com.google.gerrit.testutil.SetMatcher.java Source code

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Here is the source code for com.google.gerrit.testutil.SetMatcher.java

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// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.gerrit.testutil;

import com.google.common.collect.Sets;

import org.easymock.EasyMock;
import org.easymock.IArgumentMatcher;

import java.util.Set;

/**
 * Match for Iterables via set equals
 *
 * Converts both expected and actual parameter to a set and compares those two
 * sets via equals to determine whether or not they match.
 */
public class SetMatcher<T> implements IArgumentMatcher {
    public static <S extends Iterable<T>, T> S setEq(S expected) {
        EasyMock.reportMatcher(new SetMatcher<>(expected));
        return null;
    }

    Set<T> expected;

    public SetMatcher(Iterable<T> expected) {
        this.expected = Sets.newHashSet(expected);
    }

    @Override
    public boolean matches(Object actual) {
        if (actual instanceof Iterable<?>) {
            Set<?> actualSet = Sets.newHashSet((Iterable<?>) actual);
            return expected.equals(actualSet);
        }
        return false;
    }

    @Override
    public void appendTo(StringBuffer buffer) {
        buffer.append(expected);
    }
}