17 files changed, 896 insertions, 0 deletions
diff --git a/src/node_modules/es-to-primitive/.eslintrc b/src/node_modules/es-to-primitive/.eslintrc
new file mode 100644
index 0000000..b6639b9
--- /dev/null
+++ b/src/node_modules/es-to-primitive/.eslintrc
@@ -0,0 +1,22 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"rules": {
+		"complexity": [2, 14],
+		"func-name-matching": 0,
+		"id-length": [2, { "min": 1, "max": 24, "properties": "never" }],
+		"max-statements": [2, 20],
+		"new-cap": [2, { "capIsNewExceptions": ["GetMethod"] }]
+	},
+
+	"overrides": [
+		{
+			"files": "test/**",
+			"rules": {
+				"max-lines-per-function": [2, { "max": 68 }],
+			},
+		}
+	],
+}
diff --git a/src/node_modules/es-to-primitive/.github/FUNDING.yml b/src/node_modules/es-to-primitive/.github/FUNDING.yml
new file mode 100644
index 0000000..9f928ae
--- /dev/null
+++ b/src/node_modules/es-to-primitive/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [ljharb]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/es-to-primitive
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/src/node_modules/es-to-primitive/.travis.yml b/src/node_modules/es-to-primitive/.travis.yml
new file mode 100644
index 0000000..d4c5a84
--- /dev/null
+++ b/src/node_modules/es-to-primitive/.travis.yml
@@ -0,0 +1,15 @@
+version: ~> 1.0
+language: node_js
+cache:
+  directories:
+    - "$(nvm cache dir)"
+os:
+ - linux
+import:
+ - ljharb/travis-ci:node/all.yml
+ - ljharb/travis-ci:node/pretest.yml
+ - ljharb/travis-ci:node/posttest.yml
+ - ljharb/travis-ci:node/coverage.yml
+matrix:
+  allow_failures:
+    - env: COVERAGE=true
diff --git a/src/node_modules/es-to-primitive/CHANGELOG.md b/src/node_modules/es-to-primitive/CHANGELOG.md
new file mode 100644
index 0000000..0a5dda7
--- /dev/null
+++ b/src/node_modules/es-to-primitive/CHANGELOG.md
@@ -0,0 +1,49 @@
+1.2.1 / 2019-11-08
+=================
+  * [readme] remove testling URLs
+  * [meta] add `funding` field
+  * [meta] create FUNDING.yml
+  * [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `covert`, `replace`, `semver`, `tape`, `function.prototype.name`
+  * [Tests] use shared travis-ci configs
+  * [Tests] Add es5 tests for `symbol` types (#45)
+  * [Tests] use `npx aud` instead of `nsp` or `npm audit` with hoops
+  * [Tests] remove `jscs`
+
+1.2.0 / 2018-09-27
+=================
+  * [New] create ES2015 entry point/property, to replace ES6
+  * [Fix] Ensure optional arguments are not part of the length (#29)
+  * [Deps] update `is-callable`
+  * [Dev Deps] update `tape`, `jscs`, `nsp`, `eslint`, `@ljharb/eslint-config`, `semver`, `object-inspect`, `replace`
+  * [Tests] avoid util.inspect bug with `new Date(NaN)` on node v6.0 and v6.1.
+  * [Tests] up to `node` `v10.11`, `v9.11`, `v8.12`, `v6.14`, `v4.9`
+
+1.1.1 / 2016-01-03
+=================
+  * [Fix: ES5] fix coercion logic: ES5’s ToPrimitive does not coerce any primitive value, regardless of hint (#2)
+
+1.1.0 / 2015-12-27
+=================
+  * [New] add `Symbol.toPrimitive` support
+  * [Deps] update `is-callable`, `is-date-object`
+  * [Dev Deps] update `eslint`, `tape`, `semver`, `jscs`, `covert`, `nsp`, `@ljharb/eslint-config`
+  * [Dev Deps] remove unused deps
+  * [Tests] up to `node` `v5.3`
+  * [Tests] fix npm upgrades on older node versions
+  * [Tests] fix testling
+  * [Docs] Switch from vb.teelaun.ch to versionbadg.es for the npm version badge SVG
+
+1.0.1 / 2016-01-03
+=================
+  * [Fix: ES5] fix coercion logic: ES5’s ToPrimitive does not coerce any primitive value, regardless of hint (#2)
+  * [Deps] update `is-callable`, `is-date-object`
+  * [Dev Deps] update `eslint`, `tape`, `semver`, `jscs`, `covert`, `nsp`, `@ljharb/eslint-config`
+  * [Dev Deps] remove unused deps
+  * [Tests] up to `node` `v5.3`
+  * [Tests] fix npm upgrades on older node versions
+  * [Tests] fix testling
+  * [Docs] Switch from vb.teelaun.ch to versionbadg.es for the npm version badge SVG
+
+1.0.0 / 2015-03-19
+=================
+  * Initial release.
diff --git a/src/node_modules/es-to-primitive/LICENSE b/src/node_modules/es-to-primitive/LICENSE
new file mode 100644
index 0000000..b43df44
--- /dev/null
+++ b/src/node_modules/es-to-primitive/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Jordan Harband
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/src/node_modules/es-to-primitive/Makefile b/src/node_modules/es-to-primitive/Makefile
new file mode 100644
index 0000000..b9e4fe1
--- /dev/null
+++ b/src/node_modules/es-to-primitive/Makefile
@@ -0,0 +1,61 @@
+# Since we rely on paths relative to the makefile location, abort if make isn't being run from there.
+$(if $(findstring /,$(MAKEFILE_LIST)),$(error Please only invoke this makefile from the directory it resides in))
+
+	# The files that need updating when incrementing the version number.
+VERSIONED_FILES := *.js *.json README*
+
+
+# Add the local npm packages' bin folder to the PATH, so that `make` can find them, when invoked directly.
