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14 * The Original Code is JavaScript Engine testing utilities.
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20 * Contributors: d-russo@ti.com, pschwartau@netscape.com, joerg.schaible@gmx.de
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38 * SUMMARY: Testing Error.prototype.toString()
40 * Revised: 25 Nov 2002
41 * See http://bugzilla.mozilla.org/show_bug.cgi?id=181909
43 * Note that ECMA-262 3rd Edition Final, Section 15.11.4.4 states that
44 * Error.prototype.toString() returns an implementation-dependent string.
45 * Therefore any testcase on this property is somewhat arbitrary.
47 * However, d-russo@ti.com pointed out that Rhino was returning this:
49 * js> err = new Error()
50 * undefined: undefined
52 * js> err = new Error("msg")
56 * We expect Rhino to return what SpiderMonkey currently does:
58 * js> err = new Error()
61 * js> err = new Error("msg")
65 * i.e. we expect err.toString() === err.name if err.message is not defined;
66 * otherwise, we expect err.toString() === err.name + ': ' + err.message.
68 * See also ECMA 15.11.4.2, 15.11.4.3
70 //-----------------------------------------------------------------------------
73 var summary = 'Testing Error.prototype.toString()';
77 var actualvalues = [];
79 var expectedvalues = [];
80 var EMPTY_STRING = '';
81 var EXPECTED_FORMAT = 0;
84 status = inSection(1);
85 var err1 = new Error('msg1');
86 actual = examineThis(err1, 'msg1');
87 expect = EXPECTED_FORMAT;
90 status = inSection(2);
91 var err2 = new Error(err1);
92 actual = examineThis(err2, err1);
93 expect = EXPECTED_FORMAT;
96 status = inSection(3);
97 var err3 = new Error();
98 actual = examineThis(err3, EMPTY_STRING);
99 expect = EXPECTED_FORMAT;
102 status = inSection(4);
103 var err4 = new Error(EMPTY_STRING);
104 actual = examineThis(err4, EMPTY_STRING);
105 expect = EXPECTED_FORMAT;
108 // now generate a run-time error -
109 status = inSection(5);
116 actual = examineThis(err5, '.*');
118 expect = EXPECTED_FORMAT;
123 //-----------------------------------------------------------------------------
125 //-----------------------------------------------------------------------------
130 * Searches err.toString() for err.name + ':' + err.message,
131 * with possible whitespace on each side of the colon sign.
133 * We allow for no colon in case err.message was not provided by the user.
134 * In such a case, SpiderMonkey and Rhino currently set err.message = '',
135 * as allowed for by ECMA 15.11.4.3. This makes |pattern| work in this case.
137 * If this is ever changed to a non-empty string, e.g. 'undefined',
138 * you may have to modify |pattern| to take that into account -
141 function examineThis(err, msg)
143 var pattern = err.name + '\\s*:?\\s*' + msg;
144 return err.toString().search(RegExp(pattern));
150 statusitems[UBound] = status;
151 actualvalues[UBound] = actual;
152 expectedvalues[UBound] = expect;
160 printBugNumber (bug);
161 printStatus (summary);
163 for (var i = 0; i < UBound; i++)
165 reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);