1 package org.junit.rules; 2 3 import org.junit.Rule; 4 import org.junit.runners.model.FrameworkMethod; 5 import org.junit.runners.model.Statement; 6 7 /** 8 * A MethodRule is an alteration in how a test method is run and reported. 9 * Multiple {@link MethodRule}s can be applied to a test method. The 10 * {@link Statement} that executes the method is passed to each annotated 11 * {@link Rule} in turn, and each may return a substitute or modified 12 * {@link Statement}, which is passed to the next {@link Rule}, if any. For 13 * an example of how this can be useful, see {@link TestWatchman}. 14 * 15 * <p>Note that {@link MethodRule} has been replaced by {@link TestRule}, 16 * which has the added benefit of supporting class rules. 17 * 18 * @since 4.7 19 */ 20 public interface MethodRule { 21 /** 22 * Modifies the method-running {@link Statement} to implement an additional 23 * test-running rule. 24 * 25 * @param base The {@link Statement} to be modified 26 * @param method The method to be run 27 * @param target The object on which the method will be run. 28 * @return a new statement, which may be the same as {@code base}, 29 * a wrapper around {@code base}, or a completely new Statement. 30 */ apply(Statement base, FrameworkMethod method, Object target)31 Statement apply(Statement base, FrameworkMethod method, Object target); 32 } 33