+# Note that rather than using `$(npm bin)` the 'node_modules/.bin' path component is hard-coded, so that invocation works even from an environment
+# where npm is (temporarily) unavailable due to having deactivated an nvm instance loaded into the calling shell in order to avoid interference with tests.
+export PATH := $(shell printf '%s' "$$PWD/node_modules/.bin:$$PATH")
+UTILS := semver
+# Make sure that all required utilities can be located.
+UTIL_CHECK := $(or $(shell PATH="$(PATH)" which $(UTILS) >/dev/null && echo 'ok'),$(error Did you forget to run `npm install` after cloning the repo? At least one of the required supporting utilities not found: $(UTILS)))
+
+# Default target (by virtue of being the first non '.'-prefixed in the file).
+.PHONY: _no-target-specified
+_no-target-specified:
+	$(error Please specify the target to make - `make list` shows targets. Alternatively, use `npm test` to run the default tests; `npm run` shows all tests)
+
+# Lists all targets defined in this makefile.
+.PHONY: list
+list:
+	@$(MAKE) -pRrn : -f $(MAKEFILE_LIST) 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | command grep -v -e '^[^[:alnum:]]' -e '^$@$$command ' | sort
+
+# All-tests target: invokes the specified test suites for ALL shells defined in $(SHELLS).
+.PHONY: test
+test:
+	@npm test
+
+.PHONY: _ensure-tag
+_ensure-tag:
+ifndef TAG
+	$(error Please invoke with `make TAG=<new-version> release`, where <new-version> is either an increment specifier (patch, minor, major, prepatch, preminor, premajor, prerelease), or an explicit major.minor.patch version number)
+endif
+
+CHANGELOG_ERROR = $(error No CHANGELOG specified)
+.PHONY: _ensure-changelog
+_ensure-changelog:
+	@ (git status -sb --porcelain | command grep -E '^( M|[MA] ) CHANGELOG.md' > /dev/null) || (echo no CHANGELOG.md specified && exit 2)
+
+# Ensures that the git workspace is clean.
+.PHONY: _ensure-clean
+_ensure-clean:
+	@[ -z "$$((git status --porcelain --untracked-files=no || echo err) | command grep -v 'CHANGELOG.md')" ] || { echo "Workspace is not clean; please commit changes first." >&2; exit 2; }
+
+# Makes a release; invoke with `make TAG=<versionOrIncrementSpec> release`.
+.PHONY: release
+release: _ensure-tag _ensure-changelog _ensure-clean
+	@old_ver=`git describe --abbrev=0 --tags --match 'v[0-9]*.[0-9]*.[0-9]*'` || { echo "Failed to determine current version." >&2; exit 1; }; old_ver=$${old_ver#v}; \
+	 new_ver=`echo "$(TAG)" | sed 's/^v//'`; new_ver=$${new_ver:-patch}; \
+	 if printf "$$new_ver" | command grep -q '^[0-9]'; then \
+	   semver "$$new_ver" >/dev/null || { echo 'Invalid version number specified: $(TAG) - must be major.minor.patch' >&2; exit 2; }; \
+	   semver -r "> $$old_ver" "$$new_ver" >/dev/null || { echo 'Invalid version number specified: $(TAG) - must be HIGHER than current one.' >&2; exit 2; } \
+	 else \
+	   new_ver=`semver -i "$$new_ver" "$$old_ver"` || { echo 'Invalid version-increment specifier: $(TAG)' >&2; exit 2; } \
+	 fi; \
+	 printf "=== Bumping version **$$old_ver** to **$$new_ver** before committing and tagging:\n=== TYPE 'proceed' TO PROCEED, anything else to abort: " && read response && [ "$$response" = 'proceed' ] || { echo 'Aborted.' >&2; exit 2; };  \
+	 replace "$$old_ver" "$$new_ver" -- $(VERSIONED_FILES) && \
+	 git commit -m "v$$new_ver" $(VERSIONED_FILES) CHANGELOG.md && \
+	 git tag -a -m "v$$new_ver" "v$$new_ver"
diff --git a/src/node_modules/es-to-primitive/README.md b/src/node_modules/es-to-primitive/README.md
new file mode 100644
index 0000000..5ce322b
--- /dev/null
+++ b/src/node_modules/es-to-primitive/README.md
@@ -0,0 +1,49 @@
+# es-to-primitive <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
+
+[![Build Status][travis-svg]][travis-url]
+[![dependency status][deps-svg]][deps-url]
+[![dev dependency status][dev-deps-svg]][dev-deps-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][npm-badge-png]][package-url]
+
+ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
+When different versions of the spec conflict, the default export will be the latest version of the abstract operation.
+Alternative versions will also be available under an `es5`/`es2015` exported property if you require a specific version.
