JPS63182752A - System for supporting single unit test capable of preserving result - Google Patents

Abstract

PURPOSE:To effectively perform the single unit test of a program module without producing any pseudo module by securing such a mechanism where the value of a parameter variable can be set and changed via a terminal as necessary. CONSTITUTION:An external reference series file 12 records the information transferred to a test operator and substitutes a terminal equipment 11 later when the same test is carried out again. A module calling pseudo means 10 displays the value of a calling parameter variable on the equipment 11 when the statement which calls out another program module is interpreted. Then an unset variable input means 9 changes the value of a field corresponding to the relevant parameter variable set within a variable allocation area 7 when the change is instructed from the equipment 11 for the value of said calling parameter variable or the file 12 contains the parameter change instruction data. In such a way, the productivity is improved without producing any pseudo module.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program test support system, and particularly to a support system for easily performing unit tests of program modules.

[Conventional technology]

Normally, a program is composed of a plurality of modules, and each module performs a predetermined function by exchanging control with each other. When developing a program, before testing the entire program, a unit test is performed for each individual module to confirm whether or not the module is performing a predetermined function.

Traditionally, when performing a unit test, you test a module that has a direct interface with the module being tested, that is, a module that calls that module, a module that is called from it, and a value for the external data referenced by that module. Regarding the module being set, I created a simple test module that simulates it, separate from the original module.

[Problem that the invention seeks to solve]

The conventional unit testing method described above has the disadvantage of reducing productivity because it requires creating a pseudo module for testing purposes in addition to the original module incorporated into the program being developed.

Pseudo-modules are relatively easy to create, as they only need to simulate the interface with the module under test, compared to the original modules, but if there are many modules that make up a large-scale program, , the effort to prepare them cannot be ignored.

Furthermore, if you try to easily create a pseudo module, the behavior it simulates will become formulaic, which will limit the test patterns for unit tests. On the other hand, if one attempts to simulate various test patterns, a great deal of effort is required to create pseudo mods, which significantly reduces productivity.

[Means for solving problems]

The system of the present invention includes: a source program file in which a source program is stored; an intermediate language converter that converts the source program into an intermediate language in a format that is easy to interpret and execute; and an intermediate language file that stores the intermediate language. 1 to be executed next from among the program statements stored in the intermediate language file
Execution statement selection means for selecting a statement; Variable state determination means for checking whether the value selected by this execution statement selection means and referenced by the 91 statement has already been set; and Variable state determination means for determining the variable Kf[ When it is determined that the variables are not set, the variable allocation for determining the area to store the unset variables is a means, the variable allocation for retaining these variables during program execution is an area, and the above. Variable assignment is done by means. Necessary variable assignment is later done between an interpretation execution means that interprets the statement and simulates its execution, a terminal device that interactively exchanges information with the tester, and the tester. Record the exchanged information and create an external reference series file that can be used as a substitute for the terminal device when re-running the same test at a later date, and when referencing an unset variable, store the value in at least one of the terminal device and the external reference series file. prompt for input,
(The above variable assignment is done by means) The above variable assignment is performed by an unset variable input means that stores the value in a field reserved in advance in the area, and a call parameter variable when a statement that calls another program module is interpreted and executed. If the value of the parameter variable is displayed on the terminal device and the value of the parameter variable is instructed by the terminal device, or if there is parameter change instruction data in the external reference series file, the variable assignment is made to the parameter variable in the area. It has mosier call pseudo means for changing the value of the corresponding field.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1, one embodiment of the present invention includes a source program file l, intermediate language conversion means 2, intermediate language file 3, execution statement selection means 4, variable state determination means 5, and variable allocation. means 6, variable assignment area 7, interpretation execution means 8, undefined variable input means 9,
Mosier calling pseudo means 10, terminal device 11,
It is composed of an external reference series file 12.

Referring to FIGS. 2A and 2B, as an example of the intermediate language of the present invention, the general form of one program statement is shown in FIG. 2A, the number of operands being determined by keywords. FIG. 2B shows an example of the intermediate language of the program statement rA=B+c"j. The example shown in FIG. 2B is to assign the sum of variables B and C to variable A, and " 1” pin the keyword
ary is a code indicating that the variable is a binary number.

Referring to Figure 3, the variable assignments shown in Figure 1 are in area 7.
An example of the configuration is shown, and consists of a variable name table 31 and a variable value storage area 32.

Next, the overall operation of this embodiment will be specifically explained.

Referring to FIG. means 6, variable assignment area 7; interpretation execution means 8; undefined variable input means 9; A terminal device connected via a line.

The intermediate language conversion means 2 inputs one program module stored in the source program file 1, converts it into an intermediate language as shown in Figure 2 or Figure 2B, and outputs it to the intermediate language file 3.

The execution statement selection means 4 selects the statement to be executed first from among the intermediate language format program statements stored in the intermediate language file 3. The variable state determination means 5 selects the statement to be executed first. For variable assignment, it is checked whether there is an entry with the same variable name in the variable name table 31 in the area 7. If not, it means that the variable 1alC has been referenced for the first time, so variable assignment passes control to means 6.

