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'use strict';
/*
* This file tests the FSM test framework.
*/
load('jstests/concurrency/fsm_libs/fsm.js');
(function() {
var getWeightedRandomChoice = fsm._getWeightedRandomChoice;
var doc = {
a: 0.25,
b: 0.5,
c: 0.25
};
// NOTE: getWeightedRandomChoice calls assert internally, so it will print stack traces
// when assert.throws executes
assert.throws(function() { getWeightedRandomChoice(doc, -1); }, [],
'should reject negative values');
assert.throws(function() { getWeightedRandomChoice(doc, 1); }, [],
'should reject values == 1');
assert.throws(function() { getWeightedRandomChoice(doc, 2); }, [],
'should reject values > 1');
assert.throws(function() { getWeightedRandomChoice({}, 0.0); }, [],
'cannot choose from zero states');
assert.throws(function() { getWeightedRandomChoice({}, 0.5); }, [],
'cannot choose from zero states');
assert.throws(function() { getWeightedRandomChoice({}, 0.99); }, [],
'cannot choose from zero states');
assert.eq('a', getWeightedRandomChoice(doc, 0.00), '0');
assert.eq('a', getWeightedRandomChoice(doc, 0.24), '1');
assert.eq('b', getWeightedRandomChoice(doc, 0.25), '2');
assert.eq('b', getWeightedRandomChoice(doc, 0.50), '3');
assert.eq('b', getWeightedRandomChoice(doc, 0.74), '4');
assert.eq('c', getWeightedRandomChoice(doc, 0.75), '5');
assert.eq('c', getWeightedRandomChoice(doc, 0.99), '6');
})();
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