Softwaretesting 07 eng

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　　 [7] ホワイトボックステス
ト演習
Software Testing
[7] White Box Testing Exercise & Seminar
あまん ひろひさ ひろひさ

阿萬 裕久 裕久（ AMAN

Hirohisa ）

(C) 2007-2022 Hirohisa AMAN

1


Exercise purpose
 Perform White Box Testing of the progra
m to experience and learn the importan
ce of software testing together with blac
k box testing
 Main contents





Checking instruction coverage using tools
Create a program according to specifications
Testing by others
Correction of the program

(C) 2007-2022 Hirohisa AMAN

2


Exercise content
 Exercise 1
Consider test cases for the given program (wit
h bugs) and check the instruction coverage (u
sing tools)

 Exercise 2
Create a prog ram according to the g iven speci
fications
and,
Have others test your prog ram
Modify the prog ram if any defects are found
(C) 2007-2022 Hirohisa AMAN

3


Using the file in
[5] Exercise

Exercise 1

Download from
Teams

[Test target] ex0501.c
① Run the test case created in [5] Exerci Exerci
se-1 (test-report0501.xlsx) to che
ck the instruction coverage with the t
ool, fill in test-report0701.xlsx
② If the instruction coverag e is not 10
0%, add more test cases (also add to
test-report0701.xlsx)
(C) 2007-2022 Hirohisa AMAN

4


Tools used in Exercise 1
 Use a tool (program) called g cov
 This is usually installed with g cc
 This tool examine the source and exec
utable files compiled with gcc and Rec
ord how many times each instruction is
executed

(C) 2007-2022 Hirohisa AMAN

5


g cov Usag e flow (1/7)
① First, compile the program with gcc
　 however, add the option -coverage

gcc –coverage ex0501.c
② Then, run the program and test the first
test case
For example
• Parking time = 10
• Purchase = 0
(C) 2007-2022 Hirohisa AMAN

6


The instruction coverag e
rate is slig htly different
in Mac

g cov Usag e flow (2/7)

③ Next, use the gcov command to analyze
the execution result and map it with the s
Instruction
ource program
Coverag e is
displayed
(73.53%)

gcov ex0501.c
File 'ex0501.c'
Lines executed: 73.53% of
34
Creating ‘ex0501.c.gcov'

A file called
ex0501.c.gcov is created
that records the details
(C) 2007-2022 Hirohisa AMAN

7


Slig htly different in Mac

g cov Usag e flow (3/7)
④ Take a look at ex0501.c.gcov
Number of executions

Focus
on this

Below is
the
content
of the
prog ram

(C) 2007-2022 Hirohisa AMAN

8


Slig htly different in Mac

g cov Usag e flow (4/7)
Instruction Coverage Information

symbo
l

meaning

-

does not count as an instruction

numbe total number of executions of
rs
the line
#### not executing that line
#
(C) 2007-2022 Hirohisa AMAN

9


Slig htly different in Mac

g cov Usag e flow (5/7)
⑤ Next, run the second test case
For example
Parking time = -10 (to make an error)

⑥ Check with gcov again

gcov ex0501.c
File 'ex0501.c'
Lines executed: 79.41% of
34
Creating 'ex0501.c.gcov'
(C) 2007-2022 Hirohisa AMAN

The instruction
coverag e is
increasing
(73.53%→79.41%)79.41%)

10


Slig htly different in Mac

g cov Usag e flow (6/7)
⑦ View the contents of ex0501.c.gcov agai
n
The number of
executions has been
increased to 2

This part
is also
changing

(C) 2007-2022 Hirohisa AMAN

11


g cov Usag e flow (7/7)
 By repeating ⑤ to ⑦ , instruction covera
g e g radually increase (Note that is cum
ulative, However, the instruction covera
ge rate increases differs depending on t
he test cases.
[Note!] Exerci
If you recompile with gcc, the count of
executions will be reset, so be very careful

(C) 2007-2022 Hirohisa AMAN

12


test-report0701.xlsx

Test results in Exercise 1

A column for "Statement Coverag e" has been added to the
sheet of Exercise 1 of the 5th lession.
Copy the contents created in Ex1 of 5th lesson (testreport0501.xlsx) and fill in the instruction coverag e rate in
order from top to bottom.
Add test cases if it is not 100%
(chang e the color so that you can see the added line)
(C) 2007-2022 Hirohisa AMAN

13


Submission of Exercise 1
 Submit to Teams
test-report0701.xlsx

[7] Exercise-1 (white box testing)
 Submission deadline: Tomorrow (Apr.
11) 13:00 (Vietnam time)
　　　　　　　　　　
(C) 2007-2022 Hirohisa AMAN

14


Exercise 2
 Complete the ex0702.c program
(prog ram specification spec0702.pd
f)
 Test your prog ram with others
ex0702.
c
program
C

Student A.
test results

Student B.

test-report0702.xlsx
(C) 2007-2022 Hirohisa AMAN

15


Steps of Exercise 2 (1/2)

Included in ex7materials.zip but
incomplete

 1. Make your own program ex0702.c ac
cording to specification spec0702.pdf
 2. Ask another student to test your progr another student to test your prog r
am
2-1) Fill in your name and tester’s name
on test-report0702.xlsx.
2-2) Send your ex0702.c and test-report
0702.xlsx to the tester.
(C) 2007-2022 Hirohisa AMAN

16


Steps of Exercise 2 (2/2)
 3. Test the program, enter the result into
test-report0702.xlsx, and return it to the
program creator.

 4. The prog rammer check another student to test your progrs the test result
s, corrects the prog ram if there is a bug , a
nd runs the test ag ain.
 5. The prog ram author submits the final v
ersion of ex0702.c and test-report0702.xl
sx to Teams.
(C) 2007-2022 Hirohisa AMAN

17


Submission of Exercise 2
 Submit to Teams
 ex0702.c (final version)
 test-report0702.xlsx

[7] Exercise-2 (white box testing)

 Submission deadline: Apr.17, 13:00 (VN)
yourself

C

ex0702.c

program
Student A.

test results

Student B.

test-report0702.xlsx
(C) 2007-2022 Hirohisa AMAN

18


In the next lecture, we will analyz
e data using R and RStudio.
 Notice: All students must use your PC
in the next week’s lesson.
 You must install R and RStudio on your
PC before the lesson.

(C) 2007-2022 Hirohisa AMAN

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