Variable allocation means 6 registers the variable name in the variable table, searches for an empty area in the variable value storage area 32, and stores the variable value therein along with its length.

This free area is managed by providing a pointer indicating the start of the free area at the beginning of the variable storage area 32 and updating the pointer every time a variable is registered.

A pointer is placed from the variable table to the field that stores the variable value.

The interpretation and execution means 8 then simulates the program statement according to the content of the intermediate language.

When the statement refers to a variable d for the first time in the program, one of two things will happen if the statement is a read reference.

(a) Reference to external variables including parameters to which other mosier values are set Φ) Due to a program error, values were not set in variables that should have been set in advance.

In either case, the value of the variable is obtained by the undefined variable input means 9, and the value is stored in a variable field reserved in advance in the area 7 for variable assignment. The undefined variable input means 9 may obtain variable values from the terminal device 11 or from the external reference series file 12. In the former case, a message prompting the user to input the value of the variable is displayed on the terminal device 11, and the value is input in response. At the same time,
The value is recorded in the external reference series file 12.

In the latter case, the value is obtained by reading the value recorded in the external reference series file 12 using the above method when a test was previously performed. When the execution statement is an instruction to call another module, the module calling pseudo means 10 operates and all parameter variables are displayed on the terminal device 11 (C).

The tester can visually check it and, if necessary, simulate the called module by changing the values of the parameter variables.

In this case as well, the parameter variable change instructions from the terminal [11] are recorded in the external reference series file 12, and if the same test is to be performed later, the change instructions can be read from that file to reduce terminal operations. .

In order to record data in the external reference series file 12, in addition to variable value data, a sequential number indicating whether the external reference occurred in the first instance in this module unit test and the statement making the external reference are recorded. It is conceivable to record the line numbers together. As a result, when the unvariable input means 9t or the module call pseudo means 10 inputs variable values from the external reference series file 12, the sequential number or number of the external reference to be processed and the variable value data in the file By checking whether the line numbers or both match, correspondence with the program under test can be guaranteed.

For example, if it is desired to check for complete correspondence between the program under test and the stored data, both the sequential number and the line number are checked.

In addition, if the program has been modified since the last test, only one check will be performed depending on the modification method, reducing terminal operations.6 For example, if a modification does not involve an increase or decrease in external references, only the sequential numbers will be checked. If you do so, you can use the saved data as is. In addition, if the modification is done in a way that does not change the line number, even if the number of external references increases or decreases, the saved data will only be used for those that match, and the variable values will be obtained from the terminal device 11 for those that do not match. Make stored data available.

When the interpretation and execution of one statement is completed, the execution statement selection means 4 is activated again and selects the next statement to be executed according to the program sequence.
The execution is repeated sequentially in the same manner.

〔Effect of the invention〕

The present invention has the effect that, for a system that interprets and executes a program, by displaying program statement parameter variables on a terminal, a tester cannot confirm the validity of the values. In addition, by incorporating a mechanism that allows parameter variable values to be set/changed from the terminal as necessary, unit tests of program modules can be performed using a wide variety of test cases without creating pseudo modules. This can be done effectively, and by saving and reusing the terminal operations for testing as described above, there is an effect that even more efficient testing can be performed.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIGS. 2A and 2B are diagrams showing an example of an intermediate language format used in the present invention, and FIG. 3 is a diagram showing an example of the intermediate language format used in the present invention. FIG. 2 is a diagram showing an example of a configuration. In Figures 1 to 3, 1... source program file, 2... old intermediate language conversion means, 3...
. . . Intermediate language file, 4 . . . Execution statement selection means, 5 . . . Variable status determination means,
6... Variable assignment is means, 7... Variable assignment is area, 8... Interpretation execution means, 9...
・Undefined variable input means, lO...Mosier call pseudo means, 11...Terminal device, 12...
...External reference series file, 31...Variable name '151 Side question? Figure A 25th

Claims (1)

[Claims] One of the program statements to be executed next from a group of intermediate language program statements in a format that makes it easy to interpret and execute the source program.
Execution statement selection means for selecting a statement; Variable state determination means for checking whether the value of data referred to by one statement selected by this execution statement selection means has already been set; a variable allocation means for determining an area to store unset variables when it is determined that a value has not been set; a variable allocation area for holding these variables during program execution; and the variable allocation means. an interpretation execution means that interprets the statement and simulates its execution after assigning necessary variables, a terminal device that interactively exchanges information with the test person, and information exchanged with the test person. When re-running the same test at a later date, enter the value into an external reference series file that will replace the terminal device, and when referencing an unset variable, enter the value into at least one of the terminal device and the external reference series file. request,
unset variable input means for storing the value in a field reserved in advance in the variable allocation area by the variable allocation means; If the terminal device instructs to change the value of the parameter variable, or if there is parameter change instruction data in the external reference series file, the field corresponding to the parameter variable in the variable allocation area will be displayed. A unit test support system for a program module capable of saving test results, characterized by including a module call pseudo means for changing values.