CN111176657B - C language codec implementation method and system based on TTCN-3 test platform - Google Patents

C language codec implementation method and system based on TTCN-3 test platform Download PDF

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CN111176657B
CN111176657B CN201911274922.0A CN201911274922A CN111176657B CN 111176657 B CN111176657 B CN 111176657B CN 201911274922 A CN201911274922 A CN 201911274922A CN 111176657 B CN111176657 B CN 111176657B
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CN111176657A (en
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王可欣
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Shanghai Institute of Microwave Technology CETC 50 Research Institute
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/40—Transformation of program code
    • G06F8/41—Compilation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/36—Preventing errors by testing or debugging software
    • G06F11/362—Software debugging
    • G06F11/3624—Software debugging by performing operations on the source code, e.g. via a compiler
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The invention provides a method and a system for realizing a C language codec based on a TTCN-3 test platform, which are used for writing external data type files required by a test suite; integrating a compiler based on a C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, and manufacturing a static link library by using the header file to integrate the static link library and the header file into a test suite project; external references are added in codes of a TTCN-3 test platform, connection to a static link library is added in a compiling script of a test suite, test suite engineering is compiled integrally, and the test suite is operated to realize encoding and decoding of external data type files. And a C language codec of a TTCN-3 testing platform based on C++ is optimally realized by using a static link library, a codec adaptation module and a third party compiler, so that the direct compatibility of the third party compiler and the testing platform is realized, and the whole code modification quantity is reduced.

Description

C language codec implementation method and system based on TTCN-3 test platform
Technical Field
The invention relates to the technical field of automatic testing, in particular to a method and a system for realizing a C language codec based on a TTCN-3 testing platform, and particularly relates to a method for realizing the C language codec based on a C++ TTCN-3 testing platform.
Background
TTCN-3 (Testing and Test Control Notation Version, third edition of test and test control notation) was formulated by the ETSI technical Committee test and description methods group (ETSI Technical Committee Methods for Testing and Specification) and is widely used in test specification languages for various application fields and test types. TTCN-3 provides the necessary structure and features for black box testing, supports message-based and process-based communications, and has the features of built-in data matching mechanisms, distributed test system architecture, support for parallel test behavior, and timers. TTCN-3 has platform independence, and is not bound to a specific application program or an interface thereof, nor to any test execution environment, compiler or operating system; thus, TTCN-3 needs to perform testing work together through the compiler, adapter, and codec.
For some systems under test, TTCN-3 may use its data types, however these external data types are not directly defined in TTCN-3, so its mapping to TTCN-3 types needs to be defined. ETSI currently defines the mapping relationship of asn.1 (Abstract Syntax Notation One ), IDL (Interface Description Language, interface description language), XML (Extensible Markup Language ), JSON (JavaScript Object Notation, JS object markup), and WSDL (Web Services Description Language, web service description language) to TTCN-3 in TTCN-3 protocol. ASN.1 is a standard defining the specification form of abstract data types, is a flexible notation describing data representation, encoding, transmission and decoding, and provides a set of unambiguous and precise rules to describe the structure of objects independent of specific computer hardware; most commonly used in communication protocols, message formats for describing interactive signaling. IDL belongs to CORBA and is mainly used for describing interfaces of a distributed object-oriented system. XML and JSON languages are widely used in various tests, and WSDL is used in network tests. The implementation of these external data types depends on the actual operation of the test platform.
For compiling and running the TTCN-3 testing suite, different organizations develop a plurality of testing platforms in succession; these test platforms can be classified into C-based test platforms, c++ based test platforms, and Java-based test platforms according to the language used. At present, C-based test platforms have been less common because TTCN-3 is syntactically similar to object-oriented languages, and developing a C++ and Java-based platform is easier to implement mapping of TTCN-3 to platform language. When the development test platform realizes the external types, the internal coder and decoder types can be compiled and converted into TTCN-3 and then compiled uniformly, and a third-party open source compiler can be integrated to directly compile the external types into the language based on the test platform. While the former has better integrity, the latter is more time-and labor-saving.
For example, patent document CN 102929680B discloses a method, apparatus and system for converting TTCN-3 script into Java source code, so as to compile TTCN-3 script. Firstly, a translator of the TTCN-3 script is constructed, and after analysis and verification are carried out on the test target file, the translator translates the TTCN-3 script into a Java file according to a predefined translation rule. And constructing a Java operation support library by combining the translation rules of the translator, wherein the support library realizes the basic class which is introduced in the translation scheme, and completes the work of executing the code generated by translation, recording the execution result and the like.
