler.close()
+
+                assertEquals(200, clock.millis())
+            }
+        }
+    }
+
+    @Test
+    fun testStopped() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            scheduler.close()
+
+            assertThrows<IllegalStateException> {
+                scheduler.startSingleTimer(1, 100) {
+                    assertFalse(false)
+                }
+            }
+        }
+    }
+
+    @Test
+    fun testNegativeDelay() {
+        runBlockingTest {
+            val clock = DelayControllerClockAdapter(this)
+            val scheduler = TimerScheduler<Int>(this, clock)
+
+            assertThrows<IllegalArgumentException> {
+                scheduler.startSingleTimer(1, -1) {
+                    assertFalse(false)
+                }
+            }
+
+            scheduler.close()
+        }
+    }
+}
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