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R7507/core/src/test/java/com/yahoo/ycsb/generator/TestIncrementingPrintableStringGenerator.java
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TestIncrementingPrintableStringGenerator.java
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/**
* Copyright (c) 2016 YCSB contributors. All rights reserved.
*
* 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.generator;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertNull;
import static org.testng.Assert.fail;
import java.util.NoSuchElementException;
import org.testng.annotations.Test;
public class TestIncrementingPrintableStringGenerator {
private final static int[] ATOC = new int[] { 65, 66, 67 };
@Test
public void rolloverOK() throws Exception {
final IncrementingPrintableStringGenerator gen =
new IncrementingPrintableStringGenerator(2, ATOC);
assertNull(gen.lastValue());
assertEquals(gen.nextValue(), "AA");
assertEquals(gen.lastValue(), "AA");
assertEquals(gen.nextValue(), "AB");
assertEquals(gen.lastValue(), "AB");
assertEquals(gen.nextValue(), "AC");
assertEquals(gen.lastValue(), "AC");
assertEquals(gen.nextValue(), "BA");
assertEquals(gen.lastValue(), "BA");
assertEquals(gen.nextValue(), "BB");
assertEquals(gen.lastValue(), "BB");
assertEquals(gen.nextValue(), "BC");
assertEquals(gen.lastValue(), "BC");
assertEquals(gen.nextValue(), "CA");
assertEquals(gen.lastValue(), "CA");
assertEquals(gen.nextValue(), "CB");
assertEquals(gen.lastValue(), "CB");
assertEquals(gen.nextValue(), "CC");
assertEquals(gen.lastValue(), "CC");
assertEquals(gen.nextValue(), "AA"); // <-- rollover
assertEquals(gen.lastValue(), "AA");
}
@Test
public void rolloverOneCharacterOK() throws Exception {
// It would be silly to create a generator with one character.
final IncrementingPrintableStringGenerator gen =
new IncrementingPrintableStringGenerator(2, new int[] { 65 });
for (int i = 0; i < 5; i++) {
assertEquals(gen.nextValue(), "AA");
}
}
@Test
public void rolloverException() throws Exception {
final IncrementingPrintableStringGenerator gen =
new IncrementingPrintableStringGenerator(2, ATOC);
gen.setThrowExceptionOnRollover(true);
int i = 0;
try {
while(i < 11) {
++i;
gen.nextValue();
}
fail("Expected NoSuchElementException");
} catch (NoSuchElementException e) {
assertEquals(i, 10);
}
}
@Test
public void rolloverOneCharacterException() throws Exception {
// It would be silly to create a generator with one character.
final IncrementingPrintableStringGenerator gen =
new IncrementingPrintableStringGenerator(2, new int[] { 65 });
gen.setThrowExceptionOnRollover(true);
int i = 0;
try {
while(i < 3) {
++i;
gen.nextValue();
}
fail("Expected NoSuchElementException");
} catch (NoSuchElementException e) {
assertEquals(i, 2);
}
}
@Test
public void invalidLengths() throws Exception {
try {
new IncrementingPrintableStringGenerator(0, ATOC);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException e) { }
try {
new IncrementingPrintableStringGenerator(-42, ATOC);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException e) { }
}
@Test
public void invalidCharacterSets() throws Exception {
try {
new IncrementingPrintableStringGenerator(2, null);
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException e) { }
try {
new IncrementingPrintableStringGenerator(2, new int[] {});
fail("Expected IllegalArgumentException");
} catch (IllegalArgumentException e) { }
}
}
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