DataGen: Data Generation

Generating data is useful for testing. DataGen can be used to generate data such as random names, emails, numeric values or dates, and can ensure uniqueness of values.

Example

import java.util.Arrays;

import static com.aymanmadkour.datagen.DataGen.*;

public class Test {
    public static void main(String[] args) {
        RecordGen recordGen = RecordGen.builder()
                // Adding a named value "firstName", which can be used later
                // when generating email
                .add(named("firstName", concat(
                        string()
                                .length(1)
                                .characterClass(CharacterClass.UPPER_CASE)
                                .build(),
                        string()
                                .length(2)
                                .characterClass(CharacterClass.LOWER_CASE)
                                .build())))
                                
                // Adding a named value "lastName", which can be used later
                // when generating email
                .add(named("lastName", concat(
                        string()
                                .length(1)
                                .characterClass(CharacterClass.UPPER_CASE)
                                .build(),
                        string()
                                .length(2)
                                .characterClass(CharacterClass.LOWER_CASE)
                                .build())))
                                
                // Generate email from first and last names
                .add(named("email", concat(lowerCase(ref("firstName")), literal("."), lowerCase(ref("lastName")), literal("@domain.com"))))
                .add(integer(1000, 10000))
                .add(valueList("HR", "Engineering", "Sales", "Accounting"))
                .unique("email")    // Make sure email is unique
                .build();

        for (int i = 0; i < 1000; i++) {
            String[] record = recordGen.generate();
            System.out.println(Arrays.toString(record));
        }
    }
}