Benefits of sharing the debug APK with tester

On knowing -- the myths around debug APK; what is debugging? and how tester can debug and be of help to programmer?, I tell about the benefits.  The programmer, product owner and team will benefit by sharing the debug APK to tester for testing. However, make sure you are in synchronous and mutual agreement with the tester if there is a 'concern' in sharing so.

"benefits" to programmer in sharing Debug APK to tester

Test investigating using log

With the debug APK the code written to print system messages, debug messages, and stack trace will print the information into the log.  While testing, tester can learn the logs to monitor -- what's happening within the device; what's happening to the app and what's happening in the environment where the device is. Won't this help to debug and investigate the problem or incident? The additional information shared by the tester apart from the incident won't it help programmer to the trigger or cause of the incident?

Test investigating with variables and breakpoints

The source code of app is available to tester and tester is using the debug app on her/his device or emulator. During this time tester can watch the variables, execution sequence and flows, knowing the stack details around the break points and analyze the code. This will help the tester to be stronger and get skilled each time. As a return, it comes back in testing to your product/app. Getting to frame level debugging and testing, wow! Is not that a value add?  If the tester need assistance to start here, giving few hours initially is a worth investment!

Tracking and testing for consumption and allocation

Yes, testing for allocations and use of HEAP. Further testing for network consumption, battery consumption, CPU consumption and UI performance. Is this not a value add in building high performance mobile app?

"limitation" with benefits in context of tester

As the benefit, there are also limitations in what a tester can do in context.  One such context is tester not having the source code of the app but has the debug APK.

Here, the tester might not be able to look into variables, stack values and test using the breakpoints. But, the tester can decompile the APK and work with compiled code with breakpoints and watch the execution flows. This is time consuming task and the task which can end abruptly if insertion of breakpoint and flow is paused incorrectly. Reporting the problem out of this observation is not suggested unless it is very sure that there is a problem.  But this not stop from testing for consumption and allocation by the app on the device.

As this, there can arise several context which yields the limitation. Figuring out how better the testability can be visualized and making use of it in testing, is the skill of tester.  Everyone in the team will have role to help tester to acquire and hone such skills.

"why" the delay in giving a debug APK to your tester?

If you are a programmer and product owner, then on knowing these benefits, yet if you are delaying to share a debug APK with tester, then there is a concern which needs to be addressed by project management.  This is what I learn.

If you are a tester and have come to know the value you can add from your testing, it will be a unfair to be quite and not asking for the debug APK.

"closing" thought with iOS and WP debug app

As with Android APK, the iOS and WP apps also have debug apps.  The benefit of it is quite similar. As well, there are additional benefits when testing in the respective programming environment with it's devices with the debug app.

Explore the benefits. Encourage the better and useful testing for the context of product.

Debugging and the debug APK

As a textbook or reference book reader, debugging is "the process of identifying and fixing of problem that stopped the product to work as intended."

"debugging" - as how I see

As a practicing tester, I see, "debugging is a empirical activity which involves investigation, reasoning and analysis on the buggy/risky/enhancement incident to learn the details about it, so that a fix solution will be found for it." 

There are different techniques in debugging and the person doing the debugging may carry out multiple activities in parallel.  Discussing the different techniques, approaches and activities in debugging is not with scope of this writing. Hence I'm not sharing much about it, in this post.

I learn, "having the debugging attribute in the product is testability strengthening factor."

"no!" to debug APK while USB Debugging is enabled?

In my testing practice, I test for mobile apps as well. I test Android, iOS and WP apps.  In the context of this blog post writing, I will stick on to Android app and Android APK.

It is very common for a programmer to have "USB Debugging" option enabled on her/his Android device by turning on 'Developer' permission. So the programmer will be able to install the Android app while it is being developed. Further the programmer will use this installed app for testing and debugging, typically.

When tester enable 'Developer' permission and choose "USB Debugging" option to assist in debugging the problems in app, won't that help in developing app? Won't it reduce the time and efforts of the programmer in analyzing the problem when the tester write the detailed Test Investigation report from the debugging? To a tester, who aspire to be skilled mobile app tester, it is very usual to have this setup on her/his test or personal device as the programmer will have.

If so, then have you ever said "no!" to share the debug app to your tester who has same interest in the product as the programmer and product owner?  Why? I will leave it to you for introspection.

"few" myths around sharing the debug APK

There are myths which gives fear in mind when asked for the debug APK. I have tired to demystify few of them here and help to be confident in sharing the debug APK with your tester on mutual understanding and agreement in common interest.

"types" of debugging in developing Android APK

I understand, the IDE used to program the Android APK will use the Java debug by default. That means, the code compiled in debug mode will generate the APK which works with tools based out of Java to see the internals of app.

Along with this, if the IDE supports different configurations of debugging, it can be used. I have not used apart from 'Java' type so far. Hence I cannot share anything further on this.

By the way, when I say "developing", I mean programming along with testing.


"differences" between the debug APK and non-debug APK

When said non-debug APK, the assumption is that it will be a release APK. The debug APK is for the testing purpose. In practice, the release APK will have debug attribute to false. Beside this, the certificates used to sign the APK will be different when it is debug APK and the release APK. These certificates will be bound to date for expiry.

Both debug and non-debug APKs can be ZIP aligned and signed.  Making sure the log writing code is available in the app is essential to print system messages, debug messages and stack trace.

next Post

In the next blog post, I will share the benefits what the programmer and interested stakeholder can get by sharing the debug APK with the tester.