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JUnit is a regression testing framework written by Erich Gamma and Kent Beck. It is used by the developer who implements unit tests in Java.

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package org.junit.runners.model;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

import org.junit.runners.BlockJUnit4ClassRunner;

/**
 * Represents a field on a test class (currently used only for Rules in
 * {@link BlockJUnit4ClassRunner}, but custom runners can make other uses)
 */
public class FrameworkField extends FrameworkMember {
	private final Field fField;

	FrameworkField(Field field) {
		fField= field;
	}

	@Override
	public Annotation[] getAnnotations() {
		return fField.getAnnotations();
	}

	@Override
	public boolean isShadowedBy(FrameworkField otherMember) {
		return otherMember.getField().getName().equals(getField().getName());
	}

	/**
	 * @return the underlying java Field
	 */
	public Field getField() {
		return fField;
	}

	/**
	 * Attempts to retrieve the value of this field on {@code target}
	 */
	public Object get(Object target) throws IllegalArgumentException, IllegalAccessException {
		return fField.get(target);
	}
}