mirror of
https://github.com/MikeMcl/big.js.git
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db8091b580
Add optional rounding mode parameter to `toExponential`, `toFixed` and `toPrecision`. Add a strict mode to disallow imprecise number/Big conversions when `Big.strict = true`. Add `toNumber` method. Add `prec` method to round a Big to a specified number of significant digits. Add version selector to API documentation. Change `toJSON` to return exponential format. Remove *big.min.js*. Remove `Big.version`. Rename *doc* folder to *docs* to use it as the Github publishing source. Add legacy API documentation to *docs*. Add *README* to *perf* directory. Refactor test suite, and add `toNumber` and `prec` tests. Update *README*.
118 lines
2.5 KiB
JavaScript
118 lines
2.5 KiB
JavaScript
if (typeof test === 'undefined') require('../test');
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test('toNumber', function () {
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var t;
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Big.NE = -7;
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Big.PE = 21;
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Big.strict = false;
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// Positive zero
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t = function (value) {
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test.isTrue(1 / new Big(value).toNumber() === Infinity);
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};
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t(0);
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t('0');
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t('0.0');
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t('0.000000000000');
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t('0e+0');
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t('0e-0');
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// Negative zero
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t = function (value) {
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test.isTrue(1 / new Big(value).toNumber() === -Infinity);
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};
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t(-0);
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t('-0');
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t('-0.0');
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t('-0.000000000000');
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t('-0e+0');
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t('-0e-0');
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t = function (value, expected) {
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test.areEqual(new Big(value).toNumber(), expected);
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};
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t(0, 0);
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t(-0, -0);
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t('0', 0);
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t('-0', -0);
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t(1, 1);
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t('1', 1);
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t('1.0', 1);
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t('1e+0', 1);
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t('1e-0', 1);
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t(-1, -1);
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t('-1', -1);
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t('-1.0', -1);
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t('-1e+0', -1);
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t('-1e-0', -1);
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t('123.456789876543', 123.456789876543);
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t('-123.456789876543', -123.456789876543);
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t('1.1102230246251565e-16', 1.1102230246251565e-16);
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t('-1.1102230246251565e-16', -1.1102230246251565e-16);
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t('9007199254740991', 9007199254740991);
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t('-9007199254740991', -9007199254740991);
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t('5e-324', 5e-324);
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t('1.7976931348623157e+308', 1.7976931348623157e+308);
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t('0.00999', 0.00999);
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t('123.456789', 123.456789);
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t('1.23456789876543', 1.23456789876543);
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t(Number.MAX_SAFE_INTEGER, Number.MAX_SAFE_INTEGER);
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var n = '1.000000000000000000001';
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t(n, 1);
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Big.strict = true;
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test.isException(function () {new Big(n).toNumber()}, "new Big(n).toNumber()");
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test.isException(function () {new Big(0).toNumber()}, "new Big(0).toNumber()");
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test.isException(function () {new Big(-0).toNumber()}, "new Big(-0).toNumber()");
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test.isException(function () {new Big(1).toNumber()}, "new Big(1).toNumber()");
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test.isException(function () {new Big(-1).toNumber()}, "new Big(-1).toNumber()");
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t('0', 0);
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t('-0', -0);
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t('1', 1);
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t('1.0', 1);
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t('1e+0', 1);
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t('1e-0', 1);
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t('-1', -1);
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t('-1.0', -1);
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t('-1e+0', -1);
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t('-1e-0', -1);
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t('123.456789876543', 123.456789876543);
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t('-123.456789876543', -123.456789876543);
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t('1.1102230246251565e-16', 1.1102230246251565e-16);
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t('-1.1102230246251565e-16', -1.1102230246251565e-16);
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t('9007199254740991', 9007199254740991);
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t('-9007199254740991', -9007199254740991);
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t('5e-324', 5e-324);
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t('1.7976931348623157e+308', 1.7976931348623157e+308);
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t('0.00999', 0.00999);
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t('123.456789', 123.456789);
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t('1.23456789876543', 1.23456789876543);
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Big.strict = false;
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});
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