jFuzzyLogic/antlr_3_1_source/test/TestIntervalSet.java

/*
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 Copyright (c) 2005-2006 Terence Parr
 All rights reserved.

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 1. Redistributions of source code must retain the above copyright
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    documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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*/
package org.antlr.test;

import org.antlr.analysis.Label;
import org.antlr.misc.IntervalSet;

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

public class TestIntervalSet extends BaseTest {

    /** Public default constructor used by TestRig */
    public TestIntervalSet() {
    }

    public void testSingleElement() throws Exception {
        IntervalSet s = IntervalSet.of(99);
        String expecting = "99";
        assertEquals(s.toString(), expecting);
    }

    public void testIsolatedElements() throws Exception {
        IntervalSet s = new IntervalSet();
        s.add(1);
        s.add('z');
        s.add('\uFFF0');
        String expecting = "{1, 122, 65520}";
        assertEquals(s.toString(), expecting);
    }

    public void testMixedRangesAndElements() throws Exception {
        IntervalSet s = new IntervalSet();
        s.add(1);
        s.add('a','z');
        s.add('0','9');
        String expecting = "{1, 48..57, 97..122}";
        assertEquals(s.toString(), expecting);
    }

    public void testSimpleAnd() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(13,15);
        String expecting = "13..15";
        String result = (s.and(s2)).toString();
        assertEquals(result, expecting);
    }

    public void testRangeAndIsolatedElement() throws Exception {
        IntervalSet s = IntervalSet.of('a','z');
        IntervalSet s2 = IntervalSet.of('d');
        String expecting = "100";
        String result = (s.and(s2)).toString();
        assertEquals(result, expecting);
    }

	public void testEmptyIntersection() throws Exception {
		IntervalSet s = IntervalSet.of('a','z');
		IntervalSet s2 = IntervalSet.of('0','9');
		String expecting = "{}";
		String result = (s.and(s2)).toString();
		assertEquals(result, expecting);
	}

	public void testEmptyIntersectionSingleElements() throws Exception {
		IntervalSet s = IntervalSet.of('a');
		IntervalSet s2 = IntervalSet.of('d');
		String expecting = "{}";
		String result = (s.and(s2)).toString();
		assertEquals(result, expecting);
	}

    public void testNotSingleElement() throws Exception {
        IntervalSet vocabulary = IntervalSet.of(1,1000);
        vocabulary.add(2000,3000);
        IntervalSet s = IntervalSet.of(50,50);
        String expecting = "{1..49, 51..1000, 2000..3000}";
        String result = (s.complement(vocabulary)).toString();
        assertEquals(result, expecting);
    }

	public void testNotSet() throws Exception {
		IntervalSet vocabulary = IntervalSet.of(1,1000);
		IntervalSet s = IntervalSet.of(50,60);
		s.add(5);
		s.add(250,300);
		String expecting = "{1..4, 6..49, 61..249, 301..1000}";
		String result = (s.complement(vocabulary)).toString();
		assertEquals(result, expecting);
	}

	public void testNotEqualSet() throws Exception {
		IntervalSet vocabulary = IntervalSet.of(1,1000);
		IntervalSet s = IntervalSet.of(1,1000);
		String expecting = "{}";
		String result = (s.complement(vocabulary)).toString();
		assertEquals(result, expecting);
	}

	public void testNotSetEdgeElement() throws Exception {
		IntervalSet vocabulary = IntervalSet.of(1,2);
		IntervalSet s = IntervalSet.of(1);
		String expecting = "2";
		String result = (s.complement(vocabulary)).toString();
		assertEquals(result, expecting);
	}

    public void testNotSetFragmentedVocabulary() throws Exception {
        IntervalSet vocabulary = IntervalSet.of(1,255);
        vocabulary.add(1000,2000);
        vocabulary.add(9999);
        IntervalSet s = IntervalSet.of(50,60);
        s.add(3);
        s.add(250,300);
        s.add(10000); // this is outside range of vocab and should be ignored
        String expecting = "{1..2, 4..49, 61..249, 1000..2000, 9999}";
        String result = (s.complement(vocabulary)).toString();
        assertEquals(result, expecting);
    }

    public void testSubtractOfCompletelyContainedRange() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(12,15);
        String expecting = "{10..11, 16..20}";
        String result = (s.subtract(s2)).toString();
        assertEquals(result, expecting);
    }

    public void testSubtractOfOverlappingRangeFromLeft() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(5,11);
        String expecting = "12..20";
        String result = (s.subtract(s2)).toString();
        assertEquals(result, expecting);

