JUnit 4.13.2 Source Code Files

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org/junit/runners/RuleContainer.java

package org.junit.runners;

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

import org.junit.Rule;
import org.junit.rules.MethodRule;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.Statement;

/**
 * Data structure for ordering of {@link TestRule}/{@link MethodRule} instances.
 *
 * @since 4.13
 */
class RuleContainer {
    private final IdentityHashMap<Object, Integer> orderValues = new IdentityHashMap<Object, Integer>();
    private final List<TestRule> testRules = new ArrayList<TestRule>();
    private final List<MethodRule> methodRules = new ArrayList<MethodRule>();

    /**
     * Sets order value for the specified rule.
     */
    public void setOrder(Object rule, int order) {
        orderValues.put(rule, order);
    }

    public void add(MethodRule methodRule) {
        methodRules.add(methodRule);
    }

    public void add(TestRule testRule) {
        testRules.add(testRule);
    }

    static final Comparator<RuleEntry> ENTRY_COMPARATOR = new Comparator<RuleEntry>() {
        public int compare(RuleEntry o1, RuleEntry o2) {
            int result = compareInt(o1.order, o2.order);
            return result != 0 ? result : o1.type - o2.type;
        }

        private int compareInt(int a, int b) {
            return (a < b) ? 1 : (a == b ? 0 : -1);
        }
    };

    /**
     * Returns entries in the order how they should be applied, i.e. inner-to-outer.
     */
    private List<RuleEntry> getSortedEntries() {
        List<RuleEntry> ruleEntries = new ArrayList<RuleEntry>(
                methodRules.size() + testRules.size());
        for (MethodRule rule : methodRules) {
            ruleEntries.add(new RuleEntry(rule, RuleEntry.TYPE_METHOD_RULE, orderValues.get(rule)));
        }
        for (TestRule rule : testRules) {
            ruleEntries.add(new RuleEntry(rule, RuleEntry.TYPE_TEST_RULE, orderValues.get(rule)));
        }
        Collections.sort(ruleEntries, ENTRY_COMPARATOR);
        return ruleEntries;
    }

    /**
     * Applies all the rules ordered accordingly to the specified {@code statement}.
     */
    public Statement apply(FrameworkMethod method, Description description, Object target,
            Statement statement) {
        if (methodRules.isEmpty() && testRules.isEmpty()) {
            return statement;
        }
        Statement result = statement;
        for (RuleEntry ruleEntry : getSortedEntries()) {
            if (ruleEntry.type == RuleEntry.TYPE_TEST_RULE) {
                result = ((TestRule) ruleEntry.rule).apply(result, description);
            } else {
                result = ((MethodRule) ruleEntry.rule).apply(result, method, target);
            }
        }
        return result;
    }

    /**
     * Returns rule instances in the order how they should be applied, i.e. inner-to-outer.
     * VisibleForTesting
     */
    List<Object> getSortedRules() {
        List<Object> result = new ArrayList<Object>();
        for (RuleEntry entry : getSortedEntries()) {
            result.add(entry.rule);
        }
        return result;
    }

    static class RuleEntry {
        static final int TYPE_TEST_RULE = 1;
        static final int TYPE_METHOD_RULE = 0;

        final Object rule;
        final int type;
        final int order;

        RuleEntry(Object rule, int type, Integer order) {
            this.rule = rule;
            this.type = type;
            this.order = order != null ? order.intValue() : Rule.DEFAULT_ORDER;
        }
    }
}

org/junit/runners/RuleContainer.java

 

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File name: junit-4.13.2-sources.jar
File size: 234540 bytes
Release date: 2021-02-13
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