3.Keylabs Training Parameterization
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3.Keylabs Training Parameterization
Transcript of 3.Keylabs Training Parameterization
Objectives
In this lesson, you will learn:
• The benefits of parameterization
• How to parameterize fields using VuGen
• How to work with data files
• Problems that may occur during playback
The Problems
• Vusers fail during playback
• Results meaningless because real-world conditions not emulated
Vusers Input Identical Data
Order number 1234 is
already here!
Server
02/14/99 was yesterday!
Don’t bother me, the data’s in the
cache!
3rd Vuser Run
The Solution
PARAMETERIZATION
Key Terms Used in This Course
The practice of replacing a recorded value in a Vuser with a placeholder which can represent an expandable range of values.
Parameterization
The Objectives of Parameterization
• Solve certain problems that may occur during playback– date constraints– unique constraints– data caching– data dependency
• Emulate real user activity• Exercise the server
How Parameterization Works
Hard-coded (same value is input every time) Place order for item # A5455 2(quantity with credit card) 421234993234564
Place order for item # (quantity with credit card
Parameterized
)
PLACEHOLDER
PLACEHOLDER
PLACEHOLDER
447475385798345
400320230230239
409485726280349
421234993234564
423847495782716
412353648765410
432165498765421
A5455
C3401
Z1120
A0544
B0033
C8488
G9993
11
1
4
210
69
5
2
iteration 1
iteration 2
iteration 3
iteration 4
iteration 5
iteration 6
iteration 7
LoadRunner Expert Workflow“Zooming In”
TuneSystem Based
on Analysis
Analyze System Under Load
Run Scenarios
Create Scenarios
Create Web Virtual Users
Phase 1
Plan Load Test
Phase 2 Phase 3 Phase 4 Phase 5
PLAN LOAD TEST
1.1 Get system usage information
1.2 Document business process properties
1.3 Determine which fields to parameterize
1.4 Establish which data to use
1.3 Determine Which Fields to Parameterize
• Which fields require a current date?• Which fields require unique values?• Which fields exercise the database server?• Which fields’ values are dependent for validity
on the value of another field?
Date Constraint Violation
Database server
Order date 02/02/99
Web browser (client)
Order date 02/02/99
Order date 02/02/99
O.K.
Order date 02/02/99
Expired Date
Web server
1 2 3 4 57 8 9 10 116
13 14 15 16 171219 20 21 22 231825 26 27 2824
February
1 2 3 4 57 8 9 10 116
13 14 15 16 171219 20 21 22 231825 26 27 2824
February
PROBLEM
O.K.
Parameterize the Date
Database server
Order date 02/02/99
Web browser (client)
Order date 02/15/99
Order date 02/02/99
O.K.
Order date 02/15/99
Web server
1 2 3 4 57 8 9 10 11613 14 15 16 171219 20 21 22 231825 26 27 2824
February
1 2 3 4 57 8 9 10 11613 14 15 16 171219 20 21 22 231825 26 27 2824
February
SOLUTION
Unique Constraint Violation
Database server
Web browser (client)
Book order #00115
Book order #00115
Unique constraint violation
Web server
1strun
recorded order number
PROBLEM
Book order #00975
O.K.
Parameterize Order Number
Database server
Book order #00975
Web browser (client)
Book order #00233
O.K.
Book order #00233
Web server
1st run
2ndrun
SOLUTION
Reusing Data Doesn’t Exercise the System
Database server
Find book title The Sun Also Rises
Web browser (client)
Find book title The Sun Also Rises
Find book title The Sun Also Rises
5 matches found
Web server
5 matches found
Server not exercised
1st run
2ndrun
1. THE SUN ALSO RISES 2. THE SUN
ALSO RISES 3. THE SUN ALSO RISES 4.
THE SUN ALSO RISES
Cache
PROBLEM
Parameterized Data Exercises the System
Database server
Find book title The Sun Also Rises
Web browser (client)
Find book title The Great Gatsby
Find book title The Sun Also Rises
5 matches found
Web server
1st run
2ndrun
9 matches found
Find book title The Great Gatsby
SOLUTION
Data Dependent Fields
Database server
Web browser (client)
Find authorShakespeare
45 matches found
1st run
2ndrun
Display match MacBeth
Display MacBeth
Find author Shakespeare
Find author Dickens19 matches found
Display match MacBeth
Display MacBeth
Find author Dickens
Webserver
OK
MacBeth not found
PROBLEM
Parameterize Data Dependent Fields
Database server
Web browser (client)
Find authorShakespeare
45 matches found
1st run
2ndrun
Display match MacBeth
Display MacBeth
Find author Shakespeare
Find author Dickens19 matches found
Display match Oliver Twist
Display Oliver Twist
Find author Dickens
Webserver
OK
OK
SOLUTION
Parameterization Decision-MakerFor each field, ask . . .
Is there a date
constraint?Does
data get cached?
Parameterize Parameterize Parameterize
Is there a unique
constraint?
Is this a data
dependent field?
