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131 lines
8.2 KiB
131 lines
8.2 KiB
'use strict'; |
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var test = require('tape'); |
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var toPrimitive = require('../es6'); |
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var is = require('object-is'); |
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var forEach = require('foreach'); |
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var debug = require('util').inspect; |
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var hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol'; |
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var hasSymbolToPrimitive = hasSymbols && typeof Symbol.toPrimitive === 'symbol'; |
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var primitives = [null, undefined, true, false, 0, -0, 42, NaN, Infinity, -Infinity, '', 'abc']; |
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test('primitives', function (t) { |
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forEach(primitives, function (i) { |
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t.ok(is(toPrimitive(i), i), 'toPrimitive(' + debug(i) + ') returns the same value'); |
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t.ok(is(toPrimitive(i, String), i), 'toPrimitive(' + debug(i) + ', String) returns the same value'); |
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t.ok(is(toPrimitive(i, Number), i), 'toPrimitive(' + debug(i) + ', Number) returns the same value'); |
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}); |
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t.end(); |
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}); |
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test('Symbols', { skip: !hasSymbols }, function (t) { |
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var symbols = [Symbol(), Symbol.iterator, Symbol.for('foo')]; |
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forEach(symbols, function (sym) { |
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t.equal(toPrimitive(sym), sym, 'toPrimitive(' + debug(sym) + ') returns the same value'); |
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t.equal(toPrimitive(sym, String), sym, 'toPrimitive(' + debug(sym) + ', String) returns the same value'); |
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t.equal(toPrimitive(sym, Number), sym, 'toPrimitive(' + debug(sym) + ', Number) returns the same value'); |
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}); |
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var primitiveSym = Symbol('primitiveSym'); |
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var objectSym = Object(primitiveSym); |
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t.equal(toPrimitive(objectSym), primitiveSym, 'toPrimitive(' + debug(objectSym) + ') returns ' + debug(primitiveSym)); |
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t.equal(toPrimitive(objectSym, String), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', String) returns ' + debug(primitiveSym)); |
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t.equal(toPrimitive(objectSym, Number), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', Number) returns ' + debug(primitiveSym)); |
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t.end(); |
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}); |
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test('Arrays', function (t) { |
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var arrays = [[], ['a', 'b'], [1, 2]]; |
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forEach(arrays, function (arr) { |
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t.equal(toPrimitive(arr), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array'); |
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t.equal(toPrimitive(arr, String), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array'); |
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t.equal(toPrimitive(arr, Number), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array'); |
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}); |
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t.end(); |
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}); |
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test('Dates', function (t) { |
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var dates = [new Date(), new Date(0), new Date(NaN)]; |
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forEach(dates, function (date) { |
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t.equal(toPrimitive(date), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date'); |
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t.equal(toPrimitive(date, String), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date'); |
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t.ok(is(toPrimitive(date, Number), Number(date)), 'toPrimitive(' + debug(date) + ') returns the number version of the date'); |
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}); |
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t.end(); |
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}); |
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var coercibleObject = { valueOf: function () { return 3; }, toString: function () { return 42; } }; |
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var valueOfOnlyObject = { valueOf: function () { return 4; }, toString: function () { return {}; } }; |
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var toStringOnlyObject = { valueOf: function () { return {}; }, toString: function () { return 7; } }; |
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var coercibleFnObject = { valueOf: function () { return function valueOfFn() {}; }, toString: function () { return 42; } }; |
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var uncoercibleObject = { valueOf: function () { return {}; }, toString: function () { return {}; } }; |
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var uncoercibleFnObject = { valueOf: function () { return function valueOfFn() {}; }, toString: function () { return function toStrFn() {}; } }; |
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test('Objects', function (t) { |
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t.equal(toPrimitive(coercibleObject), coercibleObject.valueOf(), 'coercibleObject with no hint coerces to valueOf'); |
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t.equal(toPrimitive(coercibleObject, Number), coercibleObject.valueOf(), 'coercibleObject with hint Number coerces to valueOf'); |
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t.equal(toPrimitive(coercibleObject, String), coercibleObject.toString(), 'coercibleObject with hint String coerces to non-stringified toString'); |
