42 lines
1.3 KiB
Java
42 lines
1.3 KiB
Java
package com.baeldung.guava;
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import com.google.common.hash.HashCode;
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import com.google.common.hash.Hashing;
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import com.google.common.net.InetAddresses;
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import org.junit.Assert;
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import org.junit.Test;
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import java.net.InetAddress;
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import java.util.concurrent.ConcurrentHashMap;
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import static org.hamcrest.CoreMatchers.equalTo;
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public class GuavaMiscUtilsTest {
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@Test
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public void whenHashingData_shouldReturnCorrectHashCode() throws Exception {
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int receivedData = 123;
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HashCode hashCode = Hashing.crc32c().hashInt(receivedData);
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Assert.assertThat(hashCode.toString(), equalTo("495be649"));
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}
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@Test
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public void whenDecrementingIpAddress_shouldReturnOneLessIpAddress() throws Exception {
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InetAddress address = InetAddress.getByName("127.0.0.5");
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InetAddress decrementedAddress = InetAddresses.decrement(address);
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Assert.assertThat(decrementedAddress.toString(), equalTo("/127.0.0.4"));
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}
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@Test
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public void whenExecutingRunnableInThread_shouldLogThreadExecution() throws Exception {
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ConcurrentHashMap<String, Boolean> threadExecutions = new ConcurrentHashMap<>();
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Runnable logThreadRun = () -> threadExecutions.put(Thread.currentThread().getName(), true);
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Thread t = new Thread(logThreadRun);
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t.run();
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Assert.assertTrue(threadExecutions.get("main"));
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}
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}
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