JP2013145443A - Test code generation device, test code generation method and test code generation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a test code appropriate to various test cases on the basis of a determination table.SOLUTION: A test code generation device executes the steps of: storing a determination table in which a condition for a software program to be tested is associated with a corresponding operation, a predetermined test code corresponding to the condition or the operation and a user test code corresponding to the condition or the operation; instructing a user test code storage unit to store an input user test code; determining whether or not the corresponding user test code is stored, with respect to each condition or operation; and retrieving the user test code appropriate to the condition or the operation when determining that the corresponding user test code is stored, and retrieving the predetermined test code appropriate to the condition when determining that the user test code corresponding to the condition or the operation is not stored, and generating a test code on the basis of the retrieved user test code or the predetermined test code.

Description

  The present invention relates to a technique for generating a test code for a software program to be tested.

In the test process in software system development, a unit test for checking the validity of conditional branching and input / output is performed for each software program constituting the software system. Patent Documents 1 and 2 describe a technique for automating such a test.
FIG. 9 is a diagram illustrating a data example of a decision table (decision table) in which conditions and operations for a software program to be tested are associated with each other. In this decision table, preconditions and input values indicating conditions are associated with expected results indicating actions according to the conditions, and a test for checking the validity of input / output is performed for each column of test cases. It is shown that. For example, in the test case “1”, when the value of the variable “cnt” of the integer type “int” as an argument is “1”, the Boolean type “ The expected result is that the value of the “boolean” variable “actual” is false. Here, the value of the argument indicated in the input value is substituted to execute the test target method, and a default test code for determining whether the return value is the value indicated in the expected result is described and stored in advance. The test code can be automatically generated by replacing variables and values included in the default test code with values shown in the decision table. FIG. 10 is a diagram illustrating an example of a test code generated based on such a determination table and a predetermined test code. A test code for assigning a value to a variable is indicated at a symbol a, and a test code for executing a function to be tested with a variable assigned a value as an argument is indicated at a symbol b. A test code for inspecting a return value of the method executed by the symbol b is shown at a position c.

JP-A-5-342054 Japanese Patent Laid-Open No. 10-207727

  However, there are cases where conditions and operations to be tested are complicated, and it is difficult to previously store predetermined test codes corresponding to all conditions and operations. For example, there is a case where a test file in which a value used for a test is stored as an input value is read, and a test is performed by substituting the value included in the read test file as an argument. It is difficult to predetermine and store a test code corresponding to such a situation. In addition, depending on the specifications of the programming language of the software program to be tested, it may be necessary to describe the test code uniquely. Therefore, it is desirable to generate test codes according to various test cases intended by the user based on the decision table.

  The present invention has been made in view of such a situation, and a test code generation device, a test code generation method, and a test code generation program for generating a test code corresponding to a test case intended by a user based on a decision table I will provide a.

  In order to solve the above-described problem, the present invention stores a decision table including a plurality of test cases in which conditions in processing of a software program to be tested are associated with operations corresponding to the conditions. A determination table storage unit, a default test code storage unit in which a default test code corresponding to a condition or operation is stored in advance, and a user test code in which a user test code corresponding to the condition or operation input from the user is stored A storage unit, an input unit that accepts input of a user test code, stores the input user test code in the user test code storage unit, and a user test code corresponding to the condition or operation for each condition or operation is a user test code The determination unit that determines whether or not the data is stored in the storage unit, and the determination unit corresponds to the condition or the operation. When it is determined that the user test code is stored in the user test code storage unit, the user test code corresponding to the condition or operation is read from the user test code storage unit, and the user test code corresponding to the condition or operation is the user test code Test code generation that reads the default test code corresponding to the condition or operation from the default test code storage unit and generates the test code based on the read user test code or the default test code when it is determined that it is not stored in the storage unit A test code generating device.

  Further, according to the present invention, when the determination unit associates predetermined identification information with the condition or operation in the determination table, the user test code corresponding to the condition or operation is stored in the user test code storage unit. It is characterized by determining that it is.

