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gregw 2020-11-25 10:19:07 +01:00
parent ed9fd7cb51
commit 116705037e
1 changed files with 0 additions and 72 deletions
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72
jetty-util/src/test/java/org/eclipse/jetty/util/TrieTest.java
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@ -20,12 +20,9 @@ package org.eclipse.jetty.util;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
@ -253,73 +250,4 @@ public class TrieTest
testGetBestArray(trie);
testGetBestBuffer(trie);
}
public static int requiredCapacity(Set<String> keys)
{
List<String> list = new ArrayList<>(keys);
Collections.sort(list);
return requiredCapacity(list, 0, list.size(), 0);
}
private static int requiredCapacity(List<String> keys, int offset, int length, int index)
{
if (length == 0)
return 0;
int required = 0;
Character c = null;
for (int i = 0; i < length; i++)
{
String k = keys.get(offset + i);
if (k.length() <= index)
continue;
char n = k.charAt(index);
if (c == null)
{
required++;
c = n;
offset += i;
length -= i;
}
else if (c != n)
{
required += requiredCapacity(keys, offset, i, index + 1) + 1;
offset += i;
length -= i;
c = n;
i = 1;
}
}
if (c != null)
{
required += requiredCapacity(keys, offset, length, index + 1);
}
return required;
}
@Test
public void testRequiredCapacity()
{
assertThat(requiredCapacity(Set.of("A", "ABCD")), is(4));
assertThat(requiredCapacity(Set.of("ABC")), is(3));
assertThat(requiredCapacity(Set.of("ABC", "XYZ")), is(6));
assertThat(requiredCapacity(Set.of("A00", "A11")), is(5));
assertThat(requiredCapacity(Set.of("A00", "A01", "A10", "A11")), is(7));
assertThat(requiredCapacity(Set.of("A", "AB")), is(2));
assertThat(requiredCapacity(Set.of("A", "ABC")), is(3));
assertThat(requiredCapacity(Set.of("A", "ABCD")), is(4));
assertThat(requiredCapacity(Set.of("AB", "ABC")), is(3));
assertThat(requiredCapacity(Set.of("ABC", "ABCD")), is(4));
assertThat(requiredCapacity(Set.of("ABC", "ABCDEF")), is(6));
assertThat(requiredCapacity(Set.of("AB", "A")), is(2));
assertThat(requiredCapacity(Set.of("ABC", "ABCDEF")), is(6));
assertThat(requiredCapacity(Set.of("ABCDEF", "ABC")), is(6));
assertThat(requiredCapacity(Set.of("ABC", "ABCDEF", "ABX")), is(7));
assertThat(requiredCapacity(Set.of("ABCDEF", "ABC", "ABX")), is(7));
assertThat(requiredCapacity(Set.of("ADEF", "AQPR4", "AQZ")), is(9));
assertThat(requiredCapacity(Set.of("111", "ADEF", "AQPR4", "AQZ", "999")), is(15));
}
}