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comparison: js/src/tests/ecma/String/15.5.4.10-1.js

js/src/tests/ecma/String/15.5.4.10-1.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: 15.5.4.10-1.js
9 ECMA Section: 15.5.4.10 String.prototype.substring( start, end )
10 Description:
11
12 15.5.4.10 String.prototype.substring(start, end)
13
14 Returns a substring of the result of converting this object to a string,
15 starting from character position start and running to character position
16 end of the string. The result is a string value, not a String object.
17
18 If either argument is NaN or negative, it is replaced with zero; if either
19 argument is larger than the length of the string, it is replaced with the
20 length of the string.
21
22 If start is larger than end, they are swapped.
23
24 When the substring method is called with two arguments start and end, the
25 following steps are taken:
26
27 1. Call ToString, giving it the this value as its argument.
28 2. Call ToInteger(start).
29 3. Call ToInteger (end).
30 4. Compute the number of characters in Result(1).
31 5. Compute min(max(Result(2), 0), Result(4)).
32 6. Compute min(max(Result(3), 0), Result(4)).
33 7. Compute min(Result(5), Result(6)).
34 8. Compute max(Result(5), Result(6)).
35 9. Return a string whose length is the difference between Result(8) and
36 Result(7), containing characters from Result(1), namely the characters
37 with indices Result(7) through Result(8)1, in ascending order.
38
39 Note that the substring function is intentionally generic; it does not require
40 that its this value be a String object. Therefore it can be transferred to other
41 kinds of objects for use as a method.
42
43 Author: christine@netscape.com
44 Date: 12 november 1997
45 */
46
47 var SECTION = "15.5.4.10-1";
48 var VERSION = "ECMA_1";
49 startTest();
50 var TITLE = "String.prototype.substring( start, end )";
51
52 writeHeaderToLog( SECTION + " "+ TITLE);
53
54 new TestCase( SECTION, "String.prototype.substring.length", 2, String.prototype.substring.length );
55 new TestCase( SECTION, "delete String.prototype.substring.length", false, delete String.prototype.substring.length );
56 new TestCase( SECTION, "delete String.prototype.substring.length; String.prototype.substring.length", 2, eval("delete String.prototype.substring.length; String.prototype.substring.length") );
57
58 // test cases for when substring is called with no arguments.
59
60 // this is a string object
61
62 new TestCase( SECTION,
63 "var s = new String('this is a string object'); typeof s.substring()",
64 "string",
65 eval("var s = new String('this is a string object'); typeof s.substring()") );
66
67 new TestCase( SECTION,
68 "var s = new String(''); s.substring(1,0)",
69 "",
70 eval("var s = new String(''); s.substring(1,0)") );
71
72 new TestCase( SECTION,
73 "var s = new String('this is a string object'); s.substring(true, false)",
74 "t",
75 eval("var s = new String('this is a string object'); s.substring(false, true)") );
76
77 new TestCase( SECTION,
78 "var s = new String('this is a string object'); s.substring(NaN, Infinity)",
79 "this is a string object",
80 eval("var s = new String('this is a string object'); s.substring(NaN, Infinity)") );
81
82
83 new TestCase( SECTION,
84 "var s = new String('this is a string object'); s.substring(Infinity, NaN)",
85 "this is a string object",
86 eval("var s = new String('this is a string object'); s.substring(Infinity, NaN)") );
87
88
89 new TestCase( SECTION,
90 "var s = new String('this is a string object'); s.substring(Infinity, Infinity)",
91 "",
92 eval("var s = new String('this is a string object'); s.substring(Infinity, Infinity)") );
93
94 new TestCase( SECTION,
95 "var s = new String('this is a string object'); s.substring(-0.01, 0)",
96 "",
97 eval("var s = new String('this is a string object'); s.substring(-0.01,0)") );
98
99
100 new TestCase( SECTION,
101 "var s = new String('this is a string object'); s.substring(s.length, s.length)",
102 "",
103 eval("var s = new String('this is a string object'); s.substring(s.length, s.length)") );
104
105 new TestCase( SECTION,
106 "var s = new String('this is a string object'); s.substring(s.length+1, 0)",
107 "this is a string object",
108 eval("var s = new String('this is a string object'); s.substring(s.length+1, 0)") );
109
110
111 new TestCase( SECTION,
112 "var s = new String('this is a string object'); s.substring(-Infinity, -Infinity)",
113 "",
114 eval("var s = new String('this is a string object'); s.substring(-Infinity, -Infinity)") );
115
116 // this is not a String object, start is not an integer
117
118
119 new TestCase( SECTION,
120 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(Infinity,-Infinity)",
121 "1,2,3,4,5",
122 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(Infinity,-Infinity)") );
123
124 new TestCase( SECTION,
125 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true, false)",
126 "1",
127 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring(true, false)") );
128
129 new TestCase( SECTION,
130 "var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4', '5')",
131 "3",
132 eval("var s = new Array(1,2,3,4,5); s.substring = String.prototype.substring; s.substring('4', '5')") );
133
134
135 // this is an object object
136 new TestCase( SECTION,
137 "var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,0)",
138 "[object ",
139 eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,0)") );
140
141 new TestCase( SECTION,
142 "var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8,obj.toString().length)",
143 "Object]",
144 eval("var obj = new Object(); obj.substring = String.prototype.substring; obj.substring(8, obj.toString().length)") );
145
146 // this is a function object
147 new TestCase( SECTION,
148 "var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8, Infinity)",
149 "Function]",
150 eval("var obj = new Function(); obj.substring = String.prototype.substring; obj.toString = Object.prototype.toString; obj.substring(8,Infinity)") );
151 // this is a number object
152 new TestCase( SECTION,
153 "var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(Infinity, NaN)",
154 "NaN",
155 eval("var obj = new Number(NaN); obj.substring = String.prototype.substring; obj.substring(Infinity, NaN)") );
156
157 // this is the Math object
158 new TestCase( SECTION,
159 "var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI, -10)",
160 "[ob",
161 eval("var obj = Math; obj.substring = String.prototype.substring; obj.substring(Math.PI, -10)") );
162
163 // this is a Boolean object
164
165 new TestCase( SECTION,
166 "var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array(), new Boolean(1))",
167 "f",
168 eval("var obj = new Boolean(); obj.substring = String.prototype.substring; obj.substring(new Array(), new Boolean(1))") );
169
170 // this is a user defined object
171
172 new TestCase( SECTION,
173 "var obj = new MyObject( void 0 ); obj.substring(0, 100)",
174 "undefined",
175 eval( "var obj = new MyObject( void 0 ); obj.substring(0,100)") );
176
177 test();
178
179 function MyObject( value ) {
180 this.value = value;
181 this.substring = String.prototype.substring;
182 this.toString = new Function ( "return this.value+''" );
183 }

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