I enabled ConsoleExtension for debugging scripts by calling installExtensions. How can I capture the console output of QJSEngine?
If you want to capture the output of the script back into your C++ program, its best if you don't use the ConsoleExtension - instead expose an API to allow the script to call your implementation directly to "print to standard output".
Take for example what Plasma ScriptEngine does - it exposes a print() method on the globalObject that scripts can use to "print output". In Plasma that would be printed out from the plasmashell process and captured by various logging mechanisms, but you can do what you want with the input to your print() function. Your global object interface can even mimic console.log().
Related
I found that some options in CompilerOption are not exported to the command line.
For example, alias all strings is available in the Closure Compiler's Java API CompilerOption but I have no idea how set this in the command line.
I know I can create a new java class, like:
Compiler c = new Compiler();
ComppilerOptions opt = new ComppilerOptions();
opt.setAliasAllString(true);
c.compile(.....);
However I have to handle the command line args myself.
Any simple idea?
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In order to try the alias all string option, I write a simple command line application based on compiler.jar.
However I found that, the result I got when open the alias all string is not what I expected.
For example:
a["prototype"]["say"]=function(){
var a="something string";
}
Given the above code, the something string will be replaced by a variable like this:
var xx="something string";
....
var a=xx;
....
This is fine, but how about the string "say"? How does the closure compiler know this should be aliased(replace it use variable) or exported(export this method)?
This is the compiled code now:
a.prototype.say=function(){....}
It seems that it export it.
While I want this:
var a="prototype",b="say",c="something string";
xx[a][b]=function(){.....}
In fact, this is the google_map-like compilation.
Is this possible?
Not all options are available from the command line - this includes aliasAllStrings. For some of them you have the following options:
Build a custom version of the compiler
Use the Java API (see example).
Use plovr
Getting the same level of compression and obfuscation as the Maps API requires code written specifically for the compiler. When properly written, you'll see property and namespace collapsing, prototype aliasing and a whole host of others. For an example of the style of code that will optimize that way, take a look at the Closure Library.
Modifying http://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/javascript/jscomp/CompilationLevel.java?r=706 is usually easy enough if you just want to play with something.
Plovr (a Closure build tool) provides an option called experimental-compiler-options, which is documented as follows:
The Closure Compiler contains many options that are only available programmatically in Java. Many of these options are experimental or not finalized, so they may not be a permanent part of the API. Nevertheless, many of them will be useful to you today, so plovr attempts to expose these the experimental-compiler-options option. Under the hood, it uses reflection in Java, so it is fairly hacky, but in practice, it is a convenient way to experiment with Closure Compiler options without writing Java code.
I am writing a Python/PyQt4 application that generates and displays a page in a QWebView widget. The page includes javascript code that I would like to be able to call functions returning data from the python application.
So far I can call functions that do not return data (using the pyqtSlot decorator), and call functions that do take parameters by exposing them as properties (using the pyqtProperty decorator). What I haven't worked out how to do is to call a python function with parameters, that returns data.
The question 9615194 explains how to do this from C++, but I cannot see how to transfer this to PyQt4.
I suspect you're not using the result= keyword to specify the return value in your pyqtSlot decorator?
#pyqtSlot(str, result=str)
def echo(self, phrase):
return self.parent().echo(phrase)
I ran afoul of this myself recently. No errors are generated if you omit result=, the method just silently returns nothing. Pretty maddening 'til I figured it out. See my answer to this question for a worked example.
What is the most efficient way to check if the current QTP test execution is interactive, i.e. not part of a QC test set execution launched from the QC test lab?
Do you guys know a cool way? WR used to have a batch run flag which reliably was cleared for all executions from within the IDE. Maybe QTP has something like this, and I overlooked it?
First, I thought about looking at the OnError property:
Set qtApp = getObject("","QuickTest.Application")
qtApp.Test.Settings.Run.OnError now returns one of these possible values:
"Dialog", "NextIteration", "Stop" or "NextStep".
This would allow me to look at the OnError setting, which probably is <> "Dialog" and <> "Stop" when execution is part of a test set, but:
I managed to avoid the automation interface in all my QTP tests, this would be my first exception (earlier QTP versions got confused and launched a second QTP instance, creating lots of problems...)
