Adding source code for the tutorial tracked under BAEL-2759 (#6533)

tensorflow-java/src/test/java/org/baeldung/tensorflow/TensorflowGraphUnitTest.java

@@ -0,0 +1,21 @@
+package org.baeldung.tensorflow;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.Test;
+import org.tensorflow.Graph;
+
+public class TensorflowGraphUnitTest {
+	
+	@Test
+	public void givenTensorflowGraphWhenRunInSessionReturnsExpectedResult() {
+		
+		Graph graph = TensorflowGraph.createGraph();
+		Object result = TensorflowGraph.runGraph(graph, 3.0, 6.0);
+		assertEquals(21.0, result);
+		System.out.println(result);
+		graph.close();
+		
+	}
+
+}