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‎README.md

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# instancio-github-issues
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Reproducible projects for Github Issues
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Reproducible projects for GitHub issues:
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https://github.com/instancio/instancio/issues

‎issue-213/pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.instancio.github</groupId>
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<artifactId>issue-213</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>8</java.version>
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<lombok.version>1.18.22</lombok.version>
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<commons.lang3.version>3.12.0</commons.lang3.version>
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<instancio.version>1.5.4</instancio.version>
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<junit.version>5.9.0</junit.version>
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<assertj.version>3.23.1</assertj.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>${commons.lang3.version}</version>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>${lombok.version}</version>
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</dependency>
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<dependency>
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<groupId>org.instancio</groupId>
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<artifactId>instancio-junit</artifactId>
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<version>${instancio.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>${assertj.version}</version>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.10.1</version>
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<configuration>
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<source>${java.version}</source>
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<target>${java.version}</target>
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<annotationProcessorPaths>
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<path>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>${lombok.version}</version>
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</path>
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</annotationProcessorPaths>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>3.0.0-M7</version>
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</plugin>
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</plugins>
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</build>
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</project>

‎issue-213/src/main/java/org/example/Foo.java

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package org.example;
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import lombok.Value;
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import org.apache.commons.lang3.builder.ToStringBuilder;
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import org.apache.commons.lang3.builder.ToStringStyle;
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import java.time.LocalDateTime;
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@Value
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public class Foo {
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String fooValue;
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LocalDateTime lastModified;
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LocalDateTime createdOn;
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@Override
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public String toString() {
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return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
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}
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}

‎issue-213/src/main/java/org/example/Person.java

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package org.example;
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import lombok.Value;
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import org.apache.commons.lang3.builder.ToStringBuilder;
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import org.apache.commons.lang3.builder.ToStringStyle;
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import java.time.LocalDateTime;
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import java.util.List;
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@Value
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public class Person {
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String firstName;
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String fullName;
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List<String> hobbies;
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LocalDateTime lastModified;
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LocalDateTime createdOn;
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@Override
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public String toString() {
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return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
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}
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}

‎issue-213/src/test/java/org/example/Factory.java

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package org.example;
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import org.instancio.Instancio;
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import org.instancio.Model;
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import java.time.LocalDateTime;
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import static org.instancio.Select.all;
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import static org.instancio.Select.field;
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/**
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* Constructs test object Models in a meaningful state.
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* The returned models can be customised further, if required.
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*/
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class Factory {
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/**
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* A model for classes that have 'lastModified' and 'createdOn' fields.
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* Note: passed in class must have these fields or an error will be thrown.
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*/
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static <T> Model<T> commonModel(Class<T> klass) {
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LocalDateTime lastModified = Instancio.of(LocalDateTime.class)
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.generate(all(LocalDateTime.class), gen -> gen.temporal().localDateTime().past())
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.create();
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return Instancio.of(klass)
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.set(field("lastModified"), lastModified)
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.generate(field("createdOn"), gen -> gen.temporal().localDateTime().range(LocalDateTime.MIN, lastModified))
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.toModel();
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}
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static Model<Person> personModel() {
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String firstName = Instancio.create(String.class);
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// Use the common model as a template for the Person class
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Model<Person> personModel = commonModel(Person.class);
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// Create a Person model and customise it further.
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return Instancio.of(personModel)
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.set(field("firstName"), firstName)
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.generate(field("fullName"), gen -> gen.string().prefix(firstName + " "))
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.toModel();
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}
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}

‎issue-213/src/test/java/org/example/GithubIssueSampleTest.java

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package org.example;
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import org.instancio.Instancio;
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import org.instancio.Model;
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import org.instancio.junit.InstancioExtension;
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import org.instancio.junit.Seed;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.RepeatedTest;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.instancio.Select.field;
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@ExtendWith(InstancioExtension.class)
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class GithubIssueSampleTest {
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@Test
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@DisplayName("Create Foo from model")
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void createFooFromModel() {
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Model<Foo> fooModel = Factory.commonModel(Foo.class);
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Foo foo = Instancio.create(fooModel);
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assertThat(foo.getLastModified()).isAfterOrEqualTo(foo.getCreatedOn());
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}
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@Test
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@DisplayName("Create Person from model")
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void createPersonFromModel() {
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Model<Person> personModel = Factory.personModel();
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Person person = Instancio.create(personModel);
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assertThat(person.getLastModified()).isAfterOrEqualTo(person.getCreatedOn());
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assertThat(person.getFullName()).startsWith(person.getFirstName() + " ");
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assertThat(person.getHobbies()).isNotEmpty();
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}
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@Test
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@DisplayName("Create a customised Person from model")
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void createCustomPersonFromModel() {
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Model<Person> personModel = Factory.personModel();
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// Customise the person before creating an instance from the model
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Person person = Instancio.of(personModel)
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.generate(field("hobbies"), gen -> gen.collection().with("music", "movies"))
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.create();
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assertThat(person.getLastModified()).isAfterOrEqualTo(person.getCreatedOn());
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assertThat(person.getFullName()).startsWith(person.getFirstName() + " ");
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assertThat(person.getHobbies()).contains("music", "movies");
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}
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/**
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* Since we have multiple 'Instancio.create()' calls in the Factory class,
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* to ensure they all use same the seed, we can set it using the annotation.
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*/
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@Seed(1)
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@RepeatedTest(3)
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@DisplayName("Should generate the same person data on each test run")
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void createCustomPersonFromModelWithStaticData_usingAnnotation() {
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Person person = Instancio.of(Factory.personModel())
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.generate(field("hobbies"), gen -> gen.collection().with("travel"))
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.create();
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System.out.println(person);
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}
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}

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