我尝试用我自己的PrintStream替换默认默认值后评估脚本。

ScriptingContainer container = new ScriptingContainer();
container.setOut( my new output target printstream);
container.runScriptlet("puts \"*value*\"";);


无聊的包装Stacktrace

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.jruby.exceptions.RaiseException: (Errno::EBADF) Bad file descriptor
org.jruby.embed.EvalFailedException: (Errno::EBADF) Bad file descriptor
    at org.jruby.embed.internal.EmbedEvalUnitImpl.run(EmbedEvalUnitImpl.java:127)
    at org.jruby.embed.ScriptingContainer.runUnit(ScriptingContainer.java:1231)
    at org.jruby.embed.ScriptingContainer.runScriptlet(ScriptingContainer.java:1224)
    ... my boring test case stuff
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at junit.framework.TestCase.runTest(TestCase.java:168)
    at junit.framework.TestCase.runBare(TestCase.java:134)


有趣的包装异常

org.jruby.exceptions.RaiseException: (Errno::EBADF) Bad file descriptor
    at org.jruby.RubyIO.write(org/jruby/RubyIO.java:1319)
    at org.jruby.RubyIO.write(org/jruby/RubyIO.java:2297)
    at org.jruby.RubyIO.puts(org/jruby/RubyIO.java:2252)
    at org.jruby.RubyKernel.puts(org/jruby/RubyKernel.java:522)
    at #<Class:0x101e4f266>.(root)(<script>:1)


请注意,我的PrintStream仅打印到StringBuilder,然后在测试中针对它进行断言。 PrintStream.checkError()始终返回false,并且将其附加到StringBuilder,它永远不会失败。

每个测试都会对ScriptingContainer执行以下清理操作。我添加了resetXXX调用只是为了很好,无论是否安装它们,问题仍然存在。

final ScriptingContainer container = ...
            container.resetWriter();
            container.resetErrorWriter();
            container.terminate();


更新资料
似乎单独运行测试,一切正常,但是由于某些事情被搞砸了,因此一次又一次地执行puts测试失败。奇怪的是,鉴于我要重置作家并终止容器,为什么要拧紧它。在两次测试之间拆解Jruby时,我还需要杀死其他东西吗?

最佳答案

看来我的测试没有关闭我的ScriptingContainer。傻虫。那就是说ScriptingContainer.resetWriter()和ScriptingContainer.resetError()确实不起作用。

公共类JRubyShellPutsProblem {

public static void main(String[] args) {
    final StringBuilder b = new StringBuilder();

    for (int i = 0; i < 3; i++) {
        final ScriptingContainer container = new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.PERSISTENT);
        final PrintStream printStream = PrintStreams.printer(Printers.stringBuilder(b), LineEnding.CR, Charset.defaultCharset());
        container.setOutput(printStream);
        container.setError(printStream); // yes same as out, still works.
        container.runScriptlet("puts \"hello" + i + "\"\n");
        printStream.flush();
        System.out.println(b.toString());

        // container.resetWriter(); <-- blows up
        // container.resetErrorWriter();
        container.terminate();
    }
}


}

09-25 20:34