122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
/* @test /nodynamiccopyright/
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* @bug 7196163
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* @summary Verify that variables can be used as operands to try-with-resources
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* @compile/fail/ref=TwrForVariable1.out --release 8 -XDrawDiagnostics -Xlint:-options TwrForVariable1.java
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* @compile TwrForVariable1.java
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* @run main TwrForVariable1
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*/
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public class TwrForVariable1 implements AutoCloseable {
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private static int closeCount = 0;
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public static void main(String... args) {
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TwrForVariable1 v = new TwrForVariable1();
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try (v) {
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assertCloseCount(0);
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}
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try (/**@deprecated*/v) {
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assertCloseCount(1);
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}
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try (v.finalWrapper.finalField) {
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assertCloseCount(2);
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} catch (Exception ex) {
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}
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try (new TwrForVariable1() { }.finalWrapper.finalField) {
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assertCloseCount(3);
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} catch (Exception ex) {
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}
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try ((args.length > 0 ? v : new TwrForVariable1()).finalWrapper.finalField) {
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assertCloseCount(4);
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} catch (Exception ex) {
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}
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try {
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throw new CloseableException();
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} catch (CloseableException ex) {
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try (ex) {
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assertCloseCount(5);
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}
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}
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assertCloseCount(6);
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// null test cases
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TwrForVariable1 n = null;
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try (n) {
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}
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try (n) {
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throw new Exception();
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} catch (Exception e) {
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}
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assertCloseCount(6);
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// initialization exception
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TwrForVariable1 i1 = new TwrForVariable1();
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try (i1; TwrForVariable1 i2 = new TwrForVariable1(true)) {
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} catch (Exception e) {
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}
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assertCloseCount(7);
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// multiple closures
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TwrForVariable1 m1 = new TwrForVariable1();
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try (m1; TwrForVariable1 m2 = m1; TwrForVariable1 m3 = m2;) {
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}
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assertCloseCount(10);
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// aliasing of variables keeps equality (bugs 6911256 6964740)
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TwrForVariable1 a1 = new TwrForVariable1();
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try (a1; TwrForVariable1 a2 = a1;) {
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if (a2 != a2)
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throw new RuntimeException("Unexpected inequality.");
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}
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assertCloseCount(12);
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// anonymous class implementing AutoCloseable as variable in twr
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AutoCloseable a = new AutoCloseable() {
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public void close() { };
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};
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try (a) {
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} catch (Exception e) {}
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}
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static void assertCloseCount(int expectedCloseCount) {
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if (closeCount != expectedCloseCount)
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throw new RuntimeException("bad closeCount: " + closeCount +
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"; expected: " + expectedCloseCount);
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}
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public void close() {
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closeCount++;
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}
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final FinalWrapper finalWrapper = new FinalWrapper();
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static class FinalWrapper {
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public final AutoCloseable finalField = new AutoCloseable() {
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@Override
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public void close() throws Exception {
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closeCount++;
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}
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};
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}
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static class CloseableException extends Exception implements AutoCloseable {
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@Override
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public void close() {
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closeCount++;
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}
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}
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public TwrForVariable1(boolean throwException) {
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if (throwException)
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throw new RuntimeException("Initialization exception");
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}
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public TwrForVariable1() {
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this(false);
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}
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}
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