added workflow for testing a broker in container

.github/workflows/mqttClientTest.yml

@@ -0,0 +1,51 @@
+name: Polypheny-DB MQTT Client Test
+
+on:
+    push: { branches: mqtt-interface }
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        name: MQTT Client Tests (Java 17)
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v2
+            -   name: Set up JDK
+                uses: actions/setup-java@v1
+                with:
+                    java-version: 17
+            -   name: Set env variable
+                run: |
+                    echo "POLYPHENY_HOME=$GITHUB_WORKSPACE" >> $GITHUB_ENV
+            -   name: Create folders for certs
+                run: |
+                    mkdir $POLYPHENY_HOME/.polypheny
+                    mkdir $POLYPHENY_HOME/.polypheny/certs
+
+            -   name: Start Mosquitto broker in docker container
+                uses: namoshek/mosquitto-github-action@v1
+                with:
+                    version: '5'
+                    ports: '1883:1883'
+                    container-name: 'mqttBroker'
+
+            -   name: Assemble
+                uses: nick-invision/retry@v2
+                with:
+                    max_attempts: 2
+                    timeout_minutes: 60
+                    command: ./gradlew assemble
+
+            - name: Build Plugins
+              uses: nick-invision/retry@v2
+              with:
+                  max_attempts: 1
+                  timeout_minutes: 60
+                  command: ./gradlew assemblePlugins
+
+            -   name: Execute MQTT client tests
+                uses: nick-invision/retry@v2
+                with:
+                    max_attempts: 1
+                    timeout_minutes: 30
+                    command: ./gradlew mqttTests

plugins/mqtt-stream/build.gradle

@@ -60,6 +60,16 @@ sourceSets {
     }
 }
 
+task mqttTests(type: Test) {
+    description = 'Runs MQTT client tests.'
+    group = 'verification'
+    useJUnit {
+        includeCategories 'org.polypheny.db.mqtt.MqttClientBrokerTest'
+    }
+    shouldRunAfter(tasks.named('test'))
+}
+mqttTests.dependsOn(testClasses)
+
 compileJava {
     dependsOn(":config:processResources")
     dependsOn(":core:processResources")

plugins/mqtt-stream/src/test/java/org/polypheny/db/mqtt/MqttClientBrokerTest.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright 2019-2023 The Polypheny 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 org.polypheny.db.mqtt;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.polypheny.db.TestHelper;
+import org.polypheny.db.iface.QueryInterface;
+import org.polypheny.db.iface.QueryInterfaceManager;
+import org.polypheny.db.mqtt.MqttStreamPlugin.MqttStreamClient;
+import org.polypheny.db.transaction.Transaction;
+import org.polypheny.db.transaction.TransactionManager;
+
+public class MqttClientBrokerTest {
+
+
+    static TransactionManager transactionManager;
+    static Transaction transaction;
+    static Map<String, String> initialSettings = new HashMap<>();
+    static Map<String, String> changedSettings = new HashMap<>();
+    static MqttStreamClient client;
+
+    @BeforeClass
+    public static void init() {
+        TestHelper testHelper = TestHelper.getInstance();
+        transactionManager = testHelper.getTransactionManager();
+        transaction = testHelper.getTransaction();
+        initialSettings.clear();
+        initialSettings.put( "brokerAddress", "1883" );
+        initialSettings.put( "brokerPort", "1883" );
+        initialSettings.put( "commonCollectionName", "testCollection" );
+        initialSettings.put( "commonCollection", "true" );
+        initialSettings.put( "namespace", "testNamespace" );
+        initialSettings.put( "namespaceType", "DOCUMENT" );
+        initialSettings.put( "topics", "button" );
+        initialSettings.put( "Tsl/SslConnection", "false" );
+        initialSettings.put( "filterQuery", "" );
+
+        QueryInterface iface = QueryInterfaceManager.getInstance().getQueryInterface( "mqtt" );
+
+        client = new MqttStreamClient(
+                transactionManager,
+                null,
+                iface.getQueryInterfaceId(),
+                iface.getUniqueName(),
+                initialSettings );
+
+    }
+
+/*
+    @Before
+    public void resetSettings() {
+        initialSettings.clear();
+        initialSettings.put( "brokerAddress", "1883" );
+        initialSettings.put( "brokerPort", "1883" );
+        initialSettings.put( "commonCollectionName", "testCollection" );
+        initialSettings.put( "commonCollection", "true" );
+        initialSettings.put( "namespace", "testNamespace" );
+        initialSettings.put( "namespaceType", "DOCUMENT" );
+        initialSettings.put( "topics", "" );
+        initialSettings.put( "Tsl/SslConnection", "false" );
+        initialSettings.put( "filterQuery", "" );
+
+        QueryInterface iface = QueryInterfaceManager.getInstance().getQueryInterface( "mqtt" );
+
+        client = new MqttStreamClient(
+                transactionManager,
+                null,
+                iface.getQueryInterfaceId(),
+                iface.getUniqueName(),
+                initialSettings );
+
+        changedSettings.clear();
+        changedSettings.put( "commonCollectionName", "testCollection" );
+        changedSettings.put( "commonCollection", "true" );
+        changedSettings.put( "namespace", "testNamespace" );
+        changedSettings.put( "topics", "" );
+        changedSettings.put( "filterQuery", "" );
+    }
+    */
+
+    @Test
+    public void connectionTest() {
+        Map<String, AtomicLong> topicsMap = client.getTopicsMap();
+        assertEquals( 1, topicsMap.size() );
+        assertEquals( 0, topicsMap.get( "button" ) );
+    }
+
+
+
+
+}