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TiddlyWiki5/editions/tw2/source/tiddlywiki/tests/js/mock.js

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tests_mock = {
frame: {},
/*
* replace named global functions with a mock version
* - mock can access original function, and store context in tests_mock.frame[funcName]
*/
before: function(funcName,mocker)
{
var frame = {};
frame.called = 0;
frame.savedFunc = eval(funcName);
if (typeof frame.savedFunc != "function")
throw(funcName +" is not a function: " + (typeof frame.savedFunc));
var mockFunction = function() {
tests_mock.frame[funcName].called++;
if (mocker)
return mocker.apply(this, arguments);
};
eval(funcName + "=mockFunction");
this.frame[funcName] = frame;
},
/*
* restore named global function
* - return frame object, which includes a count of calls
*/
after: function(funcName)
{
frame = this.frame[funcName];
eval(funcName + '=frame.savedFunc');
return frame;
},
/*
* save values of named global variables
*/
save: function(varName)
{
var frame = {};
frame.restore = true;
frame.savedValue = eval(varName);
if (typeof frame.savedValue == "function")
throw(varName +" is a function: " + (typeof frame.savedValue));
this.frame[varName] = frame;
},
/*
* restore any named global variables
*/
restore: function()
{
var varName;
for(varName in this.frame) {
frame = this.frame[varName];
if (frame.restore){
eval(varName+'=frame.savedValue');
frame.restore = false;
}
}
}
};