BAEL-1912

core-kotlin/src/test/kotlin/com/baeldung/random/RandomNumberTest.kt

@@ -0,0 +1,45 @@
+
+import org.junit.jupiter.api.Test
+import java.util.concurrent.ThreadLocalRandom
+
+class RandomNumberTest {
+
+    @Test
+    fun givenUsingJavaUtilMath_whenGeneratingRandomNumber_thenCorrect() {
+        val randomNumber = Math.random()
+        println(randomNumber)
+    }
+
+    @Test
+    fun givenUsingThreadLocalRandom_whenGeneratingRandomNumber_thenCorrect() {
+        val randomDouble = ThreadLocalRandom.current().nextDouble()
+        val randomInteger = ThreadLocalRandom.current().nextInt()
+        val randomLong = ThreadLocalRandom.current().nextLong()
+        println(randomDouble)
+        println(randomInteger)
+        println(randomLong)
+    }
+
+    @Test
+    fun givenUsingKotlinJsMath_whenGeneratingRandomNumber_thenCorrect() {
+        val randomDouble = Math.random()
+        println(randomDouble)
+    }
+
+    @Test
+    fun givenUsingKotlinNumberRange_whenGeneratingRandomNumberInGivenRange_thenCorrect() {
+        val randomInteger = (1..12).shuffled().first()
+        println(randomInteger)
+    }
+
+    @Test
+    fun givenUsingThreadLocalRandom_whenGeneratingRandomNumberInGivenRange_thenCorrect() {
+        val randomDouble = ThreadLocalRandom.current().nextDouble(1.0, 10.0)
+        val randomInteger = ThreadLocalRandom.current().nextInt(1, 10)
+        val randomLong = ThreadLocalRandom.current().nextLong(1, 10)
+        println(randomDouble)
+        println(randomInteger)
+        println(randomLong)
+    }
+
+}