Parameterize
Do not parameterize
No
Yes
No
No
No
Yes
YesYes
Example for Discussion
Uniqueconstraint?
Dateconstraint?
Datadependent
field?
LoadRunner Expert Workflow“Zooming In”
TuneSystem Based
on Analysis
Analyze System Under Load
Run Scenarios
Create Scenarios
Create Web Virtual Users
Phase 1
Plan Load Test
Phase 2 Phase 3 Phase 4 Phase 5
PLAN LOAD TEST
1.1 Get system usage information
1.2 Document business process properties
1.3 Determine which fields to parameterize
1.4 Establish which data to use
10/26/1999040498MondayTrueSmith, Wm.$230.59
1.4 Establish Which Data to Use
• Obtain master data– extract from database
• Create valid transactional data – predict according to type of data– obtain from functional expert
Databaseserver
Extract Values From Database
47555
33339
48449
23564
84444
00410
12221Willamette
169.00
12/12/99C044
100345
48449
LoadRunner Expert Workflow“Zooming In”
TuneSystem Based
on Analysis
Analyze System Under Load
Run Scenarios
Create Scenarios
Create Web Virtual Users
Phase 1
Plan Load Test
Phase 2 Phase 3 Phase 4 Phase 5
CREATE WEB VIRTUAL USERS
2.1 Record user actions(Correlate script)
2.2 Add LoadRunner transactions
2.3 Parameterize data
2.4 Add verification checks(Check points)
2.5 Verify correct execution(Replay and verify)
Key Terms Used in This Course
A placeholder which replaces a hard-coded, recorded value in the script. The parameter is replaced with a dynamic data value at run time.
Parameter
2.3 Parameterize DataOpen the Step Properties
2. Right-click step which contains the field
VUSER DESIGN SPECIFICATIONField Data
mtoys search_button
query radishbeetcarrotrhubarbonion
1. Identify field to parameterize (Planning Specification)
3. Select “Properties”
2.3 Parameterize DataCreate a Parameter1. Click Parameter button next to the recorded value
2. Enter a parameter name (or select from the list)
VUSER DESIGN SPECIFICATIONField Data
mtoys search_button
query radishbeetcarrotrhubarbonion
3. Confirm that parameter type is "File"
2.3 Parameterize DataOpen the Parameter Properties1. Click the Properties button2. Click the Create button and confirm new file creation
2.3 Parameterize DataOpen the Data File
• Click the Edit button to open the data file in Windows Notepad
FILE NAME
Parameter data file
<param>.dat<Vuser>
• <parameter>.dat file is added to Vuser directory
VUSER DESIGN SPECIFICATIONField Data
mtoys search_button
query radishbeetcarrotrhubarbonion
2.3 Parameterize Data Add Data to the File• Enter new data in the Notepad window• Press Enter after typing each data item
(including the last item)
DATA
PARAMETER
NAME
• Close Notepad and save the changes
2.3 Parameterize Data File Data Appears in Parameter Properties• In the Parameter
Properties dialog, data from the file appears in table form
• Multiple columns for different parameters are allowed in the same data file
Select the Data Access Method
• Sequential• Random• Unique• Same line as . . .
1
2
3
4
VuserIteration
Vuser 1 Vuser 2 Vuser 3 Vuser 4
Data File Replacement Methods
a a a a
b b b b
c c c c
d d d d
a e i m
b f j n
c g k o
d h l p
a
c
d
h
f
e
j
g
l
m
k
n
i
c
e
b
Sequential Random
param1
Unique
LoadRunner Expert Workflow“Zooming In”
TuneSystem Based
on Analysis
Analyze System Under Load
Run Scenarios
Create Scenarios
Create Web Virtual Users
Phase 1
Plan Load Test
Phase 2 Phase 3 Phase 4 Phase 5
CREATE WEB VIRTUAL USERS
2.1 Record user actions
2.2 Add LoadRunner transactions
2.3 Parameterize data
2.4 Add verification checks
2.5 Verify correct execution
2.5 Verify Correct ExecutionRun-Time Settings – IterationsFor the Sequential access method, Iteration Count
should equal the number of rows in the data file
2.5 Verify Correct ExecutionRun-Time Settings – LogSelect Extended log, and check Parameter substitution
2.5 Verify Correct ExecutionExecution Log
Log Run-Time Settings cause parameter data to display in Execution Log
2.5 Verify Correct ExecutionMercury Test Results Window
Parameter data is also displayed on the Iteration Summary page
PAGE RETURNED FOR A SUBMIT FORM STEP
2.5 Verify Correct ExecutionMercury Test Results Window
Sometimes, parameter data may be displayed on the result page for the step that used the data
Summary• Parameterize fields in order to:
– solve unique data constraints– solve date constraints– exercise the server(s)– handle data dependency
• Establish input data:– from the database– with the help of a Functional Expert
• Control Vuser execution from the Run-Time Settings– extended log, parameter substitution– number of iterations
Lab Exercise
keylabstraining.com
Thank you from Keylabs TrainingEmail Id: [email protected]: 9959389467Facebook : jaipal avula
