CN111176657A - Method and system for realizing C language codec based on TTCN-3 test platform - Google Patents

Method and system for realizing C language codec based on TTCN-3 test platform Download PDF

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CN111176657A
CN111176657A CN201911274922.0A CN201911274922A CN111176657A CN 111176657 A CN111176657 A CN 111176657A CN 201911274922 A CN201911274922 A CN 201911274922A CN 111176657 A CN111176657 A CN 111176657A
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CN111176657B (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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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 compiling external data type files required by a test suite; integrating a compiler based on C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, manufacturing a static link library by using the header file, and integrating the static link library and the header file into a test suite project; adding external reference into the code of the TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, wholly compiling a test suite project, and operating the test suite to realize the coding and decoding of an external data type file. The C language codec of the TTCN-3 test platform based on C + + is optimized and realized by using the static link library, the codec adaptation module and the third-party compiler, so that the third-party compiler is directly compatible with the test platform, and the whole code modification amount is reduced.

Description

Method and system for realizing C language codec 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 a C language codec based on a C + + TTCN-3 testing platform.
Background
TTCN-3(Testing and Test Control Notification Version 3, third edition of Test and Test Control Notation) is formulated by the ETSI Technical Committee Test and description methods group (ETSI Technical Committee algorithms for Testing and Specification) and is widely applicable to Test Specification languages of various application fields and Test types. TTCN-3 provides the structure and characteristics required by black box test, supports message-based and process-based communication, and has the characteristics of built-in data matching mechanism, distributed test system architecture, support of parallel test behavior and timer, and the like. TTCN-3 has platform independence and is not bound to a specific application program or an interface thereof, nor is it bound to any test execution environment, compiler or operating system; therefore, TTCN-3 needs to complete the testing work together through the compiler, the adapter, and the codec.
For some systems under test, TTCN-3 may use its data type, however these external data types are not defined directly in TTCN-3, so it is necessary to define its mapping to TTCN-3 type. Currently, ETSI defines the mapping relationship from ASN.1(Abstract Syntax Notation One), IDL (interface description Language), XML (Extensible Markup Language), JSON (JavaScript Object Notation) and WSDL (Web services 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 for describing data representation, encoding, transmission and decoding, and provides a set of unambiguous and precise rules for describing object structures independent of specific computer hardware; most commonly used in communication protocols for describing the message format of interactive signaling. IDL belongs to CORBA and is mainly used for describing an interface of a distributed object-oriented system. XML and JSON languages are widely used in various types of tests, and WSDL is used in network tests. The implementation of these external data types depends on the actual operation of the test platform.
In order to compile and run the TTCN-3 test suite, different organizations develop some test platforms one after another; these test platforms can be classified into a C-based test platform, a C + + based test platform, and a Java-based test platform according to the language used. Currently, C-based test platforms have been rare because TTCN-3 is syntactically similar to object-oriented language, and developing C + + and Java-based platforms makes it easier to implement the mapping of TTCN-3 to platform language. When the test platform is developed to realize the external types, the internal codec types can be compiled and then are converted into TTCN-3 to be compiled in a unified way, and a third-party open source compiler can be integrated to directly compile the external types into the language based on the test platform. Although the former is better in integrity, the latter is more time-saving and labor-saving.
For example, patent document CN 102929680B discloses a method, device 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 the translator analyzes and verifies a test target file, the translator translates the TTCN-3 script into a Java file according to a predefined translation rule. And (3) constructing a Java operation support library by combining the translation rules of the translator, wherein the support library realizes the basic classes quoted in the translation scheme and completes the execution of the codes generated by translation, the recording of the execution result and other works.
When a C + + based test platform is developed, many 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 a C + + compiler after external compilation by a third party compiler, and when the external types are 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 test platform.
The invention provides a method for realizing a C language codec based on a TTCN-3 test platform, which comprises the following steps:
step S1: compiling an external data type file required by a test suite to generate a test suite project;
step S2: integrating a compiler based on C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, manufacturing a static link library by using the header file, and integrating the static link library and the header file into a test suite project;
step S3: adding external reference into the code of the TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, wholly compiling a test suite project, and operating the test suite to realize the coding and decoding of an external data type file.
Preferably, the step S2 includes:
step S21: integrating a third-party open source compiler which aims at an external data type file and is based on a C language into a test platform in a module form;
step S22: 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, 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 a C language header file into a test suite in a module form;
step S23: and writing 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 coding and decoding adaptation module and the coding and decoding part respectively realize the calling and data processing of related coding and decoding function functions of a third-party compiler.
Preferably, the step S3 includes:
step S31: modifying codes of messages related to external data type files in the test suite entering and exiting the test port, and adding a calling function of a coding and decoding adaptation module;
step S32: coding and decoding adaptation modules are written by using C + + language and integrated into a TTCN-3 test platform;
step S33: and adding connection to a static link library in a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER coding and decoding.