        IntervalSet s3 = IntervalSet.of(5,10);
        expecting = "11..20";
        result = (s.subtract(s3)).toString();
        assertEquals(result, expecting);
    }

    public void testSubtractOfOverlappingRangeFromRight() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(15,25);
        String expecting = "10..14";
        String result = (s.subtract(s2)).toString();
        assertEquals(result, expecting);

        IntervalSet s3 = IntervalSet.of(20,25);
        expecting = "10..19";
        result = (s.subtract(s3)).toString();
        assertEquals(result, expecting);
    }

    public void testSubtractOfCompletelyCoveredRange() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(1,25);
        String expecting = "{}";
        String result = (s.subtract(s2)).toString();
        assertEquals(result, expecting);
    }

    public void testSubtractOfRangeSpanningMultipleRanges() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        s.add(30,40);
        s.add(50,60); // s has 3 ranges now: 10..20, 30..40, 50..60
        IntervalSet s2 = IntervalSet.of(5,55); // covers one and touches 2nd range
        String expecting = "56..60";
        String result = (s.subtract(s2)).toString();
        assertEquals(result, expecting);

        IntervalSet s3 = IntervalSet.of(15,55); // touches both
        expecting = "{10..14, 56..60}";
        result = (s.subtract(s3)).toString();
        assertEquals(result, expecting);
    }

	/** The following was broken:
	 	{0..113, 115..65534}-{0..115, 117..65534}=116..65534
	 */
	public void testSubtractOfWackyRange() throws Exception {
		IntervalSet s = IntervalSet.of(0,113);
		s.add(115,200);
		IntervalSet s2 = IntervalSet.of(0,115);
		s2.add(117,200);
		String expecting = "116";
		String result = (s.subtract(s2)).toString();
		assertEquals(result, expecting);
	}

    public void testSimpleEquals() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(10,20);
        Boolean expecting = new Boolean(true);
        Boolean result = new Boolean(s.equals(s2));
        assertEquals(result, expecting);

        IntervalSet s3 = IntervalSet.of(15,55);
        expecting = new Boolean(false);
        result = new Boolean(s.equals(s3));
        assertEquals(result, expecting);
    }

    public void testEquals() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        s.add(2);
        s.add(499,501);
        IntervalSet s2 = IntervalSet.of(10,20);
        s2.add(2);
        s2.add(499,501);
        Boolean expecting = new Boolean(true);
        Boolean result = new Boolean(s.equals(s2));
        assertEquals(result, expecting);

        IntervalSet s3 = IntervalSet.of(10,20);
        s3.add(2);
        expecting = new Boolean(false);
        result = new Boolean(s.equals(s3));
        assertEquals(result, expecting);
    }

    public void testSingleElementMinusDisjointSet() throws Exception {
        IntervalSet s = IntervalSet.of(15,15);
        IntervalSet s2 = IntervalSet.of(1,5);
        s2.add(10,20);
        String expecting = "{}"; // 15 - {1..5, 10..20} = {}
        String result = s.subtract(s2).toString();
        assertEquals(result, expecting);
    }

    public void testMembership() throws Exception {
        IntervalSet s = IntervalSet.of(15,15);
        s.add(50,60);
        assertTrue(!s.member(0));
        assertTrue(!s.member(20));
        assertTrue(!s.member(100));
        assertTrue(s.member(15));
        assertTrue(s.member(55));
        assertTrue(s.member(50));
        assertTrue(s.member(60));
    }

