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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vdslib.distribution;
import org.junit.Test;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class GroupTestCase {
private void assertDistribution(String spec, int redundancy, String expectedResult) throws ParseException {
Group.Distribution distribution = new Group.Distribution(spec, redundancy);
assertEquals(spec, distribution.toString());
int[] resultArray = distribution.getRedundancyArray(redundancy);
StringBuilder sb = new StringBuilder();
for (int i=0; i<resultArray.length; ++i) {
if (i != 0) sb.append(',');
sb.append(resultArray[i]);
}
assertEquals("Spec: \"" + spec + "\", redundancy " + redundancy + " got unexpected result", expectedResult, sb.toString());
}
private void assertDistributionFailure(String spec, int redundancy, String expectedError) {
try{
new Group.Distribution(spec, redundancy);
fail("Failed to fail parsing of spec \"" + spec + "\", redundancy " + redundancy + " with failure: " + expectedError);
} catch (Exception e) {
assertEquals(expectedError, e.getMessage());
}
}
@Test
public void testStarConversion() throws ParseException {
assertDistribution("1|*|*", 5, "2,2,1");
assertDistribution("1|*|*", 6, "3,2,1");
assertDistribution("1|*|*", 3, "1,1,1");
assertDistribution("1|*|*", 2, "1,1");
assertDistribution("4|*", 3, "3");
assertDistribution("2|*", 3, "2,1");
assertDistribution("*|*", 3, "2,1");
assertDistribution("*|*|*", 4, "2,1,1");
assertDistribution("*|*|*", 5, "2,2,1");
assertDistribution("*|*|*|*", 5, "2,1,1,1");
assertDistributionFailure("2|*", 0, "The max redundancy (0) must be a positive number in the range 1-255.");
assertDistributionFailure("*|2", 3, "Illegal distribution spec \"*|2\". Asterix specification must be tailing the specification.");
assertDistributionFailure("*|2|*", 3, "Illegal distribution spec \"*|2|*\". Asterix specification must be tailing the specification.");
assertDistributionFailure("0|*", 3, "Illegal distribution spec \"0|*\". Copy counts must be in the range 1-255.");
assertDistributionFailure("1|0|*", 3, "Illegal distribution spec \"1|0|*\". Copy counts must be in the range 1-255.");
assertDistributionFailure("1|a|*", 3, "Illegal distribution spec \"1|a|*\". Copy counts must be integer values in the range 1-255.");
assertDistributionFailure("1|999|*", 3, "Illegal distribution spec \"1|999|*\". Copy counts must be in the range 1-255.");
}
private void setNodes(Group g, String nodes) {
StringTokenizer st = new StringTokenizer(nodes, ",");
List<ConfiguredNode> nodeList = new ArrayList<>();
while (st.hasMoreTokens()) {
nodeList.add(new ConfiguredNode(Integer.parseInt(st.nextToken()), false));
}
g.setNodes(nodeList);
}
private void verifyUniqueHashes(Group g, Set<Integer> hashes) {
assertFalse(g.getName(), hashes.contains(g.getDistributionHash()));
hashes.add(g.getDistributionHash());
}
private Group buildGroupTree() throws ParseException {
Group root = new Group(5, "myroot", new Group.Distribution("2|*", 7));
List<Group> level_one = new ArrayList<>();
level_one.add(new Group(0, "br0", new Group.Distribution("1|1|*", 7)));
level_one.add(new Group(1, "br1", new Group.Distribution("*", 7)));
level_one.add(new Group(3, "br3", new Group.Distribution("8|*", 7)));
level_one.add(new Group(4, "br4", new Group.Distribution("1|*", 7)));
level_one.add(new Group(5, "br5", new Group.Distribution("*|*|*", 7)));
level_one.add(new Group(6, "br6", new Group.Distribution("*|*|*|*|*|*", 7)));
level_one.add(new Group(7, "br7", new Group.Distribution("*", 7)));
level_one.add(new Group(9, "br9", new Group.Distribution("1|*", 7)));
for(Group g : level_one) {
root.addSubGroup(g);
for (int i=0; i<5; ++i) {
Group child = new Group(i, g.getName() + "." + i);
g.addSubGroup(child);
List<ConfiguredNode> nodeList = new ArrayList<>();
for (int j=0; j<5; ++j) nodeList.add(new ConfiguredNode(g.getIndex() * 10 + j, false));
child.setNodes(nodeList);
}
}
// Create some irregularities
setNodes(level_one.get(3).getSubgroups().get(2), "19,7,8,17");
try{
Group br8 = new Group(5, "br8", new Group.Distribution("*", 5));
root.addSubGroup(br8);
fail(); // Should fail index 5 is in use at that level
} catch (Exception e) {
assertEquals("A subgroup with index 5 already exist.", e.getMessage());
}
try{
Group br8 = new Group(5, "br8");
Group br9 = new Group(2, "br9");
br8.addSubGroup(br9);
fail(); // Should fail as we want distribution to be set on non-leaf node
} catch (Exception e) {
assertEquals("Cannot add sub groups to a node without distribution set.", e.getMessage());
}
try{
Group br8 = new Group(5, "br8", new Group.Distribution("*", 5));
setNodes(br8, "1,2,3");
fail(); // Should fail as we can't have distribution on leaf node.
