Adding JUnit to project and first test

Signed-off-by: Alfredo Gutierrez <[email protected]>

simulator/build.gradle.kts

@@ -31,3 +31,10 @@ mainModuleInfo {
     annotationProcessor("com.google.auto.service.processor")
     runtimeOnly("com.swirlds.config.impl")
 }
+
+testModuleInfo {
+    requires("org.junit.jupiter.api")
+    requires("org.mockito")
+    requires("org.mockito.junit.jupiter")
+    requiresStatic("com.github.spotbugs.annotations")
+}

simulator/src/main/java/com/hedera/block/simulator/BlockStreamSimulator.java

@@ -29,6 +29,7 @@ public class BlockStreamSimulator {
 
     Configuration configuration;
     BlockStreamManager blockStreamManager;
+    boolean isRunning = false;
 
     @Inject
     public BlockStreamSimulator(
@@ -55,9 +56,13 @@ public void start() {
         // use blockStreamManager to get block stream
 
         // use PublishStreamGrpcClient to stream it to the block-node.
-
+        isRunning = true;
         LOGGER.log(Logger.Level.INFO, "Block Stream Simulator has started");
     }
 
+    public boolean isRunning() {
+        return isRunning;
+    }
+
     public void stop() {}
 }

simulator/src/test/java/com/hedera/block/simulator/BlockStreamSimulatorTest.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2024 Hedera Hashgraph, LLC
+ *
+ * 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 com.hedera.block.simulator;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import com.hedera.block.simulator.generator.BlockStreamManager;
+import com.swirlds.config.api.Configuration;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class BlockStreamSimulatorTest {
+
+    @Mock private Configuration configuration;
+
+    @Mock private BlockStreamManager blockStreamManager;
+
+    @InjectMocks private BlockStreamSimulator blockStreamSimulator;
+
+    @BeforeEach
+    void setUp() {
+        blockStreamSimulator = new BlockStreamSimulator(configuration, blockStreamManager);
+    }
+
+    @AfterEach
+    void tearDown() {
+        blockStreamSimulator.stop();
+    }
+
+    @Test
+    void start_logsStartedMessage() {
+        blockStreamSimulator.start();
+        assertTrue(blockStreamSimulator.isRunning());
+    }
+
+    @Test
+    void stop_doesNotThrowException() {
+        assertDoesNotThrow(() -> blockStreamSimulator.stop());
+    }
+}