  In the present invention, the decision table storage unit stores a plurality of different decision tables for each test target, and the user test code storage unit stores an internal code that is a user test code corresponding to each of the plurality of decision tables. Definition information and external code definition information, which is user test code used in common for multiple decision tables, are stored, and the test code generator includes user test code corresponding to conditions or actions in internal code definition information If the user test code included in the internal code definition information is not included in the internal code definition information, the user test code included in the external code definition information is read out. It is characterized by reading.

  In the present invention, the above-described user test code includes a predetermined first character string, and the determination table includes a second character string that replaces the first character string. The test code generation unit generates a test code in which the first character string included in the user test code is replaced with the second character string.

  Further, the present invention provides a decision table storage unit that stores a decision table including a plurality of test cases in which conditions in processing of a software program to be tested and operations corresponding to the conditions are associated with each other. Alternatively, a default test code storage unit in which a default test code corresponding to an operation is stored in advance, and a user test code storage unit in which a user test code input from a user and corresponding to a condition or an operation is stored are provided. A test code generation method for a test code generation device that accepts input of a user test code, stores the input user test code in a user test code storage unit, and corresponds to the condition or operation for each condition or operation A step for determining whether or not a user test code to be stored is stored in the user test code storage unit. If the user test code corresponding to the condition or operation is determined to be stored in the user test code storage unit, the user test code corresponding to the condition or operation is read from the user test code storage unit and When it is determined that the corresponding user test code is not stored in the user test code storage unit, the default test code corresponding to the condition or operation is read from the default test code storage unit, and based on the read user test code or default test code And a step of generating a test code.

  Further, the present invention provides a decision table storage unit that stores a decision table including a plurality of test cases in which conditions in processing of a software program to be tested and operations corresponding to the conditions are associated with each other. Alternatively, a default test code storage unit in which a default test code corresponding to an operation is stored in advance, and a user test code storage unit in which a user test code input from a user and corresponding to a condition or an operation is stored are provided. The computer of the test code generation device accepts input of a user test code, stores the input user test code in the user test code storage unit, and a user test code corresponding to the condition or operation for each condition or operation A step for determining whether or not it is stored in the user test code storage unit, and a condition When it is determined that the user test code corresponding to the operation is stored in the user test code storage unit, the user test code corresponding to the condition or operation is read from the user test code storage unit, and the user test corresponding to the condition or operation is read If it is determined that the code is not stored in the user test code storage unit, the default test code corresponding to the condition or operation is read from the default test code storage unit, and the test code is determined based on the read user test code or the default test code. A test code generating program for executing the generating step.

  As described above, according to the present invention, the determination table in which the condition of the software program to be tested and the corresponding operation are associated, the default test code corresponding to the condition or the operation, and the condition or the operation are supported. The user test code to be stored, the input user test code is stored in the user test code storage unit, it is determined whether or not the corresponding user test code is stored for each condition or operation, and the corresponding user If it is determined that the test code is stored, the user test code corresponding to the condition or operation is read. If it is determined that the user test code corresponding to the condition or operation is not stored, the test code is determined according to the condition or operation. Read the default test code and based on the read user test code or default test code Since so as to generate the test code, the test code in response to a variety of test cases can be generated based on the decision table.

It is a block diagram which shows the structural example of the test code production | generation apparatus by one Embodiment of this invention. It is a figure which shows the example of the template of the determination table by one Embodiment of this invention. It is a figure which shows the example of data of the determination table by one Embodiment of this invention. It is a figure which shows the example of data of the user test code by one Embodiment of this invention. It is a figure which shows the example of data of the class designation | designated table by one Embodiment of this invention. It is a figure which shows the example of data of the test code by one Embodiment of this invention. It is a flowchart which shows the operation example of the test code generation apparatus by one Embodiment of this invention. It is a figure which shows the example of data of the setting file which defines the information regarding the code definition by one Embodiment of this invention. It is a figure which shows the example of data of the determination table by a prior art. It is a figure which shows the example of the test code produced | generated by a prior art.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a test code generation device 100 according to the present embodiment. The test code generation device 100 is a computer device that generates a test code for testing a software program to be tested, and includes a decision table generation unit 110, an input unit 120, a storage unit 130, a determination unit 140, and a test code. And a generation unit 150. The test code generation function provided by the test code generation apparatus 100 according to the present embodiment can be implemented as an add-on to a software integrated development environment, for example.