A tester might do an "interactive" run from within the QTP IDE with this setting set to "NextStep" or "NextIteration", which I then would misinterpret in my code.
It does not work, even if dialogs are not coming up (due to execution from a QC test set), the value returned is "Dialog". DOH!
No need to go to the automation object, it is exposed in the Setting object.
If Setting("IsInTestDirectorTest") Then
Print "Run from QC"
Else
Print "Not run from QC"
End If
Note that TestDirector (TD) is the historical name of QualityCenter (QC).
It might be an option to use
Public Function IsTestSetRun ()
Dim Result: Result=false
If not QCUtil is Nothing then
If not QCUtil.CurrentTestSetTest is Nothing then
Result=true
End If
End If
IsTestSetRun=Result
End Function
which is based on QCUtil.CurrentTestSetTest. Unfortunately, it returns true if you run a GUI test interactively, so it is not really a complete solution.
But since the other option does not work with BPT components, I am now using this option.
I am using fork() and execvp() to spawn a process that must believe it is connected to an interactive terminal for it to function properly.
Once spawned, I want to capture all the output from the process, as well as be able to send input to the process.
I suspect psuedo-ttys may help here. Does anyone have a snippet on how to do this?
You want to call forkpty(). From the man page:
#include <pty.h> /* for openpty and forkpty */
pid_t forkpty(int *amaster, char *name, struct termios *termp, struct
winsize *winp);
Link with -lutil.
The forkpty() function combines openpty(), fork(), and login_tty() to
create a new process operating in a pseudo-terminal. The file descrip‐
tor of the master side of the pseudo-terminal is returned in amaster,
and the filename of the slave in name if it is not NULL. The termp and
winp parameters, if not NULL, will determine the terminal attributes
and window size of the slave side of the pseudo-terminal.
Your parent process talks to the child by reading and writing from the file descriptor that forkpty stores in "amaster" - this is called the master pseudo-terminal device. The child just talks to stdin and stdout, which are connected to the slave pseudo-terminal device.
Expect was already mentioned for use via Tcl, but it can also be used without Tcl by treating it as a C library and calling the API documented here
There's a package called "expect" which you should use. It uses a scripting language called tcl (pronounced tickle).
https://core.tcl-lang.org/expect/
In Flash/Flex, is it possible to capture the result of 'trace' in code?
So, for example, if one part of the code calls trace("foo"), I'd like to automatically capture the string "foo" and pass it to some other function.
Edit: I'm not interested in trying to use trace instead of a proper logging framework… I want to write a plugin for FlexUnit, so when a test fails it can say something like: "Test blah failed. Here is the output: ... traced text ...".
Edit 2: I only want to capture the results of trace. Or, in other words, even though my code uses a proper logging framework, I want to handle gracefully code that's still using trace for logging.
As far as I know it's impossible to do it externally, google brings up no results. Have you considered creating a variable for the output and then adding that to the log, eg:
var outputtext = "text";
trace(outputtext);
// log outputtext here
Disregard if it isn't feasible, but I can't think of any other way.
However you can do it internally, if it's just for development purposes: http://broadcast.artificialcolors.com/index.php?c=1&more=1&pb=1&tb=1&title=logging_flash_trace_output_to_a_text_fil
If you want to write traces to a log, you can just use the Debug version of Flash Player and tell it to log traces.
I have a Debug.write method that sends the passed messages over a LocalConnection which I use that instead of trace. My requirement is to be able to capture the debug statements even when the SWF is running out of the authoring environment, but you can use this method to capture the trace messages.
As far as I understood you don't want to use logging, which is of course the right way to do it.
So, you can simply create a Static class with method trace, and call this method from anywhere in the application, that's how you will get all traces to one place, then could do what ever you want with the trace string before printing it to console.
Another way is to create bubbling trace event and dispatch it whenever you want to trace message, then add listener to STAGE for it and catch all events...
Hope its help
I would suggest looking through the source for the swiz framework. They use the flex internal logLogger app-wide and use best practices in a good majority of their code.