Bael 3082 (#7446)

* added example code for BAEL-3082

* added another test case, refactored method names

* moved to basics module

testing-modules/junit-5-basics/src/main/java/com/baeldung/failure_vs_error/SimpleCalculator.java

@@ -0,0 +1,15 @@
+package com.baeldung.failure_vs_error;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-07-17
+ */
+public class SimpleCalculator {
+
+    public static double divideNumbers(double dividend, double divisor) {
+        if (divisor == 0) {
+            throw new ArithmeticException("Division by zero!");
+        }
+        return dividend / divisor;
+    }
+}

testing-modules/junit-5-basics/src/test/java/com/baeldung/failure_vs_error/SimpleCalculatorUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.failure_vs_error;
+
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-07-17
+ */
+class SimpleCalculatorUnitTest {
+
+    @Test
+    void whenDivideByValidNumber_thenAssertCorrectResult() {
+        double result = SimpleCalculator.divideNumbers(6, 3);
+        assertEquals(2, result);
+    }
+
+    @Test
+    @Disabled("test is expected to fail, disabled so that CI build still goes through")
+    void whenDivideNumbers_thenExpectWrongResult() {
+        double result = SimpleCalculator.divideNumbers(6, 3);
+        assertEquals(15, result);
+    }
+
+    @Test
+    @Disabled("test is expected to raise an error, disabled so that CI build still goes through")
+    void whenDivideByZero_thenThrowsException() {
+        SimpleCalculator.divideNumbers(10, 0);
+    }
+
+    @Test
+    void whenDivideByZero_thenAssertException(){
+        assertThrows(ArithmeticException.class, () -> SimpleCalculator.divideNumbers(10, 0));
+    }
+
+}