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The scope of unit test functions is manipulated before a test runs, so you cannot reference variables defined in the function's scope chain (closures will not work either).

If you want to reference variables external to the Unit Test function, pass them in via a settings object defined in the associated Test() invocation (see Example section below).

function([settingsRef]) {
	// code and assertions
}

var data = {bar: "fish"};
Test("Foo", Test.ANY( ), function() {
	comment( "My first unit test!" );
	// in here, 'data' is undefined as the function is re-scoped
	// to the unit test instance it's running within
	equal( "fish", data.bar, "data.bar == 'fish'?" ); // error: data not defined
	equal( "fish", testSettings.bar, "testSettings.bar == 'fish'?" ); // pass
}, data);
 
// if you wanted to access the settings via a custom named variable,
// specify it's name as the first parameter to the unit test function...
Test("Foo2", Test.ANY( ), function(data) {
	comment( "My second unit test!" );
	// now you can access testSettings via 'data' parameter
	equal( "fish", data.bar, "data.bar == 'fish'" ); // pass
	// testSettings will still be defined...
    equal( "fish", testSettings.bar, "testSettings.bar == 'fish'" ); // pass
}, data);