  The decision table generator 110 generates a decision table for testing the software program that is the test target. For example, the decision table generation unit 110 stores a determination table template in its own storage area in advance. FIG. 2 is a diagram illustrating an example of a determination table template stored in the determination table generation unit 110. The decision table includes information for identifying the class and method to be tested. In this example, the decision table includes a “test target class” column indicating the name of the software program to be tested and a “test target method” column indicating the function of the software program to be tested. Here, in order to explain an example in which the software program to be tested is described in JAVA (registered trademark), which is an object-oriented programming language, the unit to be tested is shown as a class or method. Type programming languages can also be tested. In this case, for example, the test target can be a file name or a function name. In the decision table, preconditions and input values indicating conditions are associated with expected values indicating actions according to the conditions, and a test for checking the validity of input / output is performed for each column of test cases. It is shown that. Such a determination table is stored as a sheet in a file generated by spreadsheet software, for example.

  Further, the decision table generation unit 110 copies such a determination table template in response to a request from the user, generates a determination table for each class and method to be tested, and stores the determination table in the storage unit 130. Stored in the unit 131. Here, the decision table generator 110 reads, for example, a software program that is a unit test target from an external storage unit, analyzes the software program, reads information such as a test target class name, method name, argument, return value, and the like. Information can be added to the object, element, and value in the table and stored in the decision table generation unit 110.

  The input unit 120 includes an input device such as a keyboard and a mouse, and receives input of information from the user. For example, the input unit 120 accepts input of additional information to the decision table and stores it in the decision table storage unit 131 or accepts input of a user test code described later, and stores the input user test code in the user test of the storage unit 130. Or stored in the code storage unit 133.

The storage unit 130 includes a determination table storage unit 131, a default test code storage unit 132, a user test code storage unit 133, and a class designation table storage unit 134, and stores various types of information for test code generation. Is done.
The decision table storage unit 131 stores a decision table including a plurality of test cases in which conditions in processing of a software program to be tested are associated with operations corresponding to the conditions. The decision table is generated by the decision table generation unit 110, and information input from the user to the input unit 120 is added and stored in the determination table storage unit 131. The decision table storage unit 131 stores a plurality of decision tables that are different for each test target such as a class and a method. FIG. 3 is a diagram illustrating a data example of the decision table stored in the decision table storage unit 131. In the decision table, a test operation and a condition are associated with each block of the precondition, the input value, and the expected result. Based on such a determination table, a test code is generated by a test code generation unit 150 described later.

  Here, the test code is conventionally generated based on the information included in the decision table and the default test code stored in the default test code storage unit 132, but the default test corresponding to all of the various test cases. It is difficult to store the code in the default test code storage unit 132 in advance. Therefore, in the present embodiment, the items associated with the predetermined code type identification information in the decision table are not the default test codes stored in the default test code storage unit 132 but the user test code storage unit 133. A test code is generated based on the user test code stored in. For example, in this example, “#” is associated with the cell in the second column as the code type identification information. Further, in the decision table stored in the decision table storage unit 131, the block associated with the code type identification information is replaced with a block that is replaced when indicated by the notation defined in the user test code. And a second character string that replaces the first character string indicated by the notation. Here, “class” and “data” that are the first character strings are associated with the “element” item, and “MyBean” and “AMD0021” that are the second character strings are associated with the “value” item. Are associated with each other.

  In the default test code storage unit 132, a default test code corresponding to the condition or operation included in the determination table is stored in advance. The default test code has the same structure as before.For example, the test code that assigns the argument included in the decision table to the variable or the return value that executed the method that is the test target is the expected result included in the decision table. This is a test code or the like for determining whether or not it matches the return value shown.

  The user test code storage unit 133 stores a user test code input from the user and corresponding to the condition or operation in the decision table. FIG. 4 is a diagram illustrating an example of user test code data stored in the user test code storage unit 133. The user test code storage unit 133 stores a key name, a user test code, an import sentence, and a comment in association with each other. The key name is an item corresponding to “target” in the determination table, and is information for identifying the corresponding user test code. The user test code is inserted at a predetermined location in the generated test code. The import statement indicates a class necessary for executing the corresponding user test code. The comment is a comment explaining the corresponding user test code.