+
+## Example
+
+```js
+var toPrimitive = require('es-to-primitive');
+var assert = require('assert');
+
+assert(toPrimitive(function () {}) === String(function () {}));
+
+var date = new Date();
+assert(toPrimitive(date) === String(date));
+
+assert(toPrimitive({ valueOf: function () { return 3; } }) === 3);
+
+assert(toPrimitive(['a', 'b', 3]) === String(['a', 'b', 3]));
+
+var sym = Symbol();
+assert(toPrimitive(Object(sym)) === sym);
+```
+
+## Tests
+Simply clone the repo, `npm install`, and run `npm test`
+
+[package-url]: https://npmjs.org/package/es-to-primitive
+[npm-version-svg]: http://versionbadg.es/ljharb/es-to-primitive.svg
+[travis-svg]: https://travis-ci.org/ljharb/es-to-primitive.svg
+[travis-url]: https://travis-ci.org/ljharb/es-to-primitive
+[deps-svg]: https://david-dm.org/ljharb/es-to-primitive.svg
+[deps-url]: https://david-dm.org/ljharb/es-to-primitive
+[dev-deps-svg]: https://david-dm.org/ljharb/es-to-primitive/dev-status.svg
+[dev-deps-url]: https://david-dm.org/ljharb/es-to-primitive#info=devDependencies
+[npm-badge-png]: https://nodei.co/npm/es-to-primitive.png?downloads=true&stars=true
+[license-image]: http://img.shields.io/npm/l/es-to-primitive.svg
+[license-url]: LICENSE
+[downloads-image]: http://img.shields.io/npm/dm/es-to-primitive.svg
+[downloads-url]: http://npm-stat.com/charts.html?package=es-to-primitive
diff --git a/src/node_modules/es-to-primitive/es2015.js b/src/node_modules/es-to-primitive/es2015.js
new file mode 100644
index 0000000..4a11a34
--- /dev/null
+++ b/src/node_modules/es-to-primitive/es2015.js
@@ -0,0 +1,75 @@
+'use strict';
+
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
+
+var isPrimitive = require('./helpers/isPrimitive');
+var isCallable = require('is-callable');
+var isDate = require('is-date-object');
+var isSymbol = require('is-symbol');
+
+var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {
+	if (typeof O === 'undefined' || O === null) {
+		throw new TypeError('Cannot call method on ' + O);
+	}
+	if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
+		throw new TypeError('hint must be "string" or "number"');
+	}
+	var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
+	var method, result, i;
+	for (i = 0; i < methodNames.length; ++i) {
+		method = O[methodNames[i]];
+		if (isCallable(method)) {
+			result = method.call(O);
+			if (isPrimitive(result)) {
+				return result;
+			}
+		}
+	}
+	throw new TypeError('No default value');
+};
+
+var GetMethod = function GetMethod(O, P) {
+	var func = O[P];
+	if (func !== null && typeof func !== 'undefined') {
+		if (!isCallable(func)) {
+			throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
+		}
+		return func;
+	}
+	return void 0;
+};
+
+// http://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
+module.exports = function ToPrimitive(input) {
+	if (isPrimitive(input)) {
+		return input;
+	}
+	var hint = 'default';
+	if (arguments.length > 1) {
+		if (arguments[1] === String) {
+			hint = 'string';
+		} else if (arguments[1] === Number) {
+			hint = 'number';
+		}
+	}
+
+	var exoticToPrim;
+	if (hasSymbols) {
+		if (Symbol.toPrimitive) {
+			exoticToPrim = GetMethod(input, Symbol.toPrimitive);
+		} else if (isSymbol(input)) {
+			exoticToPrim = Symbol.prototype.valueOf;
+		}
+	}
+	if (typeof exoticToPrim !== 'undefined') {
+		var result = exoticToPrim.call(input, hint);
+		if (isPrimitive(result)) {
+			return result;
+		}
+		throw new TypeError('unable to convert exotic object to primitive');
+	}
+	if (hint === 'default' && (isDate(input) || isSymbol(input))) {
+		hint = 'string';
+	}
+	return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);
+};
diff --git a/src/node_modules/es-to-primitive/es5.js b/src/node_modules/es-to-primitive/es5.js
new file mode 100644
index 0000000..602aa36
--- /dev/null
+++ b/src/node_modules/es-to-primitive/es5.js
@@ -0,0 +1,45 @@
+'use strict';
+
+var toStr = Object.prototype.toString;
+
+var isPrimitive = require('./helpers/isPrimitive');
+
+var isCallable = require('is-callable');
+
+// http://ecma-international.org/ecma-262/5.1/#sec-8.12.8
+var ES5internalSlots = {
+	'[[DefaultValue]]': function (O) {
+		var actualHint;
+		if (arguments.length > 1) {
+			actualHint = arguments[1];
+		} else {
+			actualHint = toStr.call(O) === '[object Date]' ? String : Number;
+		}
+
+		if (actualHint === String || actualHint === Number) {
+			var methods = actualHint === String ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
+			var value, i;
+			for (i = 0; i < methods.length; ++i) {
+				if (isCallable(O[methods[i]])) {
+					value = O[methods[i]]();
+					if (isPrimitive(value)) {
+						return value;
+					}
+				}
+			}
+			throw new TypeError('No default value');
+		}
+		throw new TypeError('invalid [[DefaultValue]] hint supplied');
+	}
+};
+
+// http://ecma-international.org/ecma-262/5.1/#sec-9.1
+module.exports = function ToPrimitive(input) {
+	if (isPrimitive(input)) {
+		return input;
+	}
+	if (arguments.length > 1) {
+		return ES5internalSlots['[[DefaultValue]]'](input, arguments[1]);
+	}
+	return ES5internalSlots['[[DefaultValue]]'](input);
+};
diff --git a/src/node_modules/es-to-primitive/es6.js b/src/node_modules/es-to-primitive/es6.js
new file mode 100644
index 0000000..2d1f4dc
--- /dev/null
+++ b/src/node_modules/es-to-primitive/es6.js
@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = require('./es2015');
diff --git a/src/node_modules/es-to-primitive/helpers/isPrimitive.js b/src/node_modules/es-to-primitive/helpers/isPrimitive.js
new file mode 100644
index 0000000..06f0bf0
--- /dev/null
+++ b/src/node_modules/es-to-primitive/helpers/isPrimitive.js
@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = function isPrimitive(value) {
+	return value === null || (typeof value !== 'function' && typeof value !== 'object');
+};
diff --git a/src/node_modules/es-to-primitive/index.js b/src/node_modules/es-to-primitive/index.js
new file mode 100644
index 0000000..e60d912
--- /dev/null
+++ b/src/node_modules/es-to-primitive/index.js
@@ -0,0 +1,17 @@
+'use strict';
+
+var ES5 = require('./es5');
+var ES6 = require('./es6');
+var ES2015 = require('./es2015');
+
+if (Object.defineProperty) {
+	Object.defineProperty(ES2015, 'ES5', { enumerable: false, value: ES5 });
+	Object.defineProperty(ES2015, 'ES6', { enumerable: false, value: ES6 });
+	Object.defineProperty(ES2015, 'ES2015', { enumerable: false, value: ES2015 });
+} else {
+	ES6.ES5 = ES5;
+	ES6.ES6 = ES6;
+	ES6.ES2015 = ES2015;
+}
+
+module.exports = ES2015;
diff --git a/src/node_modules/es-to-primitive/package.json b/src/node_modules/es-to-primitive/package.json
new file mode 100644
index 0000000..136f877
--- /dev/null
+++ b/src/node_modules/es-to-primitive/package.json
@@ -0,0 +1,81 @@
+{
+	"name": "es-to-primitive",
+	"version": "1.2.1",
+	"author": "Jordan Harband <ljharb@gmail.com>",
+	"funding": {
+		"url": "https://github.com/sponsors/ljharb"
+	},
+	"description": "ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.",
+	"license": "MIT",
+	"main": "index.js",
+	"scripts": {
+		"pretest": "npm run --silent lint",
+		"test": "npm run --silent tests-only",
+		"posttest": "npx aud",
+		"tests-only": "node --es-staging test",
+		"coverage": "covert test/*.js",
+		"coverage-quiet": "covert test/*.js --quiet",
+		"lint": "eslint ."
