Professional IronPython

LISTINg 18-4: 
 Developing an application test harness
# Print out statements of everything the test is doing.
print ‘Beginning Test’
print ‘Loading clr’
continues
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CHAPTER 18
Using ironPython for APPlicAtion testing
import clr
print ‘Loading System assembly support’
import System
print ‘Creating a blank event argument.’
EventArg = System.EventArgs()
print ‘Loading test module’
clr.AddReferenceToFile(‘TestApplication.EXE’)
from TestApplication import *
CreateHeading(‘0001’, ‘Creating a test form’)
MyForm = Form1()
CheckType(MyForm, ‘TestApplication.Form1’)
CreateFooter()
CreateHeading(‘0002’, ‘Testing a default add’)
MyForm.btnAdd_Click(object, EventArg)
ShowInit(MyForm.txtValue1.Text, MyForm.txtValue2.Text)
ShowValues(‘2’, MyForm.txtResult.Text)
CreateFooter()
CreateHeading(‘0003’, ‘Testing a default subtract’)
MyForm.btnSubtract_Click(object, EventArg)
ShowInit(MyForm.txtValue1.Text, MyForm.txtValue2.Text)
ShowValues(‘0’, MyForm.txtResult.Text)
CreateFooter()
CreateHeading(‘0004’, ‘Testing add with one change’)
MyForm.txtValue1.Text = ‘5’
MyForm.btnAdd_Click(object, EventArg)
ShowInit(MyForm.txtValue1.Text, MyForm.txtValue2.Text)
ShowValues(‘6’, MyForm.txtResult.Text)
CreateFooter()
# Pause after the debug session.
raw_input(‘\nPress any key to continue...’)
The test script begins by loading the required code for the test, beginning with 
clr
. Because this test 
has to work with event handlers, it needs to load the System assembly and create a 
System.EventArgs
object, 
EventArg
. Because the event handlers in this application don’t actually use the event arguments, 
EventArg
is actually a default object with no content. The call simply won’t succeed without it, how-
ever, so you must create it.
After the script finishes the prerequisites, it performs the first test, which is to create the Windows 
Forms object, 
Form1
, as 
MyForm
. The creation process could fail; you want to verify that 
MyForm
isn’t 
null, so that’s the first test that relies on the 
CheckType()
function. You don’t have to show the form 
LISTINg 18-4 
(continued)
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