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POJava - System.setOut does not save an exception message
 

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  1. POJava - System.setOut does not save an exception message
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    <p>It seems that <code>System.setOut()</code> does not work in this test case.</p> <p>Here are problem description.</p> <ol> <li><code>test0</code> executes <code>System.setOut(new PrintStream(byteBuffer))</code> so that it stores standard output.</li> <li><code>test0</code> invokes <code>AddChild1_wy_v1.main</code>.</li> <li>In the <code>AddChild1_wy_v1.main</code>, <code>xml.addChild(null)</code> generates an exception message.</li> <li>The exception message should be stored in <code>byteBuffer</code>, but it seems it wasn't.. JVM stops running the test case once the exception message pops up. And the remaining code after <code>AddChild1_wy_v1.main</code> are not executed.</li> </ol> <p>Is there a way for jvm to execute the remaining code in <code>test0</code>?</p> <p><code>NanoAddChild1_wy_v1Tests.java</code></p> <pre><code>package tests; import junit.framework.TestCase; import java.io.ByteArrayOutputStream; import java.io.PrintStream; import net.n3.nanoxml.*; public class NanoAddChild1_wy_v1Tests extends TestCase { public void test0() throws Exception { //addchild1.out String result; ByteArrayOutputStream byteBuffer; byteBuffer = new ByteArrayOutputStream(); System.setOut(new PrintStream(byteBuffer)); AddChild1_wy_v1.main(new String[] {"/home/junghyun/Dev/nanoxml/inputs/simple.xml"}); result = new String(byteBuffer.toByteArray()); assertEquals(result, "Exception in thread \"main\" java.lang.IllegalArgumentException: child must not be null\n\tat net.n3.nanoxml.XMLElement.addChild(XMLElement.java:165)\n\tat AddChild1_wy_v1.main(AddChild1_wy_v1.java:47)\n"); } } </code></pre> <p><code>AddChild1_wy_v1.java</code></p> <pre><code>package tests; import net.n3.nanoxml.IXMLParser; import net.n3.nanoxml.IXMLReader; import net.n3.nanoxml.StdXMLReader; import net.n3.nanoxml.XMLElement; import net.n3.nanoxml.XMLParserFactory; import net.n3.nanoxml.XMLWriter; public class AddChild1_wy_v1 { public static void main(String args[]) throws Exception { if (args.length == 0) { System.err.println("Usage: java DumpXML file.xml"); Runtime.getRuntime().exit(1); } IXMLParser parser = XMLParserFactory.createDefaultXMLParser(); IXMLReader reader = StdXMLReader.fileReader(args[0]); parser.setReader(reader); XMLElement xml = (XMLElement) parser.parse(); xml.addChild (null); (new XMLWriter(System.out)).write(xml); } } </code></pre> <p><img src="https://i.stack.imgur.com/aejcj.png" alt="enter image description here"></p>
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    1. USAngelo Fuchs
    1. USJung-Hyun
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    3. PO
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    1. COplease post code as text so one can copy&paste it to the answer. An image is not so good.
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      1. POJava - System.setOut does not save an exception message
      1. USAngelo Fuchs
    2. COI'm sorry. I'm done edited.
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      1. POJava - System.setOut does not save an exception message
      1. USJung-Hyun
    3. COgreat! I used your code in my answer now. I also edited your question in the way it is expected here on SO.
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      1. POJava - System.setOut does not save an exception message
      1. USAngelo Fuchs
 

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