implement junit tests

src/test/java/ConstructorCallTest.java

@@ -0,0 +1,43 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.antlr.v4.runtime.tree.ParseTree;
+import org.junit.jupiter.api.Test;
+
+import de.hsrm.compiler.Klang.ContextAnalysis;
+
+public class ConstructorCallTest {
+
+    @Test
+    void structNotDefined() {
+        ParseTree tree = Helper.prepareParser("struct bar { a: int; } function foo(): bar { return create schwurbel(1); } foo();");
+        var funcs = Helper.getFuncs(tree);
+        var structs = Helper.getStructs(tree);
+        ContextAnalysis ctxAnal = new ContextAnalysis(funcs, structs);
+        
+        Exception e = assertThrows(RuntimeException.class, () -> ctxAnal.visit(tree));
+        assertEquals("Error in line 1:52 Struct with name \"schwurbel\" not defined.", e.getMessage());
+    }
+
+    @Test
+    void numConstructorParameterMissmatch() {
+        ParseTree tree = Helper.prepareParser("struct bar { a: int; } function foo(): bar { return create bar(1, false); } foo();");
+        var funcs = Helper.getFuncs(tree);
+        var structs = Helper.getStructs(tree);
+        ContextAnalysis ctxAnal = new ContextAnalysis(funcs, structs);
+        
+        Exception e = assertThrows(RuntimeException.class, () -> ctxAnal.visit(tree));
+        assertEquals("Error in line 1:52 Struct \"bar\" defined 1 fields, but got 2 constructor parameters.", e.getMessage());
+    }
+
+    @Test
+    void constructorParameterTypeMismatch() {
+        ParseTree tree = Helper.prepareParser("struct bar { a: int; } function foo(): bar { return create bar(false); } foo();");
+        var funcs = Helper.getFuncs(tree);
+        var structs = Helper.getStructs(tree);
+        ContextAnalysis ctxAnal = new ContextAnalysis(funcs, structs);
+        
+        Exception e = assertThrows(RuntimeException.class, () -> ctxAnal.visit(tree));
+        assertEquals("Error in line 1:63 argument 0 Type missmatch: cannot combine bool and int", e.getMessage());
+    }
+}