Session 8: Unit testing, Module testing and Integration testing
Session 8: Develop a set of test cases that will completely test the program in session 7. The test case should be separately developed for Unit testing, Module testing and Integration testing.
Here we want to generate test cases that will completely test the program given above. This is the program, which takes two matrices as input and generates multiplication of two matrices as output. In order to multiply the two matrices there is a condition for the two matrices, is given below.
·
The no. of columns of the first
matrix is equal to the no. of rows of the second matrix, then only it is
possible to multiply two matrices, otherwise it is not possible to
multiply two matrices.
Unit Testing
Unit testing is procedure used to verify particular segment
of source code is working properly. The main idea about this testing is to
generate the test cases for all function or methods. The main goal of unit
testing is isolate each part of program and show individual parts are correct.
In above program, there are three functions, which perform input, output, and
multiplication of two matrices. Let us consider the first function.
In
main function let us consider
if(c1!=r2)
{
printf("\n unable to multiply");
return;
}
else
{
input(a,r1,c1);
input(b,r2,c2);
multiply(a,b,r1,c1,r2,c2); output(a,r1,c1);
output(b,r2,c2);
}
The
above source code determines the no of columns of the first matrix
equal
to the no. of rows of the second matrix then only the multiplication is
possible.
|
Test Case |
c1 |
r2 |
Expected
Output |
|
1 |
3 |
3 |
Multiplication
of two matrices
is possible |
|
2 |
3 |
4 |
Multiplication of two matrices is impossible |
This
is a segment of input function. if (r1>=10||c1>=10)
{
printf(“\n Unable to enter matrix”); return;
}
else
{
for(i=0;i<r1;i++) for(j=0;j<c1;j++) scanf("%d",&a[i][j]);
}
The above code reprgents the no. of rows and no. of columns
that are to be given is less than the size of matrix. If the it is not possible
to enter the value in the matrix is not greater than its size.
|
Test Case |
r1 |
c1 |
Expected Output |
|
1 |
3 |
3 |
Entering of matrix |
|
2 |
10 |
10 |
Unable to enter matrix |
|
3 |
11 |
11 |
Unable to enter matrix |
if
(r1>=10||c1>=10)
{
printf(“\n Unable to enter matrix”); return;
}
else
{
for(i=0;i<r2;i++)
{
for(j=0;j<c2;j++) printf("%d\t",a[i][j]); printf("\n");
}
}
The above code is a segment of output function. This code
represent the no
.of rows and no. of columns of the matrix is less than the
size of the matrix if we gave the no. of rows and no. of columns greater than
or equal to size of the array, then we get unexpected values as output
|
Test Case |
r1 |
c1 |
Expected
Output |
|
1 |
3 |
3 |
Shows output of matrix |
|
2 |
10 |
10 |
Unexpected
values |
|
3 |
11 |
11 |
Unexpected
values |
Module
Testing
Module testing is procedure used to verify the source code
is working properly or not. The main idea about this testing is to generate the
test cases for all function or methods. In above program, there are three
functions, which perform input, output, and multiplication of two matrices. Let
us consider the first function.
Input
Function
void
input(int a[10][10],int r1, int
c1)
{
int
i,j;
if
(r1>=10||c1>=10)
{
printf(“\n Unable to enter matrix”); return;
}
printf("\n enter 1st matrix elements \n");
for(i=0;i<r1;i++) for(j=0;j<c1;j++) scanf("%d",&a[i][j]);
}
In above function there are three inputs. The inputs are no.
of rows and no. of columns. The no. of rows and no. of columns can not be
greater than the size of the array declared. If the no. of rows and no. of
columns is greater than are equal to the size of the array, than it is not
possible to enter the values into the array.
|
Test Case |
r1 |
c1 |
Expected Output |
|
1 |
3 |
3 |
Entering of matrix |
|
2 |
10 |
10 |
Unable to enter matrix |
|
3 |
11 |
11 |
Unable to enter matrix |
The
second function in the above program is given below
Output
Function
void
output(int a[10][10], int r2,
int c2)
{
int
i,j;
if
(r1>=10||c1>=10)
{
printf(“\n Unable to enter matrix”); return;
}
else
{
for(i=0;i<r2;i++)
{
for(j=0;j<c2;j++) printf("%d\t",a[i][j]); printf("\n");
}
}
}
In above function there are three inputs. In this function,
the no. of rows and no. of columns that are to be entered is not greater than
size of the array.