  In this example, for example, in the first line, the character string “ListObjectGeneration” is associated with the item “target” in the input value in the decision table, and information using this character string as a key name is stored. . Here, the user test code includes character strings such as “$ {data}” and “$ {class}”. This is an item that can be changed by designating in the decision table, and is a first character string indicated by a predetermined notation. Here, the part from “$ {” to “}” in the user test code is replaced with a value corresponding to the character string surrounded by “$ {” to “}” in the decision table. For example, since “MyBean” (second character string) is associated with “class” (first character string) in the decision table, “List <$ {class}>” is described in the user test code. This place is replaced with “List <MyBean>”. Such replacement processing is performed by the test code generation unit 150 at the time of test code generation. Here, the user test code is shown in a table format as shown in the figure. If the determination table is a sheet in a spreadsheet file, the user test code may be stored as a separate sheet in the same file.

  The class designation table storage unit 134 stores a class designation table that is information regarding the test code to be inserted in the test code other than the precondition, the input value, and the expected result. FIG. 5 is a diagram illustrating a data example of the class designation table stored in the class designation table storage unit 134. Here, for example, a key name for identifying the user test code to be inserted is associated with each block such as “outside class”, “class member”, and “setUp”. The user test code corresponding to the key name is stored in the user test code storage unit 133. The class specification table may also be stored as a separate sheet of the same file if the decision table is a sheet in a spreadsheet software file.

  For each condition or operation in the decision table, the determination unit 140 determines whether a user test code corresponding to the condition or operation is stored in the user test code storage unit 133. For example, when the predetermined code type identification information is associated with the condition or action block in the decision table, the determination unit 140 stores the user test code corresponding to the condition or action in the decision table storage unit 131. It is determined that it is stored.

  The test code generation unit 150 generates a test code based on the information stored in the storage unit 130. Here, when the determination unit 140 determines that the user test code corresponding to the condition or operation in the determination table is stored in the user test code storage unit 133, the test code generation unit 150 responds to the condition or operation. If the user test code is read from the user test code storage unit 133 while the determination unit 140 determines that the user test code corresponding to the condition or operation is not stored in the user test code storage unit 133, the condition Alternatively, the default test code corresponding to the operation is read from the default test code storage unit 132. The test code generation unit 150 generates a test code based on the read user test code or default test code, and stores the generated test code in its own storage area. At this time, if the first character string is included in the user test code, the test code generation unit 150 generates a test code in which the first character string is replaced with the second character string. The test code generation unit 150 outputs the generated test code to, for example, a test execution tool.

  FIG. 6 is a diagram illustrating an example of test code data generated by the test code generation unit 150. An import sentence is described at a position indicated by a symbol a. A user test code designated as an item “out of class” in the class designation table is inserted at a location indicated by a symbol b. A test class for executing a test is described at a position indicated by reference sign c. A user test code designated as an item of “class member” in the class designation table is inserted at a position indicated by a symbol d. The user test code specified in the item “setUp” in the class specification table is inserted at the location indicated by the symbol e.

  A user test code designated in the item “input value” in the determination table is inserted at a position indicated by a symbol f. A predetermined test code is inserted at a position indicated by a symbol g, and an executable statement of a test target method is described. A predetermined test code is inserted at a position indicated by a symbol h, and a determination sentence of an expected result is described. A user test code designated in the item “expected result” in the decision table is inserted at a position indicated by a symbol i. By executing such a test code, it is possible to perform a test according to the user's intention.

Next, an operation example of the test code generation device 100 according to the present embodiment will be described with reference to the drawings. FIG. 7 is a flowchart illustrating an operation example of the test code generation device 100 according to the present embodiment.
The decision table generation unit 110 generates a decision table by copying the decision table template stored in its own storage area, and stores it in the decision table storage unit 131. In response to the operation request from the user, the test code generation device 100 reads the determination table stored in the determination table storage unit 131 and displays the determination table on the display (step S1). The input unit 120 receives an input of code type identification information (#) from a user for a portion in the determination table where a test using a user test code is desired to be executed (step S2).

