mirror of
https://github.com/jerryscript-project/jerryscript.git
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113 lines
2.9 KiB
JavaScript
113 lines
2.9 KiB
JavaScript
// Copyright 2015 Samsung Electronics Co., Ltd.
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// Copyright 2015 University of Szeged.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// check properties
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assert(Object.getOwnPropertyDescriptor(String.prototype.charAt, 'length').configurable === false);
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assert(Object.getOwnPropertyDescriptor(String.prototype.charAt, 'length').enumerable === false);
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assert(Object.getOwnPropertyDescriptor(String.prototype.charAt, 'length').writable === false);
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assert(String.prototype.charAt.length === 1);
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// check empty string
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assert(String.prototype.charAt.call(new String()) === "");
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// check NaN
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assert("hello world!".charAt(NaN) === "h");
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// check Object
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assert(String.prototype.charAt.call({}) === "[");
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// simple checks
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assert("hello world!".charAt(0) === "h");
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assert("hello world!".charAt(1) === "e");
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// check +-Inf
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assert("hello world!".charAt(-Infinity) === "");
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assert("hello world!".charAt(Infinity) === "");
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assert("hello world!".charAt(11) === "!");
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assert("hello world!".charAt(12) === "");
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// check unicode
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assert("hello\u000B\u000C\u0020\u00A0world!".charAt(8) === "\u00A0");
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assert("hello\uD834\uDF06world!".charAt(6) === "\uDF06");
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assert("hell\u006F\u006F w\u006F\u006Frld!".charAt(8) === "\u006F");
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assert("\u00A9\u006F".charAt(2) === "");
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// check negative
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assert("hello world!".charAt(-1) === "");
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assert("hello world!".charAt(-9999999) === "");
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assert("hello world!".charAt(-0) === "h");
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// check undefined
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assert("hello world!".charAt(undefined) === "h");
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// check booleans
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assert("hello world!".charAt(true) === "e");
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assert("hello world!".charAt(false) === "h");
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// check this is undefined
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try {
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String.prototype.charAt.call(undefined);
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assert(false);
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} catch(e) {
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assert(e instanceof TypeError);
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}
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// check this is null
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try {
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String.prototype.charAt.call(null);
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assert(false);
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} catch(e) {
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assert(e instanceof TypeError);
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}
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// check coercible - undefined
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try {
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assert(true.charAt() === "");
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assert(false);
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} catch (e) {
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assert(e instanceof TypeError);
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}
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// check coercible - null
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try {
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assert(String.prototype.charAt.call(null, 0) === "");
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assert(false);
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} catch (e) {
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assert(e instanceof TypeError);
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}
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// check coercible - Boolean
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assert(String.prototype.charAt.call(true, 1) === "r");
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// check coercible - Object
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var test_object = {firstName:"John", lastName:"Doe"};
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assert(String.prototype.charAt.call(test_object, 1) === "o");
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// check coercible - Number
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assert(String.prototype.charAt.call(123, 2) === "3");
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