+	},
+	"repository": {
+		"type": "git",
+		"url": "git://github.com/ljharb/es-to-primitive.git"
+	},
+	"keywords": [
+		"primitive",
+		"abstract",
+		"ecmascript",
+		"es5",
+		"es6",
+		"es2015",
+		"toPrimitive",
+		"coerce",
+		"type",
+		"object",
+		"string",
+		"number",
+		"boolean",
+		"symbol",
+		"null",
+		"undefined"
+	],
+	"dependencies": {
+		"is-callable": "^1.1.4",
+		"is-date-object": "^1.0.1",
+		"is-symbol": "^1.0.2"
+	},
+	"devDependencies": {
+		"@ljharb/eslint-config": "^15.0.0",
+		"covert": "^1.1.1",
+		"eslint": "^6.6.0",
+		"foreach": "^2.0.5",
+		"function.prototype.name": "^1.1.1",
+		"has-symbols": "^1.0.0",
+		"object-inspect": "^1.6.0",
+		"object-is": "^1.0.1",
+		"replace": "^1.1.1",
+		"semver": "^6.3.0",
+		"tape": "^4.11.0"
+	},
+	"testling": {
+		"files": "test",
+		"browsers": [
+			"iexplore/6.0..latest",
+			"firefox/3.0..6.0",
+			"firefox/15.0..latest",
+			"firefox/nightly",
+			"chrome/4.0..10.0",
+			"chrome/20.0..latest",
+			"chrome/canary",
+			"opera/10.0..latest",
+			"opera/next",
+			"safari/4.0..latest",
+			"ipad/6.0..latest",
+			"iphone/6.0..latest",
+			"android-browser/4.2"
+		]
+	},
+	"engines": {
+		"node": ">= 0.4"
+	}
+}
diff --git a/src/node_modules/es-to-primitive/test/es2015.js b/src/node_modules/es-to-primitive/test/es2015.js
new file mode 100644
index 0000000..80f4083
--- /dev/null
+++ b/src/node_modules/es-to-primitive/test/es2015.js
@@ -0,0 +1,151 @@
+'use strict';
+
+var test = require('tape');
+var toPrimitive = require('../es2015');
+var is = require('object-is');
+var forEach = require('foreach');
+var functionName = require('function.prototype.name');
+var debug = require('object-inspect');
+
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
+var hasSymbolToPrimitive = hasSymbols && typeof Symbol.toPrimitive === 'symbol';
+
+test('function properties', function (t) {
+	t.equal(toPrimitive.length, 1, 'length is 1');
+	t.equal(functionName(toPrimitive), 'ToPrimitive', 'name is ToPrimitive');
+
+	t.end();
+});
+
+var primitives = [null, undefined, true, false, 0, -0, 42, NaN, Infinity, -Infinity, '', 'abc'];
+
+test('primitives', function (t) {
+	forEach(primitives, function (i) {
+		t.ok(is(toPrimitive(i), i), 'toPrimitive(' + debug(i) + ') returns the same value');
+		t.ok(is(toPrimitive(i, String), i), 'toPrimitive(' + debug(i) + ', String) returns the same value');
+		t.ok(is(toPrimitive(i, Number), i), 'toPrimitive(' + debug(i) + ', Number) returns the same value');
+	});
+	t.end();
+});
+
+test('Symbols', { skip: !hasSymbols }, function (t) {
+	var symbols = [
+		Symbol('foo'),
+		Symbol.iterator,
+		Symbol['for']('foo') // eslint-disable-line no-restricted-properties
+	];
+	forEach(symbols, function (sym) {
+		t.equal(toPrimitive(sym), sym, 'toPrimitive(' + debug(sym) + ') returns the same value');
+		t.equal(toPrimitive(sym, String), sym, 'toPrimitive(' + debug(sym) + ', String) returns the same value');
+		t.equal(toPrimitive(sym, Number), sym, 'toPrimitive(' + debug(sym) + ', Number) returns the same value');
+	});
+
+	var primitiveSym = Symbol('primitiveSym');
+	var objectSym = Object(primitiveSym);
+	t.equal(toPrimitive(objectSym), primitiveSym, 'toPrimitive(' + debug(objectSym) + ') returns ' + debug(primitiveSym));
+	t.equal(toPrimitive(objectSym, String), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', String) returns ' + debug(primitiveSym));
+	t.equal(toPrimitive(objectSym, Number), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', Number) returns ' + debug(primitiveSym));
+	t.end();
+});
+
+test('Arrays', function (t) {
+	var arrays = [[], ['a', 'b'], [1, 2]];
+	forEach(arrays, function (arr) {
+		t.equal(toPrimitive(arr), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+		t.equal(toPrimitive(arr, String), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+		t.equal(toPrimitive(arr, Number), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+	});
+	t.end();
+});
+
+test('Dates', function (t) {
+	var dates = [new Date(), new Date(0), new Date(NaN)];
+	forEach(dates, function (date) {
+		t.equal(toPrimitive(date), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date');
+		t.equal(toPrimitive(date, String), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date');
+		t.ok(is(toPrimitive(date, Number), Number(date)), 'toPrimitive(' + debug(date) + ') returns the number version of the date');
+	});
+	t.end();
+});
+
+var coercibleObject = { valueOf: function () { return 3; }, toString: function () { return 42; } };
+var valueOfOnlyObject = { valueOf: function () { return 4; }, toString: function () { return {}; } };
+var toStringOnlyObject = { valueOf: function () { return {}; }, toString: function () { return 7; } };
+var coercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return 42; }
+};
+var uncoercibleObject = { valueOf: function () { return {}; }, toString: function () { return {}; } };
+var uncoercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return function toStrFn() {}; }
+};
+
+test('Objects', function (t) {
+	t.equal(toPrimitive(coercibleObject), coercibleObject.valueOf(), 'coercibleObject with no hint coerces to valueOf');