When developing a test platform based on C++, a plurality of lightweight open source compilers are written by using a C language, and the mutual compatibility of a third party compiler and the test platform is the basis for ensuring that external types are correctly executed. The current method is to manually modify the generated C language file to match with the C++ compiler after external compiling by a third party compiler, and when the external type is more and more complex, the code modification workload is huge.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for realizing a C language codec based on a TTCN-3 testing platform.
The invention provides a C language codec implementation method based on a TTCN-3 test platform, which comprises the following steps:
step S1: writing an external data type file required by the test suite to generate a test suite project;
step S2: integrating a compiler based on a C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, and manufacturing a static link library by using the header file to integrate the static link library and the header file into a test suite project;
step S3: external references are added in codes of a TTCN-3 test platform, connection to a static link library is added in a compiling script of a test suite, test suite engineering is compiled integrally, and the test suite is operated to realize encoding and decoding of external data type files.
Preferably, the step S2 includes:
step S21: integrating a third-party open source compiler based on a C language aiming at an external data type file into a test platform in a module form;
step S22: converting the external data type file by using a third-party compiler according to the required coding rule to obtain a series of C-language files, compiling the C-language files by using a Linux C-language compiler to obtain a series of link files, manufacturing a static link library by using the link files, and integrating the static link library and the C-language header file into a test suite in a module form;
step S23: and compiling a coding and decoding adaptation module by using a C++ language and integrating the coding and decoding adaptation module into a test suite, wherein the coding and decoding adaptation module comprises a coding part and a decoding part, and the calling and the data processing of the related coding and decoding function functions of the third-party compiler are respectively realized.
Preferably, the step S3 includes:
step S31: modifying codes of information related to an external data type file in and out of a test port in a test suite, and adding a code and decode adaptation module call function;
step S32: coding and decoding adaptation modules are written by using C++ language and integrated into a TTCN-3 testing platform;
step S33: and adding a connection to the static link library into a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER encoding and decoding.
Preferably, the test suite is a code set of a test plan including all TTCN-3 code files and TTCN-3 supported external data type files including any one or more of ASN.1 files, XML files, JSON files and WSDL files.
Preferably, the codec adaptation module is external C++ code called in code of the TTCN-3 test platform to realize connection and data processing of various third party compilers.
The invention provides a C language codec realizing system based on a TTCN-3 testing platform, which comprises the following modules:
module S1: writing an external data type file required by the test suite to generate a test suite project;
module S2: integrating a compiler based on a C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, and manufacturing a static link library by using the header file to integrate the static link library and the header file into a test suite project;
module S3: external references are added in codes of a TTCN-3 test platform, connection to a static link library is added in a compiling script of a test suite, test suite engineering is compiled integrally, and the test suite is operated to realize encoding and decoding of external data type files.
Preferably, the module S2 comprises:
module S21: integrating a third-party open source compiler based on a C language aiming at an external data type file into a test platform in a module form;
module S22: converting the external data type file by using a third-party compiler according to the required coding rule to obtain a series of C-language files, compiling the C-language files by using a Linux C-language compiler to obtain a series of link files, manufacturing a static link library by using the link files, and integrating the static link library and the C-language header file into a test suite in a module form;
module S23: and compiling a coding and decoding adaptation module by using a C++ language and integrating the coding and decoding adaptation module into a test suite, wherein the coding and decoding adaptation module comprises a coding part and a decoding part, and the calling and the data processing of the related coding and decoding function functions of the third-party compiler are respectively realized.
Preferably, the module S3 comprises:
module S31: modifying codes of information related to an external data type file in and out of a test port in a test suite, and adding a code and decode adaptation module call function;
module S32: coding and decoding adaptation modules are written by using C++ language and integrated into a TTCN-3 testing platform;
module S33: and adding a connection to the static link library into a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER encoding and decoding.
Preferably, the test suite is a code set of a test plan including all TTCN-3 code files and TTCN-3 supported external data type files including any one or more of ASN.1 files, XML files, JSON files and WSDL files.
Preferably, the codec adaptation module is external C++ code called in code of the TTCN-3 test platform to realize connection and data processing of various third party compilers.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention optimizes and realizes the C language coder-decoder of the TTCN-3 testing platform based on C++ by utilizing the static link library, the coding-decoding adapting module and the third-party compiler, realizes the direct compatibility of the third-party compiler and the testing platform, and reduces the whole code modifier.
