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Attempt again to ensure again _.toInteger converts Infinity to an integer.

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This commit is contained in:
John-David Dalton
2015-09-15 23:41:53 -07:00
parent eb57e522aa
commit 00d26a6419
2 changed files with 14 additions and 13 deletions
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11
lodash.js
View File

@@ -51,7 +51,7 @@
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0,
MAX_SAFE_INTEGER = 9007199254740991,
MAX_VALUE = 1.7976931348623157e308;
MAX_INTEGER = 1e308;
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295,
@@ -9072,13 +9072,12 @@
* // => 0
*
* _.toInteger(-Infinity)
* // => -Number.MAX_VALUE
* // => -1e308
*/
function toInteger(value) {
var result = nativeFloor(value) || 0;
return result == INFINITY
? MAX_VALUE
: (result == -INFINITY ? -MAX_VALUE : result);
return (value == INFINITY || value == -INFINITY)
? (value < 0 ? -1 : 1) * MAX_INTEGER
: (value - (value % 1)) || 0;
}
/**

16
test/test.js
View File

@@ -12,12 +12,13 @@
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';
/** Used as references for the max length and index of an array. */
var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991,
MAX_INTEGER = 1e308;
/** Used as the maximum length an array-like object. */
var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295,
MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
/** `Object#toString` result references. */
var funcTag = '[object Function]',
@@ -18430,12 +18431,13 @@
(function() {
QUnit.test('should convert values to integers', function(assert) {
assert.expect(4);
assert.expect(5);
assert.strictEqual(_.toInteger('3.14'), 3);
assert.strictEqual(_.toInteger(), 0);
assert.strictEqual(_.toInteger(NaN), 0);
assert.strictEqual(_.toInteger(-Infinity), -1.7976931348623157e+308);
assert.strictEqual(_.toInteger(Infinity), MAX_INTEGER);
assert.strictEqual(_.toInteger(-Infinity), -MAX_INTEGER);
});
}());