+	t.equal(toPrimitive(coercibleObject, Number), coercibleObject.valueOf(), 'coercibleObject with hint Number coerces to valueOf');
+	t.equal(toPrimitive(coercibleObject, String), coercibleObject.toString(), 'coercibleObject with hint String coerces to non-stringified toString');
+
+	t.equal(toPrimitive(coercibleFnObject), coercibleFnObject.toString(), 'coercibleFnObject coerces to non-stringified toString');
+	t.equal(toPrimitive(coercibleFnObject, Number), coercibleFnObject.toString(), 'coercibleFnObject with hint Number coerces to non-stringified toString');
+	t.equal(toPrimitive(coercibleFnObject, String), coercibleFnObject.toString(), 'coercibleFnObject with hint String coerces to non-stringified toString');
+
+	t.equal(toPrimitive({}), '[object Object]', '{} with no hint coerces to Object#toString');
+	t.equal(toPrimitive({}, Number), '[object Object]', '{} with hint Number coerces to Object#toString');
+	t.equal(toPrimitive({}, String), '[object Object]', '{} with hint String coerces to Object#toString');
+
+	t.equal(toPrimitive(toStringOnlyObject), toStringOnlyObject.toString(), 'toStringOnlyObject returns non-stringified toString');
+	t.equal(toPrimitive(toStringOnlyObject, Number), toStringOnlyObject.toString(), 'toStringOnlyObject with hint Number returns non-stringified toString');
+	t.equal(toPrimitive(toStringOnlyObject, String), toStringOnlyObject.toString(), 'toStringOnlyObject with hint String returns non-stringified toString');
+
+	t.equal(toPrimitive(valueOfOnlyObject), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, Number), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint Number returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, String), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint String returns non-stringified valueOf');
+
+	t.test('Symbol.toPrimitive', { skip: !hasSymbolToPrimitive }, function (st) {
+		var overriddenObject = { toString: st.fail, valueOf: st.fail };
+		overriddenObject[Symbol.toPrimitive] = function (hint) { return String(hint); };
+
+		st.equal(toPrimitive(overriddenObject), 'default', 'object with Symbol.toPrimitive + no hint invokes that');
+		st.equal(toPrimitive(overriddenObject, Number), 'number', 'object with Symbol.toPrimitive + hint Number invokes that');
+		st.equal(toPrimitive(overriddenObject, String), 'string', 'object with Symbol.toPrimitive + hint String invokes that');
+
+		var nullToPrimitive = { toString: coercibleObject.toString, valueOf: coercibleObject.valueOf };
+		nullToPrimitive[Symbol.toPrimitive] = null;
+		st.equal(toPrimitive(nullToPrimitive), toPrimitive(coercibleObject), 'object with no hint + null Symbol.toPrimitive ignores it');
+		st.equal(toPrimitive(nullToPrimitive, Number), toPrimitive(coercibleObject, Number), 'object with hint Number + null Symbol.toPrimitive ignores it');
+		st.equal(toPrimitive(nullToPrimitive, String), toPrimitive(coercibleObject, String), 'object with hint String + null Symbol.toPrimitive ignores it');
+
+		st.test('exceptions', function (sst) {
+			var nonFunctionToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			nonFunctionToPrimitive[Symbol.toPrimitive] = {};
+			sst['throws'](toPrimitive.bind(null, nonFunctionToPrimitive), TypeError, 'Symbol.toPrimitive returning a non-function throws');
+
+			var uncoercibleToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			uncoercibleToPrimitive[Symbol.toPrimitive] = function (hint) {
+				return { toString: function () { return hint; } };
+			};
+			sst['throws'](toPrimitive.bind(null, uncoercibleToPrimitive), TypeError, 'Symbol.toPrimitive returning an object throws');
+
+			var throwingToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			throwingToPrimitive[Symbol.toPrimitive] = function (hint) { throw new RangeError(hint); };
+			sst['throws'](toPrimitive.bind(null, throwingToPrimitive), RangeError, 'Symbol.toPrimitive throwing throws');
+
+			sst.end();
+		});
+
+		st.end();
+	});
+
+	t.test('exceptions', function (st) {
+		st['throws'](toPrimitive.bind(null, uncoercibleObject), TypeError, 'uncoercibleObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, Number), TypeError, 'uncoercibleObject with hint Number throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, String), TypeError, 'uncoercibleObject with hint String throws a TypeError');
+
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject), TypeError, 'uncoercibleFnObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, Number), TypeError, 'uncoercibleFnObject with hint Number throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, String), TypeError, 'uncoercibleFnObject with hint String throws a TypeError');
+		st.end();
+	});
+	t.end();
+});
diff --git a/src/node_modules/es-to-primitive/test/es5.js b/src/node_modules/es-to-primitive/test/es5.js
new file mode 100644
index 0000000..79444b0
--- /dev/null
+++ b/src/node_modules/es-to-primitive/test/es5.js
@@ -0,0 +1,118 @@
+'use strict';
+
+var test = require('tape');
+var toPrimitive = require('../es5');
+var is = require('object-is');
+var forEach = require('foreach');
+var functionName = require('function.prototype.name');
+var debug = require('object-inspect');
+var hasSymbols = require('has-symbols')();
+
+test('function properties', function (t) {