2. The invention optimizes and realizes the test platform codec module, and can lead the TTCN-3 test platform based on C++ to be directly integrated with the third party compiler based on C language, thereby not only reducing the requirements on technicians, but also greatly reducing the repetitive work. The full-automatic integration without manual modification can also reduce the generation of various compiling errors, reduce the overall complexity of engineering and improve the working efficiency.
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Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Aiming at the compiling test of the TTCN-3 testing platform, the original implementation method is to modify the C language file generated by compiling, and the difference between the C++ language and the C language needs to be known strongly; meanwhile, when the external data type file is large and the definition is more, a large number of code modification points are generated, and a large amount of manpower is required.
The invention provides a C++ based method for realizing a C language codec of a TTCN-3 test platform, which is based on a general scheme that a third party compiler based on the C language is applied to a TTCN-3 development platform based on the C++ and realizes the test platform codec together with the third party compiler by using a static link library and a codec adaptation module, and can be used without manual modification, thereby greatly reducing the workload of transplanting an external codec and accelerating the development process of various tests.
As shown in fig. 1, the specific steps of the present invention are as follows:
s1, writing an external data type file (ASN.1 file, XML file, JSON file or WSDL file) required by a test suite;
s2, using the method provided by the invention to realize the test platform coder-decoder;
and S3, adding external references into the TTCN-3 code, adding connection to the static link library into a compiling script of the test suite, integrally compiling the test suite, and automatically realizing external data type encoding and decoding work when the test suite is operated. The external reference is to add an import statement into a TTCN-3 test code xx_test.ttcn, and refer external data type files such as ASN.1 into the TTCN-3 file, which belongs to the necessary operation of engineering compiling. For example: import from EUTRA _RRC_ASN1_ Definitions language "ASN.1:1997" all. The test platform codec is a test platform module composed of a codec adaptation module, a static link library, a header file compiled and generated by a third-party compiler and the third-party compiler. The test suite is a code set that implements a test plan, including all TTCN-3 code files and external data type files supported by TTCN-3.
Further, the implementation method of S2 specifically includes:
s21, integrating a third-party open source compiler based on a C language aiming at a certain external data type file into a test platform in a module form;
s22, manufacturing a static link library, which specifically comprises the following steps:
step A, converting an external data type file by using a third party compiler according to a required coding rule to obtain a series of C language files;
step B, compiling the C language file by using a Linux C language compiler to obtain a series of link files, and manufacturing a static link library by using the link files;
step C, integrating the static link library and the C language header file into a test suite in a module form;
s23, coding and decoding adaptation modules are written in a C++ language and integrated into a test suite, wherein the adaptation modules comprise coding parts and decoding parts, and the calling and the data processing of related coding and decoding function functions of the third-party compiler are respectively realized.
The encoding and decoding adaptation module refers to external C++ codes called in TTCN-3 codes and is used for realizing connection and data processing of various third-party compilers.
The TTCN-3 testing platform based on C++ used in actual operation is a TITAN platform, wherein TITAN is a TTCN-3 open source testing platform based on C++ language initiated by Iris company, provides environment for creating a TTCN-3 testing suite, and can compile a TTCN-3 Abstract Testing Sleeve (ATS) into an Executable Testing Sleeve (ETS). The TITAN platform is integrated with an ASN.1 compiler inside, but the compiler only supports basic coding rules (BER), regular coding rules (CER) and atypical coding rules (DER), and does not support compact coding rules (PER). The LTE communication protocol RRC layer fully adopts PER coding rules, so the communication protocol test requires assistance from the third party open source asn.1 compiler asn1 c. asn1C is a compiler based on C language, which is not directly compatible with TITAN platform, and can solve the problems by using the method of the invention.
And integrating the open source code of asn1C into a TITAN test platform, compiling an ASN.1 file into a C language file based on PER coding rules by using asn1C, and independently generating homonymous.c and.h files by each message after compiling. For example, in the LTE test suite, eutra_rrc_asn1_definitions are compiled to generate a series of files, where DL-CCCH-message.c and DL-CCCH-message.h represent the files for which dl_ccch_message messages were compiled. And establishing a static link library by using the file generated by asn1c, and integrating the library file and all header files into a TITAN project of the test suite.
The idea of the TITAN for realizing PER coding and decoding is as follows: in the downlink direction, firstly, using BER rule coding by a TITAN internal coder-decoder, then, carrying out BER decoding and PER recoding by a test platform coder-decoder, and then, sending out; in the uplink direction, after receiving the message, the test platform codec firstly performs PER decoding and BER recoding, and then sends the message into the TITAN to perform decoding by using BER rules so as to complete the final target of comparison message. The specific operation is as follows: firstly, modifying codes related to ASN.1 information entering and exiting a test port in a test suite, and adding a code and decode adaptation module calling function; secondly, compiling a coding and decoding adaptation module by using a C++ language and integrating the coding and decoding adaptation module into a test platform; then, adding connection to a static link library in a compiling script of the test suite; and finally compiling the whole TTCN-3 testing suite to finish PER encoding and decoding.
