Merge pull request #8485 from vikasrajput6035/BAEL-3504

BAEL-3504: Article - what causes invocation-target-exception : done

core-java-modules/core-java-reflection/src/main/java/com/baeldung/reflection/exception/invocationtarget/InvocationTargetExample.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.exception.invocationtarget;
+
+public class InvocationTargetExample {
+    public int divideByZeroExample() {
+        return 1 / 0;
+    }
+}

core-java-modules/core-java-reflection/src/test/java/com/baeldung/reflection/exception/invocationtarget/InvocationTargetUnitTest.java

@@ -0,0 +1,23 @@
+package com.baeldung.reflection.exception.invocationtarget;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.junit.jupiter.api.Test;
+
+public class InvocationTargetUnitTest {
+
+    @Test
+    public void whenCallingMethodThrowsException_thenAssertCauseOfInvocationTargetException() throws Exception {
+
+        InvocationTargetExample targetExample = new InvocationTargetExample();
+        Method method = InvocationTargetExample.class.getMethod("divideByZeroExample");
+        
+        Exception exception = assertThrows(InvocationTargetException.class, () -> method.invoke(targetExample));
+        
+        assertEquals(ArithmeticException.class, exception.getCause().getClass());
+    }
+}