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Crc32cUtilityPropertyTest.java
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Crc32cUtilityPropertyTest.java
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/*
* Copyright 2022 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 static com.google.common.truth.Truth.assertThat;
import com.google.common.hash.Hashing;
import net.jqwik.api.Arbitraries;
import net.jqwik.api.Arbitrary;
import net.jqwik.api.Example;
import net.jqwik.api.ForAll;
import net.jqwik.api.Provide;
public class Crc32cUtilityPropertyTest {
@Example
public void testCrc32cCombinePropertyTest(
@ForAll("randomData") String firstObject, @ForAll("randomData") String secondObject) {
int firstPartHash = Hashing.crc32c().hashBytes(firstObject.getBytes()).asInt();
int secondPartHash = Hashing.crc32c().hashBytes(secondObject.getBytes()).asInt();
String mergedParts = firstObject + secondObject;
int combined = Hashing.crc32c().hashBytes(mergedParts.getBytes()).asInt();
assertThat(combined)
.isEqualTo(
Crc32cUtility.crc32cCombineGoogle(
firstPartHash, secondPartHash, secondObject.getBytes().length));
}
@Provide("randomData")
Arbitrary<String> stringArrays() {
return Arbitraries.strings().ofMinLength(0).ofMaxLength(1024 * 1024);
}
}