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diff --git a/src/test/kotlin/net/pterodactylus/sone/freenet/wot/WebOfTrustPingerTest.kt b/src/test/kotlin/net/pterodactylus/sone/freenet/wot/WebOfTrustPingerTest.kt
new file mode 100644
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--- /dev/null
+++ b/src/test/kotlin/net/pterodactylus/sone/freenet/wot/WebOfTrustPingerTest.kt
@@ -0,0 +1,117 @@
+/**
+ * Sone - WebOfTrustPinger.kt - Copyright © 2019 David ‘Bombe’ Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.freenet.wot
+
+import com.google.common.eventbus.*
+import net.pterodactylus.sone.core.event.*
+import net.pterodactylus.sone.freenet.plugin.*
+import net.pterodactylus.sone.utils.*
+import org.hamcrest.MatcherAssert.*
+import org.hamcrest.Matchers.*
+import java.util.concurrent.atomic.*
+import kotlin.test.*
+
+/**
+ * Unit test for [WebOfTrustPinger].
+ */
+class WebOfTrustPingerTest {
+
+	private val eventBus = EventBus()
+	private val webOfTrustReachable = AtomicBoolean()
+	private val webOfTrustReacher: () -> Unit = { webOfTrustReachable.get().onFalse { throw PluginException() } }
+	private val rescheduled = AtomicBoolean()
+	private val reschedule: () -> Unit = { rescheduled.set(true) }
+	private val pinger = WebOfTrustPinger(eventBus, webOfTrustReacher, reschedule)
+
+	@Test
+	fun `pinger sends wot appeared event when run first and wot is reachable`() {
+		webOfTrustReachable.set(true)
+		val appearedReceived = AtomicBoolean()
+		eventBus.register(WebOfTrustAppearedCatcher { appearedReceived.set(true) })
+		pinger()
+		assertThat(appearedReceived.get(), equalTo(true))
+	}
+
+	@Test
+	fun `pinger reschedules when wot is reachable`() {
+		webOfTrustReachable.set(true)
+		pinger()
+		assertThat(rescheduled.get(), equalTo(true))
+	}
+
+	@Test
+	fun `pinger sends wot disappeared event when run first and wot is not reachable`() {
+		val appearedReceived = AtomicBoolean()
+		eventBus.register(WebOfTrustAppearedCatcher { appearedReceived.set(true) })
+		pinger()
+		assertThat(appearedReceived.get(), equalTo(false))
+	}
+
+	@Test
+	fun `pinger reschedules when wot is not reachable`() {
+		pinger()
+		assertThat(rescheduled.get(), equalTo(true))
+	}
+
+	@Test
+	fun `pinger sends wot disappeared event when run twice and wot is not reachable on second call`() {
+		val disappearedReceived = AtomicBoolean()
+		eventBus.register(WebOfTrustDisappearedCatcher { disappearedReceived.set(true) })
+		webOfTrustReachable.set(true)
+		pinger()
+		webOfTrustReachable.set(false)
+		pinger()
+		assertThat(disappearedReceived.get(), equalTo(true))
+	}
+
+	@Test
+	fun `pinger sends wot appeared event only once`() {
+		webOfTrustReachable.set(true)
+		val appearedReceived = AtomicBoolean()
+		eventBus.register(WebOfTrustAppearedCatcher { appearedReceived.set(true) })
+		pinger()
+		appearedReceived.set(false)
+		pinger()
+		assertThat(appearedReceived.get(), equalTo(false))
+	}
+
+	@Test
+	fun `pinger sends wot disappeared event only once`() {
+		val disappearedReceived = AtomicBoolean()
+		eventBus.register(WebOfTrustDisappearedCatcher { disappearedReceived.set(true) })
+		pinger()
+		disappearedReceived.set(false)
+		pinger()
+		assertThat(disappearedReceived.get(), equalTo(false))
+	}
+
+}
+
+private class WebOfTrustAppearedCatcher(private val received: () -> Unit) {
+	@Subscribe
+	fun webOfTrustAppeared(webOfTrustAppeared: WebOfTrustAppeared) {
+		received()
+	}
+}
+
+private class WebOfTrustDisappearedCatcher(private val received: () -> Unit) {
+	@Subscribe
+	fun webOfTrustDisappeared(webOfTrustDisappeared: WebOfTrustDisappeared) {
+		received()
+	}
+}