working on negative Tests

src/test/java/NegativeTests.java

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+import de.maishai.Compiler;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+public class NegativeTests {
+
+    @Test
+    public void AddressingFieldWithoutThis() {
+        try {
+            Compiler.generateByteCodeFilesFromFiles(List.of("src/test/testFiles/Negative/AddressingFieldWithoutThis.java"));
+            Assertions.fail();
+        } catch (Exception e) {
+            Assertions.assertTrue(true);
+        }
+    }
+
+    @Test
+    public void PublicMissingInClass() {
+        Compiler.generateByteCodeFilesFromFiles(List.of("src/test/testFiles/Negative/PublicMissingInClass.java"));
+    }
+}

src/test/testFiles/Negative/AddressingFieldWithoutThis.java

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+public class AddressingFieldWithoutThis {
+    int x;
+    public AddressingFieldWithoutThis() {
+        x = 5;
+    }
+}

src/test/testFiles/Negative/PublicMissingInClass.java

@@ -0,0 +1,2 @@
+class PublicMissingInClass {
+}