mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
140 lines
3.6 KiB
JavaScript
140 lines
3.6 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.substr, 'length').configurable === false);
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assert(Object.getOwnPropertyDescriptor(String.prototype.substr, 'length').enumerable === false);
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assert(Object.getOwnPropertyDescriptor(String.prototype.substr, 'length').writable === false);
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assert(String.prototype.substr.length === 2);
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assert(String.prototype.substr.call(new String()) === "");
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assert(String.prototype.substr.call({}) === "[object Object]");
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// check this is undefined
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try {
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String.prototype.substr.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.substr.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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// simple checks
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assert("Hello world!".substr(0, 11) === "Hello world");
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assert("Hello world!".substr(11, 0) === "");
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assert("Hello world!".substr(0, 12) === "Hello world!");
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assert("Hello world!".substr(12, 0) === "");
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// check NaN
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assert("Hello world!".substr(NaN, 12) === "Hello world!");
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// check NaN
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assert("Hello world!".substr(2, NaN) === "");
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// check end undefined
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assert("Hello world!".substr(2, undefined) === "llo world!");
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// check negative
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assert("Hello world!".substr(-1,8) === "!");
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// check negative
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assert("Hello\tworld!".substr(5,-8) === "");
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// check negative
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assert("Hello world!".substr(-1,-8) === "");
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// check ranges
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assert("Hello world!".substr(-1,10000) === "!");
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assert("Hello world!".substr(10000,1000000) === "");
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assert("Hello world!".substr(100000,1) === "");
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// check both undefined
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assert("Hello world!".substr(undefined, undefined) === "Hello world!");
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var undef_var;
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assert("Hello world!".substr(undef_var, undef_var) === "Hello world!");
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// check integer conversion
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assert("Hello world!".substr(undefined, 5) === "Hello");
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assert("Hello world!".substr(undefined, "bar") === "");
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assert("Hello world!".substr(2, true) === "l");
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assert("Hello world!".substr(2, false) === "");
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assert("Hello world!".substr(5, obj) === " world!");
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// check other objects
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var obj = { substr : String.prototype.substr }
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obj.toString = function() {
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return "Iam";
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}
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assert(obj.substr(0,1) === "I");
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obj.toString = function() {
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throw new ReferenceError ("foo");
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};
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try {
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assert(obj.substr(100000,1));
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assert(false);
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} catch (e) {
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assert(e.message === "foo");
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assert(e instanceof ReferenceError);
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}
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// check coercible - undefined
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try {
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assert(true.substr() === "");
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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.substr.call(null, 0, 1) === "");
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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.substr.call(true, 0, 1) === "t");
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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.substr.call(test_object, 0, 7) === "[object");
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// check coercible - Number
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assert(String.prototype.substr.call(123, 0, 3) === "123");
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