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/**
* Checks that the first two arguments are equal, or are numbers close enough to be considered equal
* based on a specified maximum allowable difference.
*
* @example assert.close(3.141, Math.PI, 0.001);
*
* @param Number actual
* @param Number expected
* @param Number maxDifference (the maximum inclusive difference allowed between the actual and expected numbers)
* @param String message (optional)
*/
function close(actual, expected, maxDifference, message) {
var actualDiff = (actual === expected) ? 0 : Math.abs(actual - expected),
result = actualDiff <= maxDifference;
message = message || (actual + " should be within " + maxDifference + " (inclusive) of " + expected + (result ? "" : ". Actual: " + actualDiff));
QUnit.push(result, actual, expected, message);
}
/**
* Checks that the first two arguments are equal, or are numbers close enough to be considered equal
* based on a specified maximum allowable difference percentage.
*
* @example assert.close.percent(155, 150, 3.4); // Difference is ~3.33%
*
* @param Number actual
* @param Number expected
* @param Number maxPercentDifference (the maximum inclusive difference percentage allowed between the actual and expected numbers)
* @param String message (optional)
*/
close.percent = function closePercent(actual, expected, maxPercentDifference, message) {
var actualDiff, result;
if (actual === expected) {
actualDiff = 0;
result = actualDiff <= maxPercentDifference;
}
else if (actual !== 0 && expected !== 0 && expected !== Infinity && expected !== -Infinity) {
actualDiff = Math.abs(100 * (actual - expected) / expected);
result = actualDiff <= maxPercentDifference;
}
else {
// Dividing by zero (0)! Should return `false` unless the max percentage was `Infinity`
actualDiff = Infinity;
result = maxPercentDifference === Infinity;
}
message = message || (actual + " should be within " + maxPercentDifference + "% (inclusive) of " + expected + (result ? "" : ". Actual: " + actualDiff + "%"));
QUnit.push(result, actual, expected, message);
};
/**
* Checks that the first two arguments are numbers with differences greater than the specified
* minimum difference.
*
* @example assert.notClose(3.1, Math.PI, 0.001);
*
* @param Number actual
* @param Number expected
* @param Number minDifference (the minimum exclusive difference allowed between the actual and expected numbers)
* @param String message (optional)
*/
function notClose(actual, expected, minDifference, message) {
var actualDiff = Math.abs(actual - expected),
result = actualDiff > minDifference;
message = message || (actual + " should not be within " + minDifference + " (exclusive) of " + expected + (result ? "" : ". Actual: " + actualDiff));
QUnit.push(result, actual, expected, message);
}
/**
* Checks that the first two arguments are numbers with differences greater than the specified
* minimum difference percentage.
*
* @example assert.notClose.percent(156, 150, 3.5); // Difference is 4.0%
*
* @param Number actual
* @param Number expected
* @param Number minPercentDifference (the minimum exclusive difference percentage allowed between the actual and expected numbers)
* @param String message (optional)
*/
notClose.percent = function notClosePercent(actual, expected, minPercentDifference, message) {
var actualDiff, result;
if (actual === expected) {
actualDiff = 0;
result = actualDiff > minPercentDifference;
}
else if (actual !== 0 && expected !== 0 && expected !== Infinity && expected !== -Infinity) {
actualDiff = Math.abs(100 * (actual - expected) / expected);
result = actualDiff > minPercentDifference;
}
else {
// Dividing by zero (0)! Should only return `true` if the min percentage was `Infinity`
actualDiff = Infinity;
result = minPercentDifference !== Infinity;
}
message = message || (actual + " should not be within " + minPercentDifference + "% (exclusive) of " + expected + (result ? "" : ". Actual: " + actualDiff + "%"));
QUnit.push(result, actual, expected, message);
};
QUnit.extend(QUnit.assert, {
close: close,
notClose: notClose
});
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