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JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck.

There is a newer version: 4.13.2
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package org.junit.rules;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.junit.runner.Description;
import org.junit.runners.model.Statement;

/**
 * The RuleChain rule allows ordering of TestRules. You create a
 * {@code RuleChain} with {@link #outerRule(TestRule)} and subsequent calls of
 * {@link #around(TestRule)}:
 *
 * 
 * public class UseRuleChain {
 * 	@Rule
 * 	public RuleChain chain= RuleChain
 * 	                       .outerRule(new LoggingRule("outer rule"))
 * 	                       .around(new LoggingRule("middle rule"))
 * 	                       .around(new LoggingRule("inner rule"));
 *
 * 	@Test
 * 	public void example() {
 * 		assertTrue(true);
 *     }
 * }
 * 
* * writes the log * *
 * starting outer rule
 * starting middle rule
 * starting inner rule
 * finished inner rule
 * finished middle rule
 * finished outer rule
 * 
* * {@code RuleChain} cannot be used to define the order of existing rules. * For example in the below snippet the LoggingRule {@code middle} would be * executed outside as well as inside the {@code RuleChain}: * *
 * @Rule
 * public LoggingRule middle = new LoggingRule("middle rule");
 * 
 * @Rule
 * public RuleChain chain = RuleChain
 *                          .outerRule(new LoggingRule("outer rule"))
 *                          .around(middle)
 *                          .around(new LoggingRule("inner rule"));
 * 
* * @deprecated Since 4.13 ordering of rules can be naturally specified with an annotation attribute. * @see org.junit.Rule#order() * @see org.junit.ClassRule#order() * @since 4.10 */ @Deprecated public class RuleChain implements TestRule { private static final RuleChain EMPTY_CHAIN = new RuleChain( Collections.emptyList()); private List rulesStartingWithInnerMost; /** * Returns a {@code RuleChain} without a {@link TestRule}. This method may * be the starting point of a {@code RuleChain}. * * @return a {@code RuleChain} without a {@link TestRule}. */ public static RuleChain emptyRuleChain() { return EMPTY_CHAIN; } /** * Returns a {@code RuleChain} with a single {@link TestRule}. This method * is the usual starting point of a {@code RuleChain}. * * @param outerRule the outer rule of the {@code RuleChain}. * @return a {@code RuleChain} with a single {@link TestRule}. */ public static RuleChain outerRule(TestRule outerRule) { return emptyRuleChain().around(outerRule); } private RuleChain(List rules) { this.rulesStartingWithInnerMost = rules; } /** * Create a new {@code RuleChain}, which encloses the given {@link TestRule} with * the rules of the current {@code RuleChain}. * * @param enclosedRule the rule to enclose; must not be {@code null}. * @return a new {@code RuleChain}. * @throws NullPointerException if the argument {@code enclosedRule} is {@code null} */ public RuleChain around(TestRule enclosedRule) { if (enclosedRule == null) { throw new NullPointerException("The enclosed rule must not be null"); } List rulesOfNewChain = new ArrayList(); rulesOfNewChain.add(enclosedRule); rulesOfNewChain.addAll(rulesStartingWithInnerMost); return new RuleChain(rulesOfNewChain); } /** * {@inheritDoc} */ public Statement apply(Statement base, Description description) { return new RunRules(base, rulesStartingWithInnerMost, description); } }




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