Fix: EMADL2CPP/issues/1 + testcase

src/main/java/de/monticore/lang/monticar/generator/cpp/converter/ComponentConverterMethodGeneration.java

@@ -41,6 +41,7 @@ import de.monticore.lang.monticar.ts.references.MCTypeReference;
 import de.se_rwth.commons.logging.Log;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 
 /**
@@ -106,7 +107,7 @@ public class ComponentConverterMethodGeneration {
         for (currentGenerationIndex = 0; currentGenerationIndex < mathStatementsSymbol.getMathExpressionSymbols().size(); ++currentGenerationIndex) {
             int beginIndex = currentGenerationIndex;
             MathExpressionSymbol mathExpressionSymbol = mathStatementsSymbol.getMathExpressionSymbols().get(currentGenerationIndex);
-            if (!visitedMathExpressionSymbols.contains(mathExpressionSymbol)) {
+            if (!containsExactObject(visitedMathExpressionSymbols, mathExpressionSymbol)) {
                 if (generatorCPP.useAlgebraicOptimizations()) {
                     List<MathExpressionSymbol> precedingExpressions = new ArrayList<>();
                     for (int i = 0; i < counter; ++i)
@@ -124,6 +125,16 @@ public class ComponentConverterMethodGeneration {
             removeUselessVariableDefinitions(method);
     }
 
+    private static boolean containsExactObject(Collection collection, Object obj){
+        for(Object other : collection){
+            //equals is not used on purpose!
+            //the jvm object id must be the same!
+            if(other == obj) return true;
+        }
+
+        return false;
+    }
+
     private static void removeUselessVariableDefinitions(Method method) {
         List<Instruction> instructionsToRemove = new ArrayList<>();
         for (Instruction instruction1 : method.getInstructions()) {

src/test/java/de/monticore/lang/monticar/generator/cpp/AutomaticStreamTestGenerationTest.java

@@ -327,4 +327,18 @@ public class AutomaticStreamTestGenerationTest extends AbstractSymtabTest {
 
     }
     //Maybe add test that executes all stream tests in the resource dir(will take longer than an hour to execute) later
+
+    @Test
+    public void testMultipleAssignments() throws Exception {
+        AutomaticStreamTestGenerator generator = new AutomaticStreamTestGenerator();
+        String fullComponentInstanceName = "test.multipleAssignments";
+        String modelDir = "src/test/resources/streamtests/multipleAssignmentsBase";
+        generator.generateTests(fullComponentInstanceName,
+                modelDir, "N:/target/generated-sources-cpp/streamtest/multipleAssignments/", "1", 1);
+
+        testGenCPPFilesAndExec("./target/generated-sources-cpp/streamtest", "/multipleAssignments",
+                modelDir, "./target/generated-sources-cpp/streamtest/multipleAssignments",
+                fullComponentInstanceName,
+                "test.MultipleAssignmentsTest");
+    }
 }