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[BAEL-13505] Move articles out of core-java part 1

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Sjmillington
2019-09-05 17:44:52 +01:00
parent 434bfc980e
commit 3e155818d5
36 changed files with 28 additions and 0 deletions
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92
core-java-modules/core-java-8/src/test/java/com/baeldung/java8/JavaTryWithResourcesLongRunningUnitTest.java
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@@ -1,92 +0,0 @@
package com.baeldung.java8;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import java.util.Scanner;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class JavaTryWithResourcesLongRunningUnitTest {
private static final Logger LOG = LoggerFactory.getLogger(JavaTryWithResourcesLongRunningUnitTest.class);
private static final String TEST_STRING_HELLO_WORLD = "Hello World";
private Date resource1Date, resource2Date;
// tests
/* Example for using Try_with_resources */
@Test
public void whenWritingToStringWriter_thenCorrectlyWritten() {
final StringWriter sw = new StringWriter();
try (PrintWriter pw = new PrintWriter(sw, true)) {
pw.print(TEST_STRING_HELLO_WORLD);
}
Assert.assertEquals(sw.getBuffer()
.toString(), TEST_STRING_HELLO_WORLD);
}
/* Example for using multiple resources */
@Test
public void givenStringToScanner_whenWritingToStringWriter_thenCorrectlyWritten() {
final StringWriter sw = new StringWriter();
try (Scanner sc = new Scanner(TEST_STRING_HELLO_WORLD); PrintWriter pw = new PrintWriter(sw, true)) {
while (sc.hasNext()) {
pw.print(sc.nextLine());
}
}
Assert.assertEquals(sw.getBuffer()
.toString(), TEST_STRING_HELLO_WORLD);
}
/* Example to show order in which the resources are closed */
@Test
public void whenFirstAutoClosableResourceIsinitializedFirst_thenFirstAutoClosableResourceIsReleasedFirst() throws Exception {
try (AutoCloseableResourcesFirst af = new AutoCloseableResourcesFirst(); AutoCloseableResourcesSecond as = new AutoCloseableResourcesSecond()) {
af.doSomething();
as.doSomething();
}
Assert.assertTrue(resource1Date.after(resource2Date));
}
class AutoCloseableResourcesFirst implements AutoCloseable {
public AutoCloseableResourcesFirst() {
LOG.debug("Constructor -> AutoCloseableResources_First");
}
public void doSomething() {
LOG.debug("Something -> AutoCloseableResources_First");
}
@Override
public void close() throws Exception {
LOG.debug("Closed AutoCloseableResources_First");
resource1Date = new Date();
}
}
class AutoCloseableResourcesSecond implements AutoCloseable {
public AutoCloseableResourcesSecond() {
LOG.debug("Constructor -> AutoCloseableResources_Second");
}
public void doSomething() {
LOG.debug("Something -> AutoCloseableResources_Second");
}
@Override
public void close() throws Exception {
LOG.debug("Closed AutoCloseableResources_Second");
resource2Date = new Date();
Thread.sleep(10000);
}
}
}

43
core-java-modules/core-java-8/src/test/java/com/baeldung/optional/PersonRepositoryUnitTest.java
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package com.baeldung.optional;
import org.junit.Test;
import java.util.Optional;
import static org.junit.jupiter.api.Assertions.assertAll;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
public class PersonRepositoryUnitTest {
PersonRepository personRepository = new PersonRepository();
@Test
public void whenIdIsNull_thenExceptionIsThrown() {
assertThrows(IllegalArgumentException.class,
() ->
Optional
.ofNullable(personRepository.findNameById(null))
.orElseThrow(IllegalArgumentException::new));
}
@Test
public void whenIdIsNonNull_thenNoExceptionIsThrown() {
assertAll(
() ->
Optional
.ofNullable(personRepository.findNameById("id"))
.orElseThrow(RuntimeException::new));
}
@Test
public void whenIdNonNull_thenReturnsNameUpperCase() {
String name = Optional
.ofNullable(personRepository.findNameById("id"))
.map(String::toUpperCase)
.orElseThrow(RuntimeException::new);
assertEquals("NAME", name);
}
}