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t.equal(toPrimitive(coercibleFnObject), coercibleFnObject.toString(), 'coercibleFnObject coerces to non-stringified toString'); |
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t.equal(toPrimitive(coercibleFnObject, Number), coercibleFnObject.toString(), 'coercibleFnObject with hint Number coerces to non-stringified toString'); |
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t.equal(toPrimitive(coercibleFnObject, String), coercibleFnObject.toString(), 'coercibleFnObject with hint String coerces to non-stringified toString'); |
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t.equal(toPrimitive({}), '[object Object]', '{} with no hint coerces to Object#toString'); |
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t.equal(toPrimitive({}, Number), '[object Object]', '{} with hint Number coerces to Object#toString'); |
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t.equal(toPrimitive({}, String), '[object Object]', '{} with hint String coerces to Object#toString'); |
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t.equal(toPrimitive(toStringOnlyObject), toStringOnlyObject.toString(), 'toStringOnlyObject returns non-stringified toString'); |
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t.equal(toPrimitive(toStringOnlyObject, Number), toStringOnlyObject.toString(), 'toStringOnlyObject with hint Number returns non-stringified toString'); |
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t.equal(toPrimitive(toStringOnlyObject, String), toStringOnlyObject.toString(), 'toStringOnlyObject with hint String returns non-stringified toString'); |
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t.equal(toPrimitive(valueOfOnlyObject), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject returns valueOf'); |
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t.equal(toPrimitive(valueOfOnlyObject, Number), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint Number returns valueOf'); |
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t.equal(toPrimitive(valueOfOnlyObject, String), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint String returns non-stringified valueOf'); |
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t.test('Symbol.toPrimitive', { skip: !hasSymbolToPrimitive }, function (st) { |
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var overriddenObject = { toString: st.fail, valueOf: st.fail }; |
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overriddenObject[Symbol.toPrimitive] = function (hint) { return String(hint); }; |
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st.equal(toPrimitive(overriddenObject), 'default', 'object with Symbol.toPrimitive + no hint invokes that'); |
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st.equal(toPrimitive(overriddenObject, Number), 'number', 'object with Symbol.toPrimitive + hint Number invokes that'); |
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st.equal(toPrimitive(overriddenObject, String), 'string', 'object with Symbol.toPrimitive + hint String invokes that'); |
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var nullToPrimitive = { toString: coercibleObject.toString, valueOf: coercibleObject.valueOf }; |
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nullToPrimitive[Symbol.toPrimitive] = null; |
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st.equal(toPrimitive(nullToPrimitive), toPrimitive(coercibleObject), 'object with no hint + null Symbol.toPrimitive ignores it'); |
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st.equal(toPrimitive(nullToPrimitive, Number), toPrimitive(coercibleObject, Number), 'object with hint Number + null Symbol.toPrimitive ignores it'); |
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st.equal(toPrimitive(nullToPrimitive, String), toPrimitive(coercibleObject, String), 'object with hint String + null Symbol.toPrimitive ignores it'); |
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st.test('exceptions', function (sst) { |
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var nonFunctionToPrimitive = { toString: sst.fail, valueOf: sst.fail }; |
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nonFunctionToPrimitive[Symbol.toPrimitive] = {}; |
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sst['throws'](toPrimitive.bind(null, nonFunctionToPrimitive), TypeError, 'Symbol.toPrimitive returning a non-function throws'); |
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var uncoercibleToPrimitive = { toString: sst.fail, valueOf: sst.fail }; |
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uncoercibleToPrimitive[Symbol.toPrimitive] = function (hint) { return { toString: function () { return hint; } }; }; |
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sst['throws'](toPrimitive.bind(null, uncoercibleToPrimitive), TypeError, 'Symbol.toPrimitive returning an object throws'); |
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var throwingToPrimitive = { toString: sst.fail, valueOf: sst.fail }; |
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throwingToPrimitive[Symbol.toPrimitive] = function (hint) { throw new RangeError(hint); }; |
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sst['throws'](toPrimitive.bind(null, throwingToPrimitive), RangeError, 'Symbol.toPrimitive throwing throws'); |
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sst.end(); |
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}); |
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st.end(); |
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}); |
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t.test('exceptions', function (st) { |
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st['throws'](toPrimitive.bind(null, uncoercibleObject), TypeError, 'uncoercibleObject throws a TypeError'); |
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st['throws'](toPrimitive.bind(null, uncoercibleObject, Number), TypeError, 'uncoercibleObject with hint Number throws a TypeError'); |
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st['throws'](toPrimitive.bind(null, uncoercibleObject, String), TypeError, 'uncoercibleObject with hint String throws a TypeError'); |
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st['throws'](toPrimitive.bind(null, uncoercibleFnObject), TypeError, 'uncoercibleFnObject throws a TypeError'); |
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st['throws'](toPrimitive.bind(null, uncoercibleFnObject, Number), TypeError, 'uncoercibleFnObject with hint Number throws a TypeError'); |
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st['throws'](toPrimitive.bind(null, uncoercibleFnObject, String), TypeError, 'uncoercibleFnObject with hint String throws a TypeError'); |
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st.end(); |
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}); |
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t.end(); |
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});
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