20.1.3.2-toExponential.js

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// Any copyright is dedicated to the Public Domain.

// http://creativecommons.org/licenses/publicdomain/

//-----------------------------------------------------------------------------

var BUGNUMBER = 818617;

var summary = "ECMAScript 2017 Draft ECMA-262 Section 20.1.3.2: Number.prototype.toExponential";

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

// With NaN, fractionDigits out of range.

assertEq(Number.prototype.toExponential.call(NaN, 555), 'NaN');

// With NaN fractionDigits in range.

assertEq(Number.prototype.toExponential.call(NaN, 5), 'NaN');

// With Infinity, fractionDigits out of range.

assertEq(Number.prototype.toExponential.call(Infinity, 555), 'Infinity');

// With Infinity, fractionDigits in range.

assertEq(Number.prototype.toExponential.call(Infinity, 5), 'Infinity');

// With -Infinity, fractionDigits out of range.

assertEq(Number.prototype.toExponential.call(-Infinity, 555), '-Infinity');

// With -Infinity, fractionDigits in range.

assertEq(Number.prototype.toExponential.call(-Infinity, 5), '-Infinity');

// With NaN, function assigning a value.

let x = 10;

assertEq(Number.prototype.toExponential.call(NaN, { valueOf() { x = 20; return 1; } }), 'NaN');

assertEq(x, 20);

// With NaN, function throwing an exception.

assertThrowsValue(

  () => Number.prototype.toExponential.call(NaN, { valueOf() { throw "hello"; } }),

  "hello");

// Not a number throws TypeError

assertThrowsInstanceOf(() => Number.prototype.toExponential.call("Hello"), TypeError);

if (typeof reportCompare === "function") {

  reportCompare(true, true);