/
DataGeneration.java
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/
DataGeneration.java
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/*
* Copyright 2021 Google LLC
*
* 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.
*/
package com.google.cloud.storage;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Random;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
public final class DataGeneration implements TestRule {
private final Random rand;
public DataGeneration(Random rand) {
this.rand = rand;
}
public ByteBuffer randByteBuffer(int limit) {
ByteBuffer b = ByteBuffer.allocate(limit);
fillByteBuffer(b);
return b;
}
public void fillByteBuffer(ByteBuffer b) {
while (b.position() < b.limit()) {
int i = rand.nextInt('z');
char c = (char) i;
if (Character.isLetter(c) || Character.isDigit(c)) {
b.put(Character.toString(c).getBytes(StandardCharsets.UTF_8));
}
}
b.position(0);
}
@Override
public Statement apply(Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
base.evaluate();
}
};
}
}