+	t.equal(toPrimitive.length, 1, 'length is 1');
+	t.equal(functionName(toPrimitive), 'ToPrimitive', 'name is ToPrimitive');
+
+	t.end();
+});
+
+var primitives = [null, undefined, true, false, 0, -0, 42, NaN, Infinity, -Infinity, '', 'abc'];
+
+test('primitives', function (t) {
+	forEach(primitives, function (i) {
+		t.ok(is(toPrimitive(i), i), 'toPrimitive(' + debug(i) + ') returns the same value');
+		t.ok(is(toPrimitive(i, String), i), 'toPrimitive(' + debug(i) + ', String) returns the same value');
+		t.ok(is(toPrimitive(i, Number), i), 'toPrimitive(' + debug(i) + ', Number) returns the same value');
+	});
+	t.end();
+});
+
+test('Symbols', { skip: !hasSymbols }, function (t) {
+	var symbols = [
+		Symbol('foo'),
+		Symbol.iterator,
+		Symbol['for']('foo') // eslint-disable-line no-restricted-properties
+	];
+	forEach(symbols, function (sym) {
+		t.equal(toPrimitive(sym), sym, 'toPrimitive(' + debug(sym) + ') returns the same value');
+		t.equal(toPrimitive(sym, String), sym, 'toPrimitive(' + debug(sym) + ', String) returns the same value');
+		t.equal(toPrimitive(sym, Number), sym, 'toPrimitive(' + debug(sym) + ', Number) returns the same value');
+	});
+
+	var primitiveSym = Symbol('primitiveSym');
+	var stringSym = Symbol.prototype.toString.call(primitiveSym);
+	var objectSym = Object(primitiveSym);
+	t.equal(toPrimitive(objectSym), primitiveSym, 'toPrimitive(' + debug(objectSym) + ') returns ' + debug(primitiveSym));
+
+	// This is different from ES2015, as the ES5 algorithm doesn't account for the existence of Symbols:
+	t.equal(toPrimitive(objectSym, String), stringSym, 'toPrimitive(' + debug(objectSym) + ', String) returns ' + debug(stringSym));
+	t.equal(toPrimitive(objectSym, Number), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', Number) returns ' + debug(primitiveSym));
+	t.end();
+});
+
+test('Arrays', function (t) {
+	var arrays = [[], ['a', 'b'], [1, 2]];
+	forEach(arrays, function (arr) {
+		t.ok(is(toPrimitive(arr), arr.toString()), 'toPrimitive(' + debug(arr) + ') returns toString of the array');
+		t.equal(toPrimitive(arr, String), arr.toString(), 'toPrimitive(' + debug(arr) + ') returns toString of the array');
+		t.ok(is(toPrimitive(arr, Number), arr.toString()), 'toPrimitive(' + debug(arr) + ') returns toString of the array');
+	});
+	t.end();
+});
+
+test('Dates', function (t) {
+	var dates = [new Date(), new Date(0), new Date(NaN)];
+	forEach(dates, function (date) {
+		t.equal(toPrimitive(date), date.toString(), 'toPrimitive(' + debug(date) + ') returns toString of the date');
+		t.equal(toPrimitive(date, String), date.toString(), 'toPrimitive(' + debug(date) + ') returns toString of the date');
+		t.ok(is(toPrimitive(date, Number), date.valueOf()), 'toPrimitive(' + debug(date) + ') returns valueOf of the date');
+	});
+	t.end();
+});
+
+var coercibleObject = { valueOf: function () { return 3; }, toString: function () { return 42; } };
+var valueOfOnlyObject = { valueOf: function () { return 4; }, toString: function () { return {}; } };
+var toStringOnlyObject = { valueOf: function () { return {}; }, toString: function () { return 7; } };
+var coercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return 42; }
+};
+var uncoercibleObject = { valueOf: function () { return {}; }, toString: function () { return {}; } };
+var uncoercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return function toStrFn() {}; }
+};
+
+test('Objects', function (t) {
+	t.equal(toPrimitive(coercibleObject), coercibleObject.valueOf(), 'coercibleObject with no hint coerces to valueOf');
+	t.equal(toPrimitive(coercibleObject, String), coercibleObject.toString(), 'coercibleObject with hint String coerces to toString');
+	t.equal(toPrimitive(coercibleObject, Number), coercibleObject.valueOf(), 'coercibleObject with hint Number coerces to valueOf');
+
+	t.equal(toPrimitive(coercibleFnObject), coercibleFnObject.toString(), 'coercibleFnObject coerces to toString');
+	t.equal(toPrimitive(coercibleFnObject, String), coercibleFnObject.toString(), 'coercibleFnObject with hint String coerces to toString');
+	t.equal(toPrimitive(coercibleFnObject, Number), coercibleFnObject.toString(), 'coercibleFnObject with hint Number coerces to toString');
+
+	t.ok(is(toPrimitive({}), '[object Object]'), '{} with no hint coerces to Object#toString');
+	t.equal(toPrimitive({}, String), '[object Object]', '{} with hint String coerces to Object#toString');
+	t.ok(is(toPrimitive({}, Number), '[object Object]'), '{} with hint Number coerces to Object#toString');
+
+	t.equal(toPrimitive(toStringOnlyObject), toStringOnlyObject.toString(), 'toStringOnlyObject returns toString');
+	t.equal(toPrimitive(toStringOnlyObject, String), toStringOnlyObject.toString(), 'toStringOnlyObject with hint String returns toString');
+	t.equal(toPrimitive(toStringOnlyObject, Number), toStringOnlyObject.toString(), 'toStringOnlyObject with hint Number returns toString');
+
+	t.equal(toPrimitive(valueOfOnlyObject), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, String), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint String returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, Number), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint Number returns valueOf');