  Further, the input unit 120 accepts input of a user test code for the block in which the code type identification information is input in step S2, and stores it in the user test code storage unit 133 (step S3). Further, the input unit 120 receives an input for the class specification table and stores it in the class specification table storage unit 134 (step S4). Similarly, the input unit 120 receives an input of a user test code for the portion where the code type identification information is input to the class designation table in step S4, and stores it in the user test code storage unit 133 (step S5).

  When a test code generation request is input from the user to the input unit 120, the test code generation unit 150 starts generating a test code (step S6). First, the test code generation unit 150 associates the class specification table stored in the class specification table storage unit 134 with the key name indicated in the class specification table and stores the user stored in the user test code storage unit 133. Read the test code. The test code generation unit 150 inserts the user test code at the corresponding position of the block shown in the class specification table (step S7).

  The test code generation unit 150 generates a test code for each test case included in the determination table (step S8). The test code generation unit 150 determines whether or not the code type identification information is associated with each block of the determination table (step S9). When the test code generation unit 150 determines that the code type identification information is associated (step S9: YES), the user test code stored in the user test code storage unit 133 in association with the corresponding key name And import statements and comments and insert them into the test code. If the first character string defined in the user test code is included, the second character string is read from the decision table and replaced (step S10).

  On the other hand, if it is determined in step S9 that the code type identification information is not associated (step S9: NO), the corresponding default test code is read from the default test code storage unit 132 and inserted into the test code (step S11). . If the test code generation unit 150 has not generated test codes corresponding to all the test cases (step S12: NO), the test code generation unit 150 returns to step S8. If test codes corresponding to all test cases are generated (step S12: YES), the process is terminated.

  In the present embodiment, an example is shown in which the user test code for a specific decision table is stored in the user test code storage unit 133. However, for example, user test codes that are commonly used for a plurality of decision tables are defined. You can also. In this case, the user test code storage unit 133 includes an internal code definition table that is a user test code corresponding to each of a plurality of decision tables, and an external code definition that is a user test code commonly used for the plurality of decision tables. A table is stored. In other words, in addition to the internal code definition table that defines the user test code to be used for a single decision table, the external code definition table that defines the test code that is commonly used in a package that includes multiple classes is pre-user-tested The data is stored in the code storage unit 133.

  Then, if a user test code corresponding to the condition or action included in the determination table is included in the internal code definition table, the test code generation unit 150 reads the user test code included in the internal code definition table and determines If the user test code corresponding to the condition or operation included in the table is not included in the internal code definition table, the user test code included in the external code definition table is read. That is, when the code type identification information is described in the user definition table stored in the decision table storage unit 131, the test code generation unit 150 first reads the internal code definition table, and the corresponding user test code is the internal code. It is determined whether it is included in the definition table. If the user test code is included in the internal code definition table, the user test code is read and inserted into the test code. If the user test code is not included in the internal code definition table, the external code definition table is read, and the corresponding user test code is read and inserted into the test code.

  Thus, when the same key name exists in the internal code definition table and the external code definition table, the user test code stored in the internal code definition table is preferentially applied. That is, even if it is desired to use a user test code with the same key name for a plurality of classes included in the same package, there are cases where it is desired to use a different user test code only for a specific class. Here, it is possible to use only the external code definition table and not use the internal code definition table. In this case, even if the user test code corresponding to the key name is stored in the internal code definition table, the user test code is not read from the internal code definition table, but is read from the external code definition table and inserted into the test code. To do. FIG. 8 is a diagram illustrating an example of data in a setting file that defines information regarding a code definition to be used. The path of the code a and the code b shows the path of the external code definition table, and the code c shows information that determines whether or not the internal code definition table can be used.

  As described above, according to this embodiment, when a predetermined default test code exists, a test code is generated as usual based on the default test code, and the code type identification information is entered from the user. For the blocks, the test code is generated based on the user test code stored in the user test code storage unit 133. As a result, even when it is desired to test the software program by an operation different from the default test code, the determination table and the user test code can be stored in the storage unit 130 to perform the test according to the operation intended by the user. It becomes possible. In addition, when the test code generation device 100 wants to insert the same user test code for a plurality of test cases, the test code generation device 100 reads out the user test code from the user test code storage unit 133 and creates different test cases. Automatically insert the same test code. For this reason, the user can easily generate a test code by describing necessary information in the decision table and the user test code without repeatedly describing the same test code for each test case in the test code. . As described above, according to the test code generation device 100 of the present embodiment, a complicated test code that has been created by a conventional programmer can be automatically generated, so that the number of steps in the test process can be reduced.

