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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([dataRef]) {
	// code and assertions
}

// Define some test data for our unit test
var mySettingsdata = {bar: "fish"};
 
// The test data is passed in as 3rd parameter of the Test() function
// and is accessible via the testData variable
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", testSettingstestData.bar, "testSettingstestData.bar == 'fish'?" ); // pass
}, data); // <-- test data passed in here
 
// If you wanted to access the testData via a custom named variable,
// specify it's name as the first parameter to the unit test function...
Test("Foo2", Test.ANY( ), function(data) { // <-- custom reference to testData
	comment( "My second unit test!" );
	// Now you can access testData via 'data' parameter
	equal( "fish", data.bar, "data.bar == 'fish'" ); // pass
	// Note that testData variable will still be defined...
    equal( "fish", testData.bar, "testData.bar == 'fish'" ); // pass
}, mySettingsdata);