+
+	t.test('exceptions', function (st) {
+		st['throws'](toPrimitive.bind(null, uncoercibleObject), TypeError, 'uncoercibleObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, String), TypeError, 'uncoercibleObject with hint String throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, Number), TypeError, 'uncoercibleObject with hint Number throws a TypeError');
+
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject), TypeError, 'uncoercibleFnObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, String), TypeError, 'uncoercibleFnObject with hint String throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, Number), TypeError, 'uncoercibleFnObject with hint Number throws a TypeError');
+		st.end();
+	});
+
+	t.end();
+});
diff --git a/src/node_modules/es-to-primitive/test/es6.js b/src/node_modules/es-to-primitive/test/es6.js
new file mode 100644
index 0000000..16ea0e8
--- /dev/null
+++ b/src/node_modules/es-to-primitive/test/es6.js
@@ -0,0 +1,151 @@
+'use strict';
+
+var test = require('tape');
+var toPrimitive = require('../es6');
+var is = require('object-is');
+var forEach = require('foreach');
+var functionName = require('function.prototype.name');
+var debug = require('object-inspect');
+
+var hasSymbols = require('has-symbols')();
+var hasSymbolToPrimitive = hasSymbols && typeof Symbol.toPrimitive === 'symbol';
+
+test('function properties', function (t) {
+	t.equal(toPrimitive.length, 1, 'length is 1');
+	t.equal(functionName(toPrimitive), 'ToPrimitive', 'name is ToPrimitive');
+
+	t.end();
+});
+
+var primitives = [null, undefined, true, false, 0, -0, 42, NaN, Infinity, -Infinity, '', 'abc'];
+
+test('primitives', function (t) {
+	forEach(primitives, function (i) {
+		t.ok(is(toPrimitive(i), i), 'toPrimitive(' + debug(i) + ') returns the same value');
+		t.ok(is(toPrimitive(i, String), i), 'toPrimitive(' + debug(i) + ', String) returns the same value');
+		t.ok(is(toPrimitive(i, Number), i), 'toPrimitive(' + debug(i) + ', Number) returns the same value');
+	});
+	t.end();
+});
+
+test('Symbols', { skip: !hasSymbols }, function (t) {
+	var symbols = [
+		Symbol('foo'),
+		Symbol.iterator,
+		Symbol['for']('foo') // eslint-disable-line no-restricted-properties
+	];
+	forEach(symbols, function (sym) {
+		t.equal(toPrimitive(sym), sym, 'toPrimitive(' + debug(sym) + ') returns the same value');
+		t.equal(toPrimitive(sym, String), sym, 'toPrimitive(' + debug(sym) + ', String) returns the same value');
+		t.equal(toPrimitive(sym, Number), sym, 'toPrimitive(' + debug(sym) + ', Number) returns the same value');
+	});
+
+	var primitiveSym = Symbol('primitiveSym');
+	var objectSym = Object(primitiveSym);
+	t.equal(toPrimitive(objectSym), primitiveSym, 'toPrimitive(' + debug(objectSym) + ') returns ' + debug(primitiveSym));
+	t.equal(toPrimitive(objectSym, String), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', String) returns ' + debug(primitiveSym));
+	t.equal(toPrimitive(objectSym, Number), primitiveSym, 'toPrimitive(' + debug(objectSym) + ', Number) returns ' + debug(primitiveSym));
+	t.end();
+});
+
+test('Arrays', function (t) {
+	var arrays = [[], ['a', 'b'], [1, 2]];
+	forEach(arrays, function (arr) {
+		t.equal(toPrimitive(arr), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+		t.equal(toPrimitive(arr, String), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+		t.equal(toPrimitive(arr, Number), String(arr), 'toPrimitive(' + debug(arr) + ') returns the string version of the array');
+	});
+	t.end();
+});
+
+test('Dates', function (t) {
+	var dates = [new Date(), new Date(0), new Date(NaN)];
+	forEach(dates, function (date) {
+		t.equal(toPrimitive(date), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date');
+		t.equal(toPrimitive(date, String), String(date), 'toPrimitive(' + debug(date) + ') returns the string version of the date');
+		t.ok(is(toPrimitive(date, Number), Number(date)), 'toPrimitive(' + debug(date) + ') returns the number version of the date');
+	});
+	t.end();
+});
+
+var coercibleObject = { valueOf: function () { return 3; }, toString: function () { return 42; } };
+var valueOfOnlyObject = { valueOf: function () { return 4; }, toString: function () { return {}; } };
+var toStringOnlyObject = { valueOf: function () { return {}; }, toString: function () { return 7; } };
+var coercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return 42; }
+};
+var uncoercibleObject = { valueOf: function () { return {}; }, toString: function () { return {}; } };
+var uncoercibleFnObject = {
+	valueOf: function () { return function valueOfFn() {}; },
+	toString: function () { return function toStrFn() {}; }
+};
+
+test('Objects', function (t) {
+	t.equal(toPrimitive(coercibleObject), coercibleObject.valueOf(), 'coercibleObject with no hint coerces to valueOf');
+	t.equal(toPrimitive(coercibleObject, Number), coercibleObject.valueOf(), 'coercibleObject with hint Number coerces to valueOf');
+	t.equal(toPrimitive(coercibleObject, String), coercibleObject.toString(), 'coercibleObject with hint String coerces to non-stringified toString');
+
