Bael 3512-difference between logical and bitwise & (eugenp#8203)

sumit-bhawsar · sjmillington · commit 655c5458050a · 2019-12-24T17:03:31.000Z
* BAEL-3512 unit tests for Bitwise and Logical AND operators

* BAEL-3512 readme.md is updated and added new tests for bitwise &amp; with booleans

* BAEL-3512 updated variables names to more meaningful names

* BAEL-3512 added example for short circuit
diff --git a/core-java-modules/core-java-lang-operators/README.md b/core-java-modules/core-java-lang-operators/README.md
@@ -11,4 +11,5 @@ This module contains articles about Java operators
 - [Java Compound Operators](https://www.baeldung.com/java-compound-operators)
 - [The XOR Operator in Java](https://www.baeldung.com/java-xor-operator)
 - [Java Bitwise Operators](https://www.baeldung.com/java-bitwise-operators)
+- [Bitwise & vs Logical && Operators](https://www.baeldung.com/bitwise-vs-logical-operators/)
 
diff --git a/core-java-modules/core-java-lang-operators/src/test/java/com/baeldung/andoperators/BitwiseAndLogicalANDOperatorsUnitTest.java b/core-java-modules/core-java-lang-operators/src/test/java/com/baeldung/andoperators/BitwiseAndLogicalANDOperatorsUnitTest.java
@@ -0,0 +1,71 @@
+package com.baeldung.andoperators;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.Assert.*;
+
+public class BitwiseAndLogicalANDOperatorsUnitTest {
+
+    @Test
+    public void givenTwoTrueBooleans_whenBitwiseAndOperator_thenTrue() {
+        boolean trueBool = true;
+        boolean anotherTrueBool = true;
+        boolean trueANDTrue = trueBool & anotherTrueBool;
+        assertTrue(trueANDTrue);
+    }
+
+    @Test
+    public void givenOneFalseAndOneTrueBooleans_whenBitwiseAndOperator_thenFalse() {
+        boolean trueBool = true;
+        boolean falseBool = false;
+        boolean trueANDFalse = trueBool & falseBool;
+        assertFalse(trueANDFalse);
+    }
+
+    @Test
+    public void givenTwoFalseBooleans_whenBitwiseAndOperator_thenFalse() {
+        boolean falseBool = false;
+        boolean anotherFalseBool = false;
+        boolean falseANDFalse = falseBool & anotherFalseBool;
+        assertFalse(falseANDFalse);
+    }
+
+    @Test
+    public void givenTwoIntegers_whenBitwiseAndOperator_thenNewDecimalNumber() {
+        int six = 6;
+        int five = 5;
+        int shouldBeFour = six & five;
+        assertEquals(4, shouldBeFour);
+    }
+
+    @Test
+    public void givenTwoTrueBooleans_whenLogicalAndOperator_thenTrue() {
+        boolean trueBool = true;
+        boolean anotherTrueBool = true;
+        boolean trueANDTrue = trueBool && anotherTrueBool;
+        assertTrue(trueANDTrue);
+    }
+
+    @Test
+    public void givenOneFalseAndOneTrueBooleans_whenLogicalAndOperator_thenFalse() {
+        boolean trueBool = true;
+        boolean falseBool = false;
+        boolean trueANDFalse = trueBool && falseBool;
+        assertFalse(trueANDFalse);
+    }
+
+    @Test
+    public void givenTwoFalseBooleans_whenLogicalAndOperator_thenFalse() {
+        boolean falseBool = false;
+        boolean anotherFalseBool = false;
+        boolean falseANDFalse = falseBool && anotherFalseBool;
+        assertFalse(falseANDFalse);
+    }
+
+    @Test
+    public void givenTwoFalseExpressions_whenLogicalAndOperator_thenShortCircuitFalse() {
+        boolean shortCircuitResult = (2<1) && (4<5);
+        assertFalse(shortCircuitResult);
+    }
+
+}
