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comparison: js/src/tests/ecma/String/15.5.4.9-1.js

js/src/tests/ecma/String/15.5.4.9-1.js

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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6
7 /**
8 File Name: 15.5.4.9-1.js
9 ECMA Section: 15.5.4.9 String.prototype.substring( start )
10 Description:
11
12 15.5.4.9 String.prototype.substring(start)
13
14 Returns a substring of the result of converting this object to a string,
15 starting from character position start and running to the end of the
16 string. The result is a string value, not a String object.
17
18 If the argument is NaN or negative, it is replaced with zero; if the
19 argument is larger than the length of the string, it is replaced with the
20 length of the string.
21
22 When the substring method is called with one argument start, the following
23 steps are taken:
24
25 1.Call ToString, giving it the this value as its argument.
26 2.Call ToInteger(start).
27 3.Compute the number of characters in Result(1).
28 4.Compute min(max(Result(2), 0), Result(3)).
29 5.Return a string whose length is the difference between Result(3) and Result(4),
30 containing characters from Result(1), namely the characters with indices Result(4)
31 through Result(3)1, in ascending order.
32
33 Author: christine@netscape.com
34 Date: 12 november 1997
35 */
36
37 var SECTION = "15.5.4.9-1";
38 var VERSION = "ECMA_1";
39 startTest();
40 var TITLE = "String.prototype.substring( start )";
41
42 writeHeaderToLog( SECTION + " "+ TITLE);
43
44 new TestCase( SECTION, "String.prototype.substring.length", 2, String.prototype.substring.length );
45 new TestCase( SECTION, "delete String.prototype.substring.length", false, delete String.prototype.substring.length );
46 new TestCase( SECTION, "delete String.prototype.substring.length; String.prototype.substring.length", 2, eval("delete String.prototype.substring.length; String.prototype.substring.length") );
47
48 // test cases for when substring is called with no arguments.
49
50 // this is a string object
51
52 new TestCase( SECTION,
53 "var s = new String('this is a string object'); typeof s.substring()",
54 "string",
55 eval("var s = new String('this is a string object'); typeof s.substring()") );
56
57 new TestCase( SECTION,
58 "var s = new String(''); s.substring()",
59 "",
60 eval("var s = new String(''); s.substring()") );
61
62
63 new TestCase( SECTION,
64 "var s = new String('this is a string object'); s.substring()",
65 "this is a string object",
66 eval("var s = new String('this is a string object'); s.substring()") );
67
68 new TestCase( SECTION,
69 "var s = new String('this is a string object'); s.substring(NaN)",
70 "this is a string object",
71 eval("var s = new String('this is a string object'); s.substring(NaN)") );
72
73
74 new TestCase( SECTION,
75 "var s = new String('this is a string object'); s.substring(-0.01)",
76 "this is a string object",
77 eval("var s = new String('this is a string object'); s.substring(-0.01)") );
78
79
80 new TestCase( SECTION,
81 "var s = new String('this is a string object'); s.substring(s.length)",
82 "",
83 eval("var s = new String('this is a string object'); s.substring(s.length)") );
84
85 new TestCase( SECTION,
86 "var s = new String('this is a string object'); s.substring(s.length+1)",
87 "",
88 eval("var s = new String('this is a string object'); s.substring(s.length+1)") );
89
90
91 new TestCase( SECTION,
92 "var s = new String('this is a string object'); s.substring(Infinity)",
93 "",
94 eval("var s = new String('this is a string object'); s.substring(Infinity)") );
95
96 new TestCase( SECTION,
97 "var s = new String('this is a string object'); s.substring(-Infinity)",
98 "this is a string object",
99 eval("var s = new String('this is a string object'); s.substring(-Infinity)") );
100
101 // this is not a String object, start is not an integer
102
103
104 new TestCase( SECTION,
105 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()",
106 "1,2,3,4,5",
107 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring()") );
108
109 new TestCase( SECTION,
110 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)",
111 ",2,3,4,5",
112 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true)") );
113
114 new TestCase( SECTION,
115 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')",
116 "3,4,5",
117 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4')") );
118
119 new TestCase( SECTION,
120 "var s = new Array(); s.substring = String.prototype.substring; s.substring('4')",
121 "",
122 eval("var s = new Array(); s.substring = String.prototype.substring; s.substring('4')") );
123
124 // this is an object object
125 new TestCase( SECTION,
126 "var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)",
127 "Object]",
128 eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8)") );
129
130 // this is a function object
131 new TestCase( SECTION,
132 "var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)",
133 "Function]",
134 eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8)") );
135 // this is a number object
136 new TestCase( SECTION,
137 "var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)",
138 "NaN",
139 eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(false)") );
140
141 // this is the Math object
142 new TestCase( SECTION,
143 "var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)",
144 "ject Math]",
145 eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI)") );
146
147 // this is a Boolean object
148
149 new TestCase( SECTION,
150 "var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())",
151 "false",
152 eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array())") );
153
154 // this is a user defined object
155
156 new TestCase( SECTION,
157 "var obj = new MyObject( null ); obj.substring(0)",
158 "null",
159 eval( "var obj = new MyObject( null ); obj.substring(0)") );
160
161
162 test();
163
164 function MyObject( value ) {
165 this.value = value;
166 this.substring = String.prototype.substring;
167 this.toString = new Function ( "return this.value+''" );
168 }

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