public void drawLine$($Graphics$2$D g$2$d$,$ Node$2$D parent, Color color, int lineWidth$)\{$

GeneralPath path $=$ new GeneralPath$()$;

int counter $=0$;

for$($int i $=4\mathrm{.}2.$ Black Box Testing

Test cases must be designed solely based on program requirements and functional

specifications, independent of the internal code structure.

Cover a wide range of scenarios, including:

Valid$/$invalid input combinations

Boundary values

Expected error conditions

Normal and abnormal system behaviour

Document test cases clearly, specifying expected results for each in section $5.$

$4\mathrm{.}3.$ White Box Testing

Analyse the provided source code to understand program logic and identify potential

test points.

Design test cases to specifically target:

Control flow branches

Different code paths

Loops and conditional statements

Document test cases and code coverage metrics and report any identified code errors,

inefficiencies, or security vulnerabilities in section $5.0$; i $$ graph.getDataSize$(0)$; i$++)\{$

double xcl $=$ parent.transformX$($graph$.$getDataX$($i$))$;

double ycl $=$ parent.transformY$($graph$.$getDataY$($i$))$;

if$($i$==0)\{$

path.moveTo$($xcl$,$ ycl$)$;

$\}$ else $\{$ path.lineTo$($xcl$,$ ycl$)$;$\}$

$\}$

g$2$d$.$setColor$($color$)$;

g$2$d$.$setStroke$($new BasicStroke$($lineWidth$))$;

g$2$d$.$draw$($path$)$;

$\}$