Class
public class SomeController {
public SomeController (ApexPages.StandardController controller) {
if (System.currentPageReference().getParameters().
get(’someParam’)!= null {
ApexPages.addMessage(new ApexPages.Message
(ApexPages.Severity.CONFIRM, ‘Parameter Exists’));
} else if (System.currentPageReference().
getParameters().get(’update’)!= null) {
ApexPages.addMessage(new ApexPages.Message
(ApexPages.Severity.ERROR,
’Parameter Does Not Exist’));
}
}
}
Test Class
@isTest
public class TestClass {
static testMethod void testConstructorParameters_noParams() {
PageReference ref =
new PageReference(’/apex/yourVisualforcePage’);
Test.setCurrentPage(ref);
SomeController controller = new SomeController (null);
System.assert
(ApexPages.getMessages().size() == 1);
System.assert
(ApexPages.getMessages().get(0).getDetail()
== ‘Parameter Does Not Exist’);
System.assert
(ApexPages.getMessages().get(0).getSeverity()
== ApexPages.Severity.ERROR);
}
static testMethod void testConstructorParameters_paramExists() {
PageReference ref =
new PageReference(’/apex/yourVisualforcePage?someParam=xyz’);
Test.setCurrentPage(ref);
SomeController controller = new SomeController (null);
System.assert
(ApexPages.getMessages().size() == 1);
System.assert
(ApexPages.getMessages().get(0).getDetail()
== ‘Parameter Exists’);
System.assert
(ApexPages.getMessages().get(0).getSeverity()
== ApexPages.Severity.CONFIRM);
}
}
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