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1)
Write and explain various loop command?
a)
A for loop instructs WinRunner to
execute one or more statements a specified number of times.
It has the following syntax:
for ( [ expression1 ]; [ expression2 ];
[ expression3 ] )
statement
i.
First, expression1 is executed.
Next, expression2 is evaluated. If expression2 is true, statement is executed
and expression3 is executed. The cycle is repeated as long as expression2
remains true. If expression2 is false, the for statement terminates and
execution passes to the first statement immediately following.
ii.
For example, the for loop below
selects the file UI_TEST from the File Name list
iii.
in the Open window. It selects
this file five times and then stops.
set_window ("Open")
for (i=0; i<5; i++)
list_select_item("File_Name:_1","UI_TEST"); #Item
Number2
b)
A while loop executes a block of
statements for as long as a specified condition is true.
It has the following syntax:
while ( expression )
statement ;
i.
While expression is true, the statement is executed. The loop ends when
the expression is false. For example, the while statement below performs the
same function as the for loop above.
set_window ("Open");
i=0;
while (i<5){
i++;
list_select_item ("File Name:_1", "UI_TEST"); #
Item Number 2
}
c)
A do/while loop executes a block of
statements for as long as a specified condition is true. Unlike the for loop and
while loop, a do/while loop tests the conditions at the end of the loop, not at
the beginning.
A do/while loop has the following syntax:
do
statement
while (expression);
i.
The statement is executed and then the expression is evaluated. If the
expression is true, then the cycle is repeated. If the expression is false, the
cycle is not repeated.
ii.
For example, the do/while statement below opens and closes the Order
dialog box of Flight Reservation five times.
set_window ("Flight Reservation");
i=0;
do
{
menu_select_item ("File;Open Order...");
set_window ("Open Order");
button_press ("Cancel");
i++;
}
while (i<5);
2)
Write and explain decision making command?
a)
You can incorporate decision-making
into your test scripts using if/else or switch statements.
i.
An if/else statement executes
a statement if a condition is true; otherwise, it executes another statement.
It has the following
syntax:
if ( expression )
statement1;
[ else
statement2; ]
expression is evaluated. If
expression is true, statement1 is executed. If expression1 is false, statement2
is executed.
b)
A switch statement enables
WinRunner to make a decision based on an expression that can have more than two
values.
It has the following syntax:
switch (expression )
{
case case_1: statements
case case_2: statements
case case_n: statements
default: statement(s)
}
The switch statement consecutively
evaluates each case expression until one is found that equals the initial
expression. If no case is equal to the expression, then the default statements
are executed. The default statements are optional.
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