WEBVTT

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The room class now has some significant 

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additional capability to allow rooms to be linked together.

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In this demo I'm going to test this 

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new version of the room class

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to do this I need to add a new test

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to the unit test class RoomTest

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so let's open that class.

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My test is going to need some additional test objects

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I need some extra rooms, so lets declare

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some new rooms, room two

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room three and

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room four, that should be enough.

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Next I'll need to create these new room objects

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in the setup method, so lets

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add some code here, I'm just going to paste 

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this code for speed

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so there we go, three new room objects

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just note there at room three

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has the description hall 

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because that's going to be important.

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Now I need to link some rooms together

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so I'm going to add some code to

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setup these three new rooms

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as the exits of the first room

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so here's the code to do that.

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So note there that room three

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has been setup as the exit for room one labelled north

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note that these new test objects will not have any

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effect on the existing test method which relates only

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to the items in the first room.

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Now that I've got the new test objects included

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I just need to add a new test method

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which I'm going to do here

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after the previous test method.

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This tests that the GetExit method of room

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is working correctly and that for a given label

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it will return the correct room, so the test 

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method is called testGetExit

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recall that in setting up the test objects I assigned the

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the label north to a room with the description hall.

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So the test method calls the getExit method of room one

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supplies the label north as a parameter and assigns

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the resulting room object to a variable target

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it then asserts that the description

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field of that target object is in fact hall

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and if thats true the test passes, if its not the test fails.

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So lets compile the test class

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which compiles with no errors and now if I run

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the tests in the Room class, either by using Test All

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or by clicking the run test button

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you see that two tests have run, testGetItem

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and testGetExit, they both pass

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so I get a green bar showing me that

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all the tests in the project are passing successfully.

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Note that when you add new functionality to a class

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and new tests for that functionality

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you should also rerun the existing test in the project

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and thats what we've done here.