[Tests] add cases for Infinities; increase coverage

test/implementation.js

@@ -0,0 +1,20 @@
+'use strict';
+
+var implementation = require('../implementation');
+var callBind = require('es-abstract/helpers/callBind');
+var test = require('tape');
+var hasStrictMode = require('has-strict-mode')();
+var runTests = require('./tests');
+
+test('as a function', function (t) {
+	t.test('bad first arg/receiver', { skip: !hasStrictMode }, function (st) {
+		/* eslint no-useless-call: 0 */
+		st['throws'](function () { implementation.call(undefined); }, TypeError, 'undefined is not an object');
+		st['throws'](function () { implementation.call(null); }, TypeError, 'null is not an object');
+		st.end();
+	});
+
+	runTests(callBind(implementation), t);
+
+	t.end();
+});

test/tests.js

@@ -16,6 +16,9 @@ module.exports = function (at, t) {
 		st.equal(at(arr, 3), undefined);
 		st.equal(at(arr, -4), undefined);
 
+		st.equal(at(arr, Infinity), undefined);
+		st.equal(at(arr, -Infinity), undefined);
+
 		st.equal(at([], 0), undefined);
 		st.equal(at([], -1), undefined);