76 lines
2.6 KiB
Java
76 lines
2.6 KiB
Java
/*
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* Copyright (C) 2011 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import com.google.common.annotations.GwtIncompatible;
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import java.util.Iterator;
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import java.util.List;
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import java.util.NoSuchElementException;
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import junit.framework.TestCase;
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/**
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* Base class for {@link RangeSet} tests.
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*
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* @author Louis Wasserman
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*/
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@GwtIncompatible // TreeRangeSet
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public abstract class AbstractRangeSetTest extends TestCase {
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public static void testInvariants(RangeSet<?> rangeSet) {
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testInvariantsInternal(rangeSet);
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testInvariantsInternal(rangeSet.complement());
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}
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private static <C extends Comparable> void testInvariantsInternal(RangeSet<C> rangeSet) {
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assertEquals(rangeSet.asRanges().isEmpty(), rangeSet.isEmpty());
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assertEquals(rangeSet.asDescendingSetOfRanges().isEmpty(), rangeSet.isEmpty());
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assertEquals(!rangeSet.asRanges().iterator().hasNext(), rangeSet.isEmpty());
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assertEquals(!rangeSet.asDescendingSetOfRanges().iterator().hasNext(), rangeSet.isEmpty());
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List<Range<C>> asRanges = ImmutableList.copyOf(rangeSet.asRanges());
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// test that connected ranges are coalesced
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for (int i = 0; i + 1 < asRanges.size(); i++) {
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Range<C> range1 = asRanges.get(i);
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Range<C> range2 = asRanges.get(i + 1);
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assertFalse(range1.isConnected(range2));
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}
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// test that there are no empty ranges
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for (Range<C> range : asRanges) {
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assertFalse(range.isEmpty());
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}
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// test that the RangeSet's span is the span of all the ranges
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Iterator<Range<C>> itr = rangeSet.asRanges().iterator();
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Range<C> expectedSpan = null;
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if (itr.hasNext()) {
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expectedSpan = itr.next();
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while (itr.hasNext()) {
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expectedSpan = expectedSpan.span(itr.next());
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}
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}
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try {
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Range<C> span = rangeSet.span();
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assertEquals(expectedSpan, span);
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} catch (NoSuchElementException e) {
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assertNull(expectedSpan);
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}
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// test that asDescendingSetOfRanges is the reverse of asRanges
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assertEquals(Lists.reverse(asRanges), ImmutableList.copyOf(rangeSet.asDescendingSetOfRanges()));
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}
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}
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