} catch (Exception e) {
assertEquals("Cannot add nodes to non-leaf group with distribution set", e.getMessage());
}
root.calculateDistributionHashValues();
Set<Integer> distributionHashes = new HashSet<>();
verifyUniqueHashes(root, distributionHashes);
return root;
}
@Test
public void testNormalusage() throws ParseException {
Group root = new Group(2, "myroot", new Group.Distribution("*", 2));
assertFalse(root.isLeafGroup());
Group branch = new Group(5, "myleaf");
assertTrue(branch.isLeafGroup());
root = buildGroupTree();
String expected = "Group(name: myroot, index: 5, distribution: 2|*, subgroups: 8) {\n"
+ " Group(name: br0, index: 0, distribution: 1|1|*, subgroups: 5) {\n"
+ " Group(name: br0.0, index: 0, nodes( 0 1 2 3 4 )) {\n"
+ " }\n"
+ " Group(name: br0.1, index: 1, nodes( 0 1 2 3 4 )) {\n"
+ " }\n"
+ " Group(name: br0.2, index: 2, nodes( 0 1 2 3 4 )) {\n"
+ " }\n"
+ " Group(name: br0.3, index: 3, nodes( 0 1 2 3 4 )) {\n"
+ " }\n"
+ " Group(name: br0.4, index: 4, nodes( 0 1 2 3 4 )) {\n"
+ " }\n"
+ " }\n";
assertEquals(expected, root.toString().substring(0, expected.length()));
assertEquals("br5.br5.0", root.getGroupForNode(52).getPath());
}
private Group.Distribution dummyDistribution() throws Exception {
return new Group.Distribution("*", 1);
}
@Test
public void testRootGroupDoesNotIncludeGroupNameWhenNoChildren() {
Group g = new Group(0, "donkeykong");
assertEquals("/", g.getUnixStylePath());
}
@Test
public void testChildNamesDoNotIncludeRootGroupName() throws Exception {
Group g = new Group(0, "donkeykong", dummyDistribution());
Group child = new Group(1, "mario");
g.addSubGroup(child);
assertEquals("/mario", child.getUnixStylePath());
}
@Test
public void testNestedGroupsAreSlashSeparated() throws Exception {
Group g = new Group(0, "donkeykong", dummyDistribution());
Group mario = new Group(1, "mario", dummyDistribution());
Group toad = new Group(2, "toad");
mario.addSubGroup(toad);
g.addSubGroup(mario);
assertEquals("/mario/toad", toad.getUnixStylePath());
}
@Test
public void testMultipleLeafGroupsAreEnumerated() throws Exception {
Group g = new Group(0, "donkeykong", dummyDistribution());
Group mario = new Group(1, "mario", dummyDistribution());
Group toad = new Group(2, "toad");
mario.addSubGroup(toad);
Group yoshi = new Group(3, "yoshi");
mario.addSubGroup(yoshi);
g.addSubGroup(mario);
Group luigi = new Group(4, "luigi");
g.addSubGroup(luigi);
assertEquals("/mario/toad", toad.getUnixStylePath());
assertEquals("/mario/yoshi", yoshi.getUnixStylePath());
assertEquals("/luigi", luigi.getUnixStylePath());
}
}
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