Those skilled in the art will appreciate that the systems, apparatus, and their respective modules provided herein may be implemented entirely by logic programming of method steps such that the systems, apparatus, and their respective modules are implemented as logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc., in addition to the systems, apparatus, and their respective modules being implemented as pure computer readable program code. Therefore, the system, the apparatus, and the respective modules thereof provided by the present invention may be regarded as one hardware component, and the modules included therein for implementing various programs may also be regarded as structures within the hardware component; modules for implementing various functions may also be regarded as being either software programs for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (6)

1. A C language codec implementation method based on a TTCN-3 test platform is characterized by comprising the following steps:
step S1: writing an external data type file required by the test suite to generate a test suite project;
step S2: integrating a compiler based on a C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, and manufacturing a static link library by using the header file to integrate the static link library and the header file into a test suite project;
step S3: adding external references into codes of a TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, integrally compiling test suite engineering, and running the test suite to realize encoding and decoding of external data type files;
the step S2 includes:
step S21: integrating a third-party open source compiler based on a C language aiming at an external data type file into a test platform in a module form;
step S22: converting the external data type file by using a third-party open source compiler according to a required coding rule to obtain a series of C language files, compiling the C language files by using a LinuxC language compiler to obtain a series of link files, manufacturing a static link library by using the link files, and integrating the static link library and the C language header file into a test suite in a module form;
step S23: coding and decoding adaptation modules are written in C++ language and integrated into a test suite, wherein the coding and decoding adaptation modules comprise coding parts and decoding parts, and the calling and data processing of related coding and decoding function functions of a third-party open source compiler are respectively realized;
the step S3 includes:
step S31: modifying codes of information related to an external data type file in and out of a test port in a test suite, and adding a code and decode adaptation module call function;
step S32: coding and decoding adaptation modules are written by using C++ language and integrated into a TTCN-3 testing platform;
step S33: and adding a connection to the static link library into a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER encoding and decoding.
2. The method of claim 1, wherein the test suite is a code set of a test plan including all TTCN-3 code files and TTCN-3 supported external data type files including any one or more of asn.1 files, XML files, JSON files, and WSDL files.
3. The method for implementing a C-language codec based on a TTCN-3 test platform according to claim 1, wherein the codec adaptation module is an external c++ code called in the code of the TTCN-3 test platform, so as to implement connection and data processing for various third-party compilers.
4. A C language codec realizing system based on a TTCN-3 testing platform is characterized by comprising the following modules:
module S1: writing an external data type file required by the test suite to generate a test suite project;
module S2: integrating a compiler based on a C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, and manufacturing a static link library by using the header file to integrate the static link library and the header file into a test suite project;
module S3: adding external references into codes of a TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, integrally compiling test suite engineering, and running the test suite to realize encoding and decoding of external data type files;
the module S2 includes:
module S21: integrating a third-party open source compiler based on a C language aiming at an external data type file into a test platform in a module form;
module S22: converting the external data type file by using a third-party open source compiler according to a required coding rule to obtain a series of C language files, compiling the C language files by using a LinuxC language compiler to obtain a series of link files, manufacturing a static link library by using the link files, and integrating the static link library and the C language header file into a test suite in a module form;
module S23: coding and decoding adaptation modules are written in C++ language and integrated into a test suite, wherein the coding and decoding adaptation modules comprise coding parts and decoding parts, and the calling and data processing of related coding and decoding function functions of a third-party open source compiler are respectively realized;
the module S3 includes:
module S31: modifying codes of information related to an external data type file in and out of a test port in a test suite, and adding a code and decode adaptation module call function;
module S32: coding and decoding adaptation modules are written by using C++ language and integrated into a TTCN-3 testing platform;
module S33: and adding a connection to the static link library into a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER encoding and decoding.
5. The TTCN-3 test platform based C-language codec implementation system of claim 4, wherein the test suite is a code set of a test plan including all TTCN-3 code files and TTCN-3 supported external data type files including any one or more of asn.1 files, XML files, JSON files, and WSDL files.
6. The TTCN-3 test platform based C-language codec implementation system of claim 4, wherein the codec adaptation module is external c++ code called in code of the TTCN-3 test platform to implement connection and data processing for various third party compilers.
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