java 9 objects api sample (#2413)
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@ -6,7 +6,7 @@ public class ServiceMain {
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public static void main(String[] args) throws InterruptedException {
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ProcessHandle thisProcess = ProcessHandle.current();
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long pid = thisProcess.getPid();
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long pid = thisProcess.pid();
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Optional<String[]> opArgs = Optional.ofNullable(args);
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String procName = opArgs.map(str -> str.length > 0 ? str[0] : null).orElse(System.getProperty("sun.java.command"));
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@ -23,6 +23,11 @@ public class Java9ObjectsAPIUnitTest {
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Collections.EMPTY_LIST), is(List.of("item1", "item2")));
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}
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@Test(expected = NullPointerException.class)
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public void givenNull_whenRequireNonNullElse_thenException(){
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Objects.<List>requireNonNullElse(null, null);
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}
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@Test
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public void givenObject_whenRequireNonNullElseGet_thenObject(){
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assertThat(Objects.<List>requireNonNullElseGet(null, List::of),
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@ -32,40 +37,39 @@ public class Java9ObjectsAPIUnitTest {
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@Test
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public void givenNumber_whenInvokeCheckIndex_thenNumber(){
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int length = 5;
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assertThat(Objects.checkIndex(4, length), is(4));
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}
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try{
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@Test(expected = IndexOutOfBoundsException.class)
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public void givenOutOfRangeNumber_whenInvokeCheckIndex_thenException(){
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int length = 5;
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Objects.checkIndex(5, length);
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}catch(Exception ex){
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assertThat(ex, instanceOf(IndexOutOfBoundsException.class));
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}
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}
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@Test
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public void givenSubRange_whenCheckFromToIndex_thenNumber(){
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int length = 6;
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assertThat(Objects.checkFromToIndex(2,length,length), is(2));
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}
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try{
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@Test(expected = IndexOutOfBoundsException.class)
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public void givenInvalidSubRange_whenCheckFromToIndex_thenException(){
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int length = 6;
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Objects.checkFromToIndex(2,7,length);
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}catch(Exception ex){
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assertThat(ex, instanceOf(IndexOutOfBoundsException.class));
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}
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}
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@Test
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public void giveSubRange_whenCheckFromIndexSize_thenNumber(){
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public void givenSubRange_whenCheckFromIndexSize_thenNumber(){
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int length = 6;
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assertThat(Objects.checkFromToIndex(2,5,length), is(2));
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try{
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Objects.checkFromToIndex(2,6,length);
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}catch(Exception ex){
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assertThat(ex, instanceOf(IndexOutOfBoundsException.class));
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assertThat(Objects.checkFromIndexSize(2,3,length), is(2));
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}
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@Test(expected = IndexOutOfBoundsException.class)
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public void givenInvalidSubRange_whenCheckFromIndexSize_thenException(){
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int length = 6;
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Objects.checkFromIndexSize(2, 6, length);
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}
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