Preferably, the test suite is a code set of the test plan, and includes all TTCN-3 code files and external data type files supported by TTCN-3, where the external data type files include 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 the code of the TTCN-3 test platform to implement connection and data processing for various third-party compilers.
The invention provides a system for realizing a C language codec based on a TTCN-3 test platform, which comprises the following modules:
module S1: compiling an external data type file required by a test suite to generate a test suite project;
module S2: integrating a compiler based on C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, manufacturing a static link library by using the header file, and integrating the static link library and the header file into a test suite project;
module S3: adding external reference into the code of the TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, wholly compiling a test suite project, and operating the test suite to realize the coding and decoding of an external data type file.
Preferably, the module S2 includes:
module S21: integrating a third-party open source compiler which aims at an external data type file and is based on a C language into a test platform in a module form;
module S22: 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, 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 a C language header file into a test suite in a module form;
module S23: and writing 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 coding and decoding adaptation module and the coding and decoding part respectively realize the calling and data processing of related coding and decoding function functions of a third-party compiler.
Preferably, the module S3 includes:
module S31: modifying codes of messages related to external data type files in the test suite entering and exiting the test port, and adding a calling function of a coding and decoding adaptation module;
module S32: coding and decoding adaptation modules are written by using C + + language and integrated into a TTCN-3 test platform;
module S33: and adding connection to a static link library in a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER coding and decoding.
Preferably, the test suite is a code set of the test plan, and includes all TTCN-3 code files and external data type files supported by TTCN-3, where the external data type files include 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 the code of the TTCN-3 test platform to implement connection and data processing for 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 codec of the TTCN-3 test platform based on C + + by utilizing the static link library, the codec adaptation module and the third-party compiler, realizes the direct compatibility of the third-party compiler and the test platform, and reduces the whole code modification amount.
2. The invention optimizes and realizes the test platform codec module, can directly integrate the C + + based TTCN-3 test platform with the C language-based third party compiler, not only reduces the requirements on technical personnel, but also greatly reduces the repetitive work. The generation of various compiling errors can be reduced without the full-automatic integration of manual modification, the overall complexity of the project is reduced, and the working efficiency is improved.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
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 invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Aiming at the compiling test of a TTCN-3 test platform, the original realization method is to modify a C language file generated by compiling, and needs to have stronger understanding on the difference between the C + + language and the C language; meanwhile, when the external data type file is large and the definition is large, a large number of code modification points are generated, and a large amount of manpower is consumed.
The invention provides a C language codec realization method of a C + + based TTCN-3 test platform, which is a universal scheme that a C language-based third-party compiler is applied to a C + + based TTCN-3 development platform, and a static link library, a codec adaptation module and the third-party compiler are used together to realize the test platform codec, so that the test platform codec can be used without manual modification, the workload of transplanting an external codec can be greatly reduced, and the development process of various tests can be accelerated.
As shown in fig. 1, the method comprises the following specific steps:
s1, writing external data type files (ASN.1 files, XML files, JSON files or WSDL files) required by the test suite;
s2, testing the platform codec by using the method provided by the invention;
s3, adding external references into TTCN-3 codes, adding connection to a static link library into a test suite compiling script, wholly compiling the test suite, and automatically realizing external data type coding and decoding work when the test suite is operated. The external reference is to add an import statement in a TTCN-3 test code xx _ test.ttcn, and to reference external data type files such as ASN.1 in the TTCN-3 file, and belongs to the necessary operation of engineering compilation. For example: import from EUTRA _ RRC _ ASN1_ Definitions language "ASN.1:1997" all. The testing platform codec is a testing platform module which is composed of a codec adaptation module, a static link library, a header file generated by compiling by a third-party compiler and the third-party compiler. The test suite is a code set for implementing a test plan, and includes all TTCN-3 code files and external data type files supported by TTCN-3.
Further, the implementation method of S2 is specifically as follows:
s21, integrating a third-party open source compiler which aims at an external data type file and is based on a C language into a test platform in a module form;
s22, creating a static link library, which comprises the following specific 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;
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;
and S23, writing 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 adaptation module comprises a coding part and a decoding part, and the coding and decoding adaptation module and the coding and decoding part respectively realize the calling and data processing of the coding and decoding function functions related to a third-party compiler.
The coding and decoding adaptation module refers to an external C + + code called in the TTCN-3 code 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, the TITAN is a TTCN-3 open source testing platform based on C + + language launched by Ericsson, an environment is provided for creating a TTCN-3 testing suite, and a TTCN-3 Abstract Testing Suite (ATS) can be compiled into an Executable Testing Suite (ETS). The TITAN platform is internally integrated with an ASN.1 compiler, 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 testing requires the assistance of a third party open source asn.1 compiler asn1 c. asn1C is a compiler based on the C language, which is not directly compatible with the TITAN platform and can be solved by the method of the present invention.