If the no. of rows and no. of columns is less than the size
of the array then it shows that output of the values in the array. If the no.
of rows and no. of columns is greater than are equal to the size of the array
then the function shows unexpected values because of more than the size of
array.
|
Test Case |
r1 |
c1 |
Expected
Output |
|
1 |
3 |
3 |
Shows output of matrix |
|
2 |
10 |
10 |
Unexpected
values |
|
3 |
11 |
11 |
Unexpected
values |
The
next function of above program is
Multiplication
Function
void
multiply(int a[10][10], b[10][10], int r1,
int c1, int r2, int c2)
{
int
i,j,k,c[10][10]; for(i=0;i<r1;i++)
for(k=0;k<c2;k++)
{
c[i][k]=0;
for(j=0;j<c1;j++)
c[i][k]=c[i][k]+a[i][j]*b[j][k];
}
printf("\n the multiplication of matrices is \n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++) printf("%d\t",c[i][j]); printf("\n");
}
}
In above function there are six inputs.
·
If the no. of rows and no. of
columns of the two matrices less than the size of the respected matrix and the
column of the first matrix is equal to the row of the second matrix then we get
the correct multiplication of two matrices.
·
If the no. of rows and no. of
columns is greater than or equal to the size of the respected array and column
of the first matrix is equal to the row of the second matrix, then
multiplication is possible but we get the unexpected values because of the more
than the size of the array.
·
If the no. of rows and no. of
columns is less than the size of the respected array and column of the first
matrix is not equal to the row of the second matrix, then matrix multiplication
is not possible.
|
Test Case |
r1 |
c1 |
r2 |
c2 |
Expected
Output |
|
1 |
3 |
3 |
4 |
4 |
Unable
to multiply |
|
2 |
3 |
3 |
3 |
3 |
Multiplication is possible |
|
3 |
3 |
3 |
10 |
10 |
Unable
to multiply |
|
4 |
3 |
3 |
11 |
11 |
Unable
to multiply |
|
5 |
10 |
10 |
3 |
3 |
Unable
to multiply |
|
6 |
11 |
11 |
3 |
3 |
Unable
to multiply |
|
7 |
10 |
10 |
10 |
10 |
Unable
to multiply |
|
8 |
11 |
11 |
11 |
11 |
Unable
to multiply |
Integrated Testing
Integration testing is the phase of software testing in
which individual software modules are combined and tested as a group.
Integrating testing as takes as its input, modules that have been checked out
by unit testing groups them in larger aggregates, applies this test in order to
know whether the system generate the actual output or not.
The main aim of this program is to calculate multiplication
of two matrices. The multiplication function takes two matrices as input and
generates the multiplication as matrix. We must determine the two matrices
before the
multiplication of two matrices then only we get the
multiplication of two matrices. If we don’t determine any of two matrices then
we get unexpected values as multiplication of two matrices by taking the
default values stored in matrix.
|
Test Case |
Matrix a |
Matrix b |
Expected
Output |
|
1 |
determined |
determined |
Expected output as multiplication
of two matrices |
|
2 |
undetermined |
determined |
Unexpected output as multiplication of two matrices |
|
3 |
determined |
undetermined |
Unexpected output as multiplication of two matrices |
|
4 |
undetermined |
Undetermined |
Unexpected output as multiplication of two matrices` |
The main aim of the above program is not achieved if we undetermined any of the two matrices which are taken as input for multiplication of two matrices.
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