ABCA: Android Black-box Coverage Analyzer - Code Shoppy

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Project Center Kumbakonam - Code Shoppy

ABCA: Android Black-box Coverage Analyzer

Project Center Kumbakonam


To manage test projects of application under test (AUT) on Android devices, coverage analysis tools for test ade-quacy are still urgently needed. As in other platforms, code coverage is a relatively convincing criterion for confidence that no obvious component part is left untested. With the help of Soot library, we developed a tool, called Android Black-box Coverage Analyzer (ABCA) that can produce source code coverage report on AUT execution while the source code of the AUT is actually not available. https://codeshoppy.com/project-center-kumbakonam.html Given an Android application package (APK) file (in bytecode), ABCA inserts commands into the APK file to dump cover-age data on executed classes, method names, and source code statements. After exerting a test case on the instru-mented AUT on an Android device, we can then run ABCA in a PC to collect code coverage data of the AUT execution via a USB line connecting the PC and the Android device. After the test session completes, ABCA then generates a re-port on class coverage, method coverage, and line coverage of the original Java source code.

Coverage criteria [5, 4] are indispensable in evaluating the adequacy of testing effort and progress of real-world software projects. On one hand, there are many traditional coverage criteria, including line coverage, branch coverage, data-flow coverage, method coverage, for white-box testing when the source code are available. On the other hand, there are also coverage criteria, defined on the system or module interfaces, for black-box testing. An empirical study [3] observed that coverage-based techniques are also effective in detecting software faults. Recently, the booming of Android app market in the cloud has prompted many small teams and individuals to adventure in this market. We present a coverage analysis tool, called Android Black-box Coverage Analyzer (ABCA), that does not need the source code of the apps under test (AUT) but can still provide source code level coverage data. ABCA can thus be beneficial in the following two aspects. 
• Clients need protect their intellectual properties (IP) and would be reluctant to release the source code of their applications to the test service providers. In this aspect, ABCA could be a useful bridge between the clients and the test service providers and could eventually promote the test service industry to the mobile application developers. 
• ABCA makes it possible for the test service providers to gain business without leaving concerns of IP infringement to their potential clients. As a research project, ABCA also shows the solution techniques for collecting source code coverage data without access to the program source code. With the detailed coverage data, ABCA can also help diagnosing why some parts of the code cannot be reached or identifying those code segments related to certain bug traces. Academia can also use ABCA in researching coverage-based techniques for Android apps. To the best of our knowledge, the only coverage tool similar to ABCA and available to the public for Android apps is by Horváthy, Bognáry, Gergely, et al [1]. However their tool can only report coverage on the methods. In contrast, ABCA can report detailed coverage reports on lines, methods, and classes of the source code of the execution of Android APKs. ABCA runs on Microsoft Windows on PC and connects to Android devices via a USB line. It consists of two parts. 
• ABCA-instrumentor (ABCAI), that instruments the byte-code of an Android Application Package (APK) so that coverage data can be collected out of the execution of the APK. 
• ABCA-reporter (ABCAR), that monitors the execution of the instrumented APK and collects the coverage data from the APK to compile the final coverage report



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