  A program for realizing the function of the processing unit in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to generate a test code. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 100 Test code production | generation apparatus 110 Determination table production | generation part 120 Input part 130 Storage part 131 Determination table storage part 132 Default test code storage part 133 User test code storage part 134 Class definition table storage part 140 Determination part 150 Test code generation part

Claims (6)

A decision table storage unit that stores a decision table including a plurality of test cases in which conditions in processing of a software program to be tested and operations corresponding to the conditions are associated;
A default test code storage unit in which a default test code corresponding to the condition or the operation is stored in advance;
A user test code storage unit in which a user test code corresponding to the condition or the operation input from a user is stored;
An input unit that receives input of the user test code and stores the input user test code in the user test code storage unit;
A determination unit that determines whether or not the user test code corresponding to the condition or operation is stored in the user test code storage unit for each of the condition or the operation;
When the determination unit determines that the user test code corresponding to the condition or operation is stored in the user test code storage unit, the user test code corresponding to the condition or operation is stored in the user test code storage If the user test code corresponding to the condition or operation is not stored in the user test code storage unit, the default test code corresponding to the condition or operation is determined as the default test code storage unit. A test code generation unit that generates a test code based on the read user test code or the default test code,
A test code generation device comprising: The determination unit stores the user test code corresponding to the condition or operation in the user test code storage unit when predetermined identification information is associated with the condition or the operation in the determination table. The test code generation device according to claim 1, wherein the test code generation device is determined to be performed. The decision table storage unit stores a plurality of the decision tables different for each test target,
The user test code storage unit includes internal code definition information that is a user test code corresponding to each of the plurality of decision tables, and external code definition information that is a user test code commonly used for the plurality of decision tables. Is remembered,
The test code generation unit reads the user test code included in the internal code definition information if the user test code corresponding to the condition or operation is included in the internal code definition information, The test code generation according to claim 1 or 2, wherein if the corresponding user test code is not included in the internal code definition information, the user test code included in the external code definition information is read out. apparatus. The user test code includes a predetermined first character string,
The determination table includes a second character string that replaces the first character string,
The test code generation unit generates the test code by replacing the first character string included in the user test code with the second character string. The test code generation device according to any one of the above. A decision table storage unit storing a decision table including a plurality of test cases in which conditions in processing of a software program to be tested and operations corresponding to the conditions are associated; and the conditions or the operations A test comprising a default test code storage unit in which a corresponding default test code is stored in advance, and a user test code storage unit in which a user test code input from the user and corresponding to the condition or the operation is stored A test code generation method for a code generation device, comprising:
Receiving an input of the user test code, and storing the input user test code in the user test code storage unit;
For each condition or operation, determining whether the user test code corresponding to the condition or operation is stored in the user test code storage unit;
When it is determined that the user test code corresponding to the condition or operation is stored in the user test code storage unit, the user test code corresponding to the condition or operation is read from the user test code storage unit, When it is determined that the user test code corresponding to the condition or operation is not stored in the user test code storage unit, the default test code corresponding to the condition or operation is read from the default test code storage unit and read Generating a test code based on the user test code or the default test code;
A test code generation method comprising: A decision table storage unit storing a decision table including a plurality of test cases in which conditions in processing of a software program to be tested and operations corresponding to the conditions are associated; and the conditions or the operations A test comprising a default test code storage unit in which a corresponding default test code is stored in advance, and a user test code storage unit in which a user test code input from the user and corresponding to the condition or the operation is stored In the computer of the code generator,
Receiving an input of the user test code, and storing the input user test code in the user test code storage unit;
For each condition or operation, determining whether the user test code corresponding to the condition or operation is stored in the user test code storage unit;
When it is determined that the user test code corresponding to the condition or operation is stored in the user test code storage unit, the user test code corresponding to the condition or operation is read from the user test code storage unit, When it is determined that the user test code corresponding to the condition or operation is not stored in the user test code storage unit, the default test code corresponding to the condition or operation is read from the default test code storage unit and read Generating a test code based on the user test code or the default test code;
Test code generation program that executes

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