Integrating open source codes of asn1C into a TITAN test platform, compiling an ASN.1 file into a C language file by using asn1C based on PER coding rules, and independently generating files of the same name, C and h after compiling. For example, in the LTE test suite, EUTRA _ RRC _ ASN1_ definitions is compiled to generate a series of files, where DL-CCCH-message.c and DL-CCCH-message.h represent the files compiled by DL-CCCH _ Message messages. The files generated by asn1c are used to build a statically linked library, integrating the library files and all header files into the TITAN project of the test suite.
The idea of realizing PER encoding and decoding by TITAN is as follows: in the downlink direction, the TITAN internal codec uses the BER rule to encode, and then the testing platform codec carries out BER decoding and PER recoding and sends out; in the uplink direction, after receiving the message, the testing platform codec performs PER decoding and BER recoding, and then sends the message into the TITAN for decoding by using a BER rule so as to finish the final target of comparing the message. The specific operation is as follows: firstly, modifying codes related to an ASN.1 message in and out of a test port in a test suite, and adding a calling function of an encoding and decoding adaptation module; 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 test suite to finish PER coding and decoding.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A C language codec realization method based on TTCN-3 test platform is characterized by comprising the following steps:
step S1: compiling an external data type file required by a test suite to generate a test suite project;
step S2: integrating a compiler based on C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, manufacturing a static link library by using the header file, and integrating the static link library and the header file into a test suite project;
step S3: adding external reference into the code of the TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, wholly compiling a test suite project, and operating the test suite to realize the coding and decoding of an external data type file.
2. The TTCN-3 test platform based C language codec implementation method of claim 1, wherein the step S2 includes:
step S21: integrating a third-party open source compiler which aims at an external data type file and is based on a C language into a test platform in a module form;
step S22: 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, 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 a C language header file into a test suite in a module form;
step S23: and writing 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 coding and decoding adaptation module and the coding and decoding part respectively realize the calling and data processing of related coding and decoding function functions of a third-party compiler.
3. The TTCN-3 test platform based C language codec implementation method of claim 1, wherein the step S3 includes:
step S31: modifying codes of messages related to external data type files in the test suite entering and exiting the test port, and adding a calling function of a coding and decoding adaptation module;
step S32: coding and decoding adaptation modules are written by using C + + language and integrated into a TTCN-3 test platform;
step S33: and adding connection to a static link library in a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER coding and decoding.
4. The TTCN-3 test platform based C language codec implementation method of claim 1, wherein the test suite is a code set of a test plan, comprising all TTCN-3 code files and external data type files supported by TTCN-3, the external data type files comprising any one or any multiple of an asn.1 file, an XML file, a JSON file, and a WSDL file.
5. The TTCN-3 test platform based C language codec implementation method according to claim 2, wherein the codec adaptation module is an external C + + code called in the code of the TTCN-3 test platform to implement connection and data processing for various third party compilers.
6. A C language codec implementation system based on a TTCN-3 test platform is characterized by comprising the following modules:
module S1: compiling an external data type file required by a test suite to generate a test suite project;
module S2: integrating a compiler based on C language into a TTCN-3 test platform, compiling an external data type file to generate a header file, manufacturing a static link library by using the header file, and integrating the static link library and the header file into a test suite project;
module S3: adding external reference into the code of the TTCN-3 test platform, adding connection to a static link library into a compiling script of a test suite, wholly compiling a test suite project, and operating the test suite to realize the coding and decoding of an external data type file.
7. The TTCN-3 test platform based C language codec implementation system of claim 6, wherein the module S2 includes:
module S21: integrating a third-party open source compiler which aims at an external data type file and is based on a C language into a test platform in a module form;
module S22: 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, 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 a C language header file into a test suite in a module form;
module S23: and writing 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 coding and decoding adaptation module and the coding and decoding part respectively realize the calling and data processing of related coding and decoding function functions of a third-party compiler.
8. The TTCN-3 test platform based C language codec implementation system of claim 6, wherein the module S3 includes:
module S31: modifying codes of messages related to external data type files in the test suite entering and exiting the test port, and adding a calling function of a coding and decoding adaptation module;
module S32: coding and decoding adaptation modules are written by using C + + language and integrated into a TTCN-3 test platform;
module S33: and adding connection to a static link library in a compiling script of the test suite, and compiling the whole TTCN-3 test suite to finish PER coding and decoding.
9. The TTCN-3 test platform based C language codec implementation system of claim 6, wherein the test suite is a code set of a test plan, comprising all TTCN-3 code files and external data type files supported by TTCN-3, the external data type files comprising any one or any multiple of asn.1 files, XML files, JSON files, and WSDL files.
10. The TTCN-3 test platform based C language codec implementation system of claim 7, wherein the codec adaptation module is an external C + + code called in the code of the TTCN-3 test platform to implement connection and data processing to various third party compilers.
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