package tel.panfilov;

import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;

import java.io.Closeable;
import java.io.IOException;

import static org.assertj.core.api.Assertions.assertThatThrownBy;

@Slf4j
class TryWithResourcesTest {

    @Test
    void test() {
        assertThatThrownBy(() -> {
            try (Resource resource = new Resource()) {
                resource.read();
            } catch (IOException ex) {
                log.error("io exception", ex);
            }
        }).isInstanceOf(IOException.class);
    }

    class Resource implements Closeable {

        void read() throws IOException {
            throw new IOException("read");
        }

        @Override
        public void close() throws IOException {
            throw new IOException("close");
        }
    }

}

java.io.IOException: read
	at tel.panfilov.TryWithResourcesTest$Resource.read(TryWithResourcesTest.java:28)
	at tel.panfilov.TryWithResourcesTest.lambda$test$0(TryWithResourcesTest.java:18)
...
	Suppressed: java.io.IOException: close
		at tel.panfilov.TryWithResourcesTest$Resource.close(TryWithResourcesTest.java:33)
		at tel.panfilov.TryWithResourcesTest.lambda$test$0(TryWithResourcesTest.java:19)
		... 68 common frames omitted


java.lang.AssertionError: 
>>>Expecting code to raise a throwable.<<<

	at tel.panfilov.TryWithResourcesTest.test(TryWithResourcesTest.java:16)
...

try (Resource resource = new Resource()) {
    resource.read();
} catch (Exception ex) {
    if (ex.getSuppressed() != null) {
        throw ex;
    }
}

boolean success = false;
try (Resource resource = new Resource()) {
    resource.read();
    success = true;
} catch (Exception ex) {
    if (!success) {
        throw ex;
    }
}

Resource resource = null;
try {
    resource = new Resource();
    resource.read();
} finally {
    if (resource != null) {
        // здесь д.б. утильный метод
        resource.close();
    }
}