    // {2,15,18} & 10..20
    public void testIntersectionWithTwoContainedElements() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(2,2);
        s2.add(15);
        s2.add(18);
        String expecting = "{15, 18}";
        String result = (s.and(s2)).toString();
        assertEquals(result, expecting);
    }

    public void testIntersectionWithTwoContainedElementsReversed() throws Exception {
        IntervalSet s = IntervalSet.of(10,20);
        IntervalSet s2 = IntervalSet.of(2,2);
        s2.add(15);
        s2.add(18);
        String expecting = "{15, 18}";
        String result = (s2.and(s)).toString();
        assertEquals(result, expecting);
    }

    public void testComplement() throws Exception {
        IntervalSet s = IntervalSet.of(100,100);
        s.add(101,101);
        IntervalSet s2 = IntervalSet.of(100,102);
        String expecting = "102";
        String result = (s.complement(s2)).toString();
        assertEquals(result, expecting);
    }

	public void testComplement2() throws Exception {
		IntervalSet s = IntervalSet.of(100,101);
		IntervalSet s2 = IntervalSet.of(100,102);
		String expecting = "102";
		String result = (s.complement(s2)).toString();
		assertEquals(result, expecting);
	}

	public void testComplement3() throws Exception {
		IntervalSet s = IntervalSet.of(1,96);
		s.add(99,65534);
		String expecting = "97..98";
		String result = (s.complement(1,Label.MAX_CHAR_VALUE)).toString();
		assertEquals(result, expecting);
	}

    public void testMergeOfRangesAndSingleValues() throws Exception {
        // {0..41, 42, 43..65534}
        IntervalSet s = IntervalSet.of(0,41);
        s.add(42);
        s.add(43,65534);
        String expecting = "0..65534";
        String result = s.toString();
        assertEquals(result, expecting);
    }

    public void testMergeOfRangesAndSingleValuesReverse() throws Exception {
        IntervalSet s = IntervalSet.of(43,65534);
        s.add(42);
        s.add(0,41);
        String expecting = "0..65534";
        String result = s.toString();
        assertEquals(result, expecting);
    }

    public void testMergeWhereAdditionMergesTwoExistingIntervals() throws Exception {
        // 42, 10, {0..9, 11..41, 43..65534}
        IntervalSet s = IntervalSet.of(42);
        s.add(10);
        s.add(0,9);
        s.add(43,65534);
        s.add(11,41);
        String expecting = "0..65534";
        String result = s.toString();
        assertEquals(result, expecting);
    }

	public void testMergeWithDoubleOverlap() throws Exception {
		IntervalSet s = IntervalSet.of(1,10);
		s.add(20,30);
		s.add(5,25); // overlaps two!
		String expecting = "1..30";
		String result = s.toString();
		assertEquals(result, expecting);
	}

	public void testSize() throws Exception {
		IntervalSet s = IntervalSet.of(20,30);
		s.add(50,55);
		s.add(5,19);
		String expecting = "32";
		String result = String.valueOf(s.size());
		assertEquals(result, expecting);
	}

	public void testToList() throws Exception {
		IntervalSet s = IntervalSet.of(20,25);
		s.add(50,55);
		s.add(5,5);
		String expecting = "[5, 20, 21, 22, 23, 24, 25, 50, 51, 52, 53, 54, 55]";
		List foo = new ArrayList();
		String result = String.valueOf(s.toList());
		assertEquals(result, expecting);
	}

	/** The following was broken:
	    {'\u0000'..'s', 'u'..'\uFFFE'} & {'\u0000'..'q', 's'..'\uFFFE'}=
	    {'\u0000'..'q', 's'}!!!! broken...
	 	'q' is 113 ascii
	 	'u' is 117
	*/
	public void testNotRIntersectionNotT() throws Exception {
		IntervalSet s = IntervalSet.of(0,'s');
		s.add('u',200);
		IntervalSet s2 = IntervalSet.of(0,'q');
		s2.add('s',200);
		String expecting = "{0..113, 115, 117..200}";
		String result = (s.and(s2)).toString();
		assertEquals(result, expecting);
	}

}