java-commons/src/test/java/de/nclazz/commons/reflection/ReflectionUtilsTest.java

package de.nclazz.commons.reflection;

import org.junit.jupiter.api.Test;

import java.lang.reflect.Field;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.*;

class ReflectionUtilsTest {

    static class BaseClass {
        private int baseFieldInt;
        private float baseFieldFloat;
        private String baseField;
    }

    static class InheritedClass extends BaseClass {
        private String inheritField;
    }

    @Test
    void findDeclaredFieldsRecursively() {
        Set<Field> fields = ReflectionUtils.getDeclaredFieldRecursively(InheritedClass.class);
        assertEquals(4, fields.size());
    }

    @Test
    void testDeclaredFieldsPredicate() {
        Set<Field> fields = ReflectionUtils.getDeclaredFieldRecursively(InheritedClass.class, field -> field.getType() == String.class);
        assertEquals(2, fields.size());
    }

}