+	t.equal(toPrimitive(coercibleFnObject), coercibleFnObject.toString(), 'coercibleFnObject coerces to non-stringified toString');
+	t.equal(toPrimitive(coercibleFnObject, Number), coercibleFnObject.toString(), 'coercibleFnObject with hint Number coerces to non-stringified toString');
+	t.equal(toPrimitive(coercibleFnObject, String), coercibleFnObject.toString(), 'coercibleFnObject with hint String coerces to non-stringified toString');
+
+	t.equal(toPrimitive({}), '[object Object]', '{} with no hint coerces to Object#toString');
+	t.equal(toPrimitive({}, Number), '[object Object]', '{} with hint Number coerces to Object#toString');
+	t.equal(toPrimitive({}, String), '[object Object]', '{} with hint String coerces to Object#toString');
+
+	t.equal(toPrimitive(toStringOnlyObject), toStringOnlyObject.toString(), 'toStringOnlyObject returns non-stringified toString');
+	t.equal(toPrimitive(toStringOnlyObject, Number), toStringOnlyObject.toString(), 'toStringOnlyObject with hint Number returns non-stringified toString');
+	t.equal(toPrimitive(toStringOnlyObject, String), toStringOnlyObject.toString(), 'toStringOnlyObject with hint String returns non-stringified toString');
+
+	t.equal(toPrimitive(valueOfOnlyObject), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, Number), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint Number returns valueOf');
+	t.equal(toPrimitive(valueOfOnlyObject, String), valueOfOnlyObject.valueOf(), 'valueOfOnlyObject with hint String returns non-stringified valueOf');
+
+	t.test('Symbol.toPrimitive', { skip: !hasSymbolToPrimitive }, function (st) {
+		var overriddenObject = { toString: st.fail, valueOf: st.fail };
+		overriddenObject[Symbol.toPrimitive] = function (hint) { return String(hint); };
+
+		st.equal(toPrimitive(overriddenObject), 'default', 'object with Symbol.toPrimitive + no hint invokes that');
+		st.equal(toPrimitive(overriddenObject, Number), 'number', 'object with Symbol.toPrimitive + hint Number invokes that');
+		st.equal(toPrimitive(overriddenObject, String), 'string', 'object with Symbol.toPrimitive + hint String invokes that');
+
+		var nullToPrimitive = { toString: coercibleObject.toString, valueOf: coercibleObject.valueOf };
+		nullToPrimitive[Symbol.toPrimitive] = null;
+		st.equal(toPrimitive(nullToPrimitive), toPrimitive(coercibleObject), 'object with no hint + null Symbol.toPrimitive ignores it');
+		st.equal(toPrimitive(nullToPrimitive, Number), toPrimitive(coercibleObject, Number), 'object with hint Number + null Symbol.toPrimitive ignores it');
+		st.equal(toPrimitive(nullToPrimitive, String), toPrimitive(coercibleObject, String), 'object with hint String + null Symbol.toPrimitive ignores it');
+
+		st.test('exceptions', function (sst) {
+			var nonFunctionToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			nonFunctionToPrimitive[Symbol.toPrimitive] = {};
+			sst['throws'](toPrimitive.bind(null, nonFunctionToPrimitive), TypeError, 'Symbol.toPrimitive returning a non-function throws');
+
+			var uncoercibleToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			uncoercibleToPrimitive[Symbol.toPrimitive] = function (hint) {
+				return { toString: function () { return hint; } };
+			};
+			sst['throws'](toPrimitive.bind(null, uncoercibleToPrimitive), TypeError, 'Symbol.toPrimitive returning an object throws');
+
+			var throwingToPrimitive = { toString: sst.fail, valueOf: sst.fail };
+			throwingToPrimitive[Symbol.toPrimitive] = function (hint) { throw new RangeError(hint); };
+			sst['throws'](toPrimitive.bind(null, throwingToPrimitive), RangeError, 'Symbol.toPrimitive throwing throws');
+
+			sst.end();
+		});
+
+		st.end();
+	});
+
+	t.test('exceptions', function (st) {
+		st['throws'](toPrimitive.bind(null, uncoercibleObject), TypeError, 'uncoercibleObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, Number), TypeError, 'uncoercibleObject with hint Number throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleObject, String), TypeError, 'uncoercibleObject with hint String throws a TypeError');
+
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject), TypeError, 'uncoercibleFnObject throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, Number), TypeError, 'uncoercibleFnObject with hint Number throws a TypeError');
+		st['throws'](toPrimitive.bind(null, uncoercibleFnObject, String), TypeError, 'uncoercibleFnObject with hint String throws a TypeError');
+		st.end();
+	});
+	t.end();
+});
diff --git a/src/node_modules/es-to-primitive/test/index.js b/src/node_modules/es-to-primitive/test/index.js
new file mode 100644
index 0000000..ad71f39
--- /dev/null
+++ b/src/node_modules/es-to-primitive/test/index.js
@@ -0,0 +1,20 @@
+'use strict';
+
+var toPrimitive = require('../');
+var ES5 = require('../es5');
+var ES6 = require('../es6');
+var ES2015 = require('../es2015');
+
+var test = require('tape');
+
+test('default export', function (t) {
+	t.equal(toPrimitive, ES2015, 'default export is ES2015');
+	t.equal(toPrimitive.ES5, ES5, 'ES5 property has ES5 method');
+	t.equal(toPrimitive.ES6, ES6, 'ES6 property has ES6 method');
+	t.equal(toPrimitive.ES2015, ES2015, 'ES2015 property has ES2015 method');
+	t.end();
+});
+
+require('./es5');
+require('./es6');
+require('./es2015');