In written english, what I am trying to accomplish is the following:

• Build a visualforce page displaying details for a specific Property__c record
• For that property, show a list on the page of related child Suite__c records where Status__c = 'Available'
• For that property, show a list on the page of related child Spec_Sheet__c records where Property__c = 'the id of the property being viewed'
• Use this visualforce page publically as part of a Force.com Site (meaning, users will not authenticate)

Here is my controller extension:

public class MyPropertyExtension {

    Property__c prop;
  
    public MyPropertyExtension(ApexPages.StandardController PropertyController) {
        this.prop = (Property__c)PropertyController.getRecord();
    }
        
    public List<Suite__c> getSuiteRecords() {
         return [Select s.id, s.Name, s.Status__c, s.Property__c, Total_Raised_Floor_sqft__c, KVA__c, kW_of_UPS__c, Available_PDU_Capacity_kW__c from Suite__c s Where (s.Status__c!= 'Leased') AND (s.Property__c =:ApexPages.currentPage().getParameters().get('id'))];
    } 
    
    public List<Spec_Sheet__c> getSpecRecords() {
         return [Select s.id, s.Name, s.Property__c, s.Suite__c from Spec_Sheet__c s Where (s.Suite__r.Status__c = 'Available') AND (s.Property__c =:ApexPages.currentPage().getParameters().get('id'))];
    }       
}

And here is what I have as my test class:

@isTest
private class TestMyPropertyExtension {

        private final Property__c prop;
        
        public TestMyPropertyExtension(ApexPages.StandardController PropertyController) {
            this.prop = (Property__c)PropertyController.getRecord();
        }        

        static testmethod void testGetSuitesPositive(){
        
        // Create dummy data for test purposes.
        // Always assume your org has no data because the record may not be there later.    
        Property__c p = new Property__c();
        p.Name = 'foo';
        System.debug('Inserting the test property record...');
        insert p;

        Suite__c sAvailable = new Suite__c();
        sAvailable.Name ='bar';
        sAvailable.Property__c = p.Id;
        sAvailable.Status__C = 'Available';
        System.debug('Inserting the test suite record with status = Available...');
        insert sAvailable;

        Suite__c sLeased = new Suite__c();
        sLeased.Name ='bar';
        sLeased.Property__c = p.Id;
        sLeased.Status__c = 'Leased';
        System.debug('Inserting the test suite record with status = Leased...');        
        insert sLeased;
        
        // Use the vf page in my org named 'locatorDetails'
        PageReference pageRef = Page.locatorDetails;
        Test.setCurrentPage(pageRef);

        // Set the id of the current vf page to a Property__c record that I know has child Suite__c and Spec_Sheet__c records
        ApexPages.currentPage().getParameters().put('id', p.Id);
        TestMyPropertyExtension controller = new TestMyPropertyExtension();

        //Call controller.suiteRecords() and assert the list contains the expected records.
        List<Suite__c> suiteRecords = controller.suiteRecords();
        
        system.assertEquals(suiteRecords.size(),1);

            for(Suite__c s: suiteRecords)
            {
                System.assertEquals('Available', s.Status__c);
                System.assertEquals(sAvailable.Id, s.Id);
            }
        }
        
        static testmethod void testGetSpecSheetsPositive(){
        // Create dummy data for test purposes.
        // Always assume your org has no data because the record may not be there later.    
        Property__c p = new Property__c();
        p.Name = 'foo';
        insert p;

        Suite__c sAvailable = new Suite__c();
        sAvailable.Name ='bar';
        sAvailable.Property__c = p.Id;
        sAvailable.Status__C = 'Available';
        insert sAvailable;

        Spec_Sheet__c spec = new Spec_Sheet__c();
        spec.Name ='bar';
        spec.Property__c = p.Id;
        spec.Suite__c = sAvailable.Id;
        insert spec;

        // Use the vf page in my org named 'locatorDetails'
        PageReference pageRef = Page.locatorDetails;
        Test.setCurrentPage(pageRef);

        // Set the id of the current vf page to a Property__c record that I know has child Suite__c and Spec_Sheet__c records
        ApexPages.currentPage().getParameters().put('id', p.Id);
        TestMyPropertyExtension controller = new TestMyPropertyExtension();

        //Call controller.getSpecSheetLookup() and assert the list contains the expected records.
        List<Spec_Sheet__c> specRecords = controller.specRecords();
            system.assertEquals(specRecords.size(),1);
        }              
}

The error message I receive is:

Error: Compile Error: Constructor not defined: [TestMyPropertyExtension].<Constructor>() at line 39 column 46

Which has to do with this line in my test class:

TestMyPropertyExtension controller = new TestMyPropertyExtension();

I'm not certain why it is giving me a "constructor not defined" error message when I have the constructor at the top of my test class. Here:

private final Property__c prop;
        
public TestMyPropertyExtension(ApexPages.StandardController PropertyController) {
this.prop = (Property__c)PropertyController.getRecord();
}  

Two questions:

1. Can you tell me what the "constructor not defined" error message means, so that I can learn from this?
2. Can you tell me what I am doing wrong at that particular line where I am receiving the error message?