testing sweng

8/3/2019 Testing Sweng

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Black Box & White Box Testing

BLACK BOX TESTING:-

1. CAUSE EFFECT GRAPH:

Consider the payroll system of a person:

(a) If the salary of a person is less than equal to Rs. 70,000 and expenses do

not exceed Rs. 30,000 then 10% tax is charged by IT department.

(b) If the salary is greater than Rs.60,000 and less than equal to Rs 2lakhs

and expenses don't exceed Rs. 40,000 than 20% tax is charged by IT

department.

(c) For salary greater than Rs 2 lacks, 5% additional surcharge is also

charged.

(d) If expenses are greater than Rs. 40,000 surcharge is 9%.

Causes Effects

C1 : Salary < =

70,000

C2 : Salary >

60,000 and Salary

< = 2 lacks

C3 : Salary > 2

lacks

C4 : Expenses < =

30,000

C5 : Expenses < =

40,000

C6 : Expenses >

40,000

E1: 10% tax is charged.

E2: 20% tax is charged.

E3: (20% tax) + (5%

surcharge) is charged.

E4: (20% tax) + (9%

surcharge) is charged.

1




AND

AND

AND

AND

2

C

1

C2

C

3

E

2

C

4

E

1

C

6

E

3

E

4

C

5




BOLLEAN FUNCTIONS:

E1: C1 ^ C4

E2: C2 ^ C5

E3: C3 ^ c5

E4: C3^ C6

DECISION TABLE:

C1 C2 C3 C4 C5 C6 E1 E2 E3 E4

T F F T F F T F F F

F T F F T F F T F F

F F T F T F F F T F

F F T F F T F F F T

T T F F F F T F F F

T F F T T F T F F F

F T F T F F F T F F

3




TEST CASES:

TEST

CASES

INPUTS (CAUSES) EXPECTED OUTPUTS

(EFFECTS)Salary Expense

1 Salary < =

70,000

Expenses < =

30,000

10% tax is charged.

.

2 Salary > 60,000

and Salary < =

2 lacks

Expenses < =

40,000

20% tax is charged

3 Salary > 2 lacks Expenses < =

40,000

(20% tax) + (5%

surcharge) is charged

4 Salary > 2 lacks Expenses >40,000

(20% tax) + (9%surcharge) is charged.

4




2. EQUIVALENCE PARTITIONING:

Lets we have to test a five digit number.

Partitions for inputs : Let the inputs is denoted by ‘p’.

p< 10000

p is in between 10000 – 99999

> 99999

P is alphabet

P is floating point number

P is null

Partitions for outputs:

Is five digit number

Is not five digit number

Error message

Test Cases 1 2 3 4 5

5




P 123 24242 -23 34.7 Abc

Expected

output

Is not five

digit

number

Is five digit

number

Is not

five

digit

numb

er

Error

message

Error

message

Test

Case

6 7 8 9 10 11 12

P 435334

10000

-34.32 99999

Gfs123 $@#% null

Expect

ed

output

Is not

five

digit

numb

er

Is five

digit

numb

er

Error

messa

ge

Is five

digit

numb

er

Error

message

Error

message

Error

message

6




2. WHITE BOX TESTING:

Branch and Path Coverage(av);

1 public static double ReturnAverage(int value[], int AS, int MIN, int

MAX){

2 int i, ti, tv, sum;

3 double av;

4 i = 0; ti = 0; tv = 0; sum = 0;

5 while (ti < AS && value[i] != -999) {

6 ti++;

7 if (value[i] >= MIN && value[i] <= MAX) {

8 tv++;

9 sum = sum + value[i];

10 }

11 i++;

12 }

13 if (tv > 0)

14 av = (double)sum/tv;

15 else

16 av = (double) -999;

17 return (av);

18 }

7




8




Varibles definitions P-use C-use

value[] 1 5,7 9

AS 1 5

MIN 1 7

MAX 1 7

i 4 11ti 4 5 6

tv 4 13 8

Sum 4 9,14

av 14,16 17

Du Pairs:

9




1,5 & 1,7 : p-use of value[]

1,9: c-use of value[]

1,5: p-use of AS

1,7: p-use of MAX

1,7: p-use of MIN

4,11: c-use of i

4,5: p-use of ti

4,6: c-use of ti

4,13: p-use of tv

4,8 c-use of tv

4,9 & 4,14 c-use of sum

14,17 &16,17 c-use of av

10




TEST CASES( ALL C-USE)

TEST CASE#

VARIABLES DU-PAIRS

SUBPATHS

INPUT OUTPUTS

(PUSHOUTPUT

S)

1 Value 1,9 1-9 Values at

value[i]

Takes the

values at ith

position of

array

2 i 4,11 4-11 Integer

value

Increments i

3 Tv 4,8 4-8 Integer

value

Increments tv

4 Sum 4,9 4-9 Integer

value

Adds to the

sum

5 Sum 4,14 4-14 Integer

value

Adds to the

sum

6 Av 14,17 14,15,16,17

Takes theComputed

the value

Returns thevalue

7 av 16,17 16,17 Takes the

Computed

the value

Returns the

value

12

testing sweng

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