Merge pull request #15692 from hangga/securerandom-positive-long

BAEL-7491 - Generating Unique Positive Long using SecureRandom in Java

core-java-modules/core-java-numbers-7/src/test/java/com/baeldung/securerandompositivelong/SecureRandomPositiveLongUnitTest.java

@@ -0,0 +1,18 @@
+package com.baeldung.securerandompositivelong;
+
+import org.junit.jupiter.api.Test;
+
+import java.security.SecureRandom;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class SecureRandomPositiveLongUnitTest {
+
+    @Test
+    void whenGenerateRandomPositiveLong_thenGetPositiveValue() {
+        SecureRandom secureRandom = new SecureRandom();
+        long randomPositiveLong = Math.abs(secureRandom.nextLong());
+
+        assertThat(randomPositiveLong).isNotNegative();
+    }
+}