random utils

commons-core/pom.xml

@@ -23,6 +23,7 @@
         <guava.version>28.1-jre</guava.version>
         <reactor.version>3.2.12.RELEASE</reactor.version>
         <slf4j.version>1.7.28</slf4j.version>
+        <easy-random.version>4.0.0</easy-random.version>
     </properties>
 
 
@@ -95,6 +96,12 @@
             <version>${guava.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.jeasy</groupId>
+            <artifactId>easy-random-core</artifactId>
+            <version>${easy-random.version}</version>
+        </dependency>
+
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>

commons-core/src/main/kotlin/ru/sokomishalov/commons/core/random/RandomUtils.kt

@@ -0,0 +1,35 @@
+@file:Suppress("unused", "RemoveExplicitTypeArguments")
+
+package ru.sokomishalov.commons.core.random
+
+import org.apache.commons.lang3.RandomStringUtils.randomAlphanumeric
+import org.jeasy.random.EasyRandom
+import org.jeasy.random.EasyRandomParameters
+import java.nio.charset.StandardCharsets.UTF_8
+
+/**
+ * @author sokomishalov
+ */
+val EASY_RANDOM_PARAMS: EasyRandomParameters = EasyRandomParameters()
+        .seed((0L..1000L).random())
+        .objectPoolSize(100)
+        .randomizationDepth(3)
+        .charset(UTF_8)
+        .stringLengthRange(5, 20)
+        .collectionSizeRange(0, 10)
+        .scanClasspathForConcreteTypes(true)
+        .overrideDefaultInitialization(false)
+        .ignoreRandomizationErrors(true)
+
+
+inline fun <reified T> randomPojo(): T {
+    return EasyRandom(EASY_RANDOM_PARAMS).nextObject(T::class.java)
+}
+
+inline fun <reified T> randomPojoSequence() = sequence<T> {
+    while (true) {
+        yield(randomPojo<T>())
+    }
+}
+
+fun randomString(length: Int = 20): String = randomAlphanumeric(length)