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Side by Side Diff: pkg/unittest/description.dart

Issue 11301046: Restructure pkg/unittest and pkg/webdriver to follow the pub conventions. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 8 years, 1 month ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4 /**
5 * The default implementation of IDescription. This should rarely need
6 * substitution, although conceivably it is a place where other languages
7 * could be supported.
8 */
9
10 part of unittest;
11
12 class StringDescription implements Description {
13 var _out;
14
15 /** Initialize the description with initial contents [init]. */
16 StringDescription([String init = '']) {
17 _out = init;
18 }
19
20 /** Get the description as a string. */
21 String toString() => _out;
22
23 /** Append some plain [text] to the description. */
24 Description add(String text) {
25 _out = '${_out}${text}';
26 return this;
27 }
28
29 /** Change the value of the description. */
30 Description replace(String text) {
31 _out = text;
32 return this;
33 }
34
35 /**
36 * Appends a description of [value]. If it is an IMatcher use its
37 * describe method; if it is a string use its literal value after
38 * escaping any embedded control characters; otherwise use its
39 * toString() value and wrap it in angular "quotes".
40 */
41 Description addDescriptionOf(value) {
42 if (value is Matcher) {
43 value.describe(this);
44 } else if (value is String) {
45 _addEscapedString(value);
46 } else {
47 String description = (value == null) ? "null" : value.toString();
48 if (description.startsWith('<') && description.endsWith('>')) {
49 add(description);
50 } else {
51 add('<');
52 add(description);
53 add('>');
54 }
55 }
56 return this;
57 }
58
59 /**
60 * Append an [Iterable] [list] of objects to the description, using the
61 * specified [separator] and framing the list with [start]
62 * and [end].
63 */
64 Description addAll(String start, String separator, String end,
65 Iterable list) {
66 var separate = false;
67 add(start);
68 for (var item in list) {
69 if (separate) {
70 add(separator);
71 }
72 addDescriptionOf(item);
73 separate = true;
74 }
75 add(end);
76 return this;
77 }
78
79 /** Escape the control characters in [string] so that they are visible. */
80 _addEscapedString(String string) {
81 add("'");
82 for (var i = 0; i < string.length; i++) {
83 add(_escape(string[i]));
84 }
85 add("'");
86 }
87
88 /** Return the escaped form of a character [ch]. */
89 _escape(ch) {
90 if (ch == "'")
91 return "\'";
92 else if (ch == '\n')
93 return '\\n';
94 else if (ch == '\r')
95 return '\\r';
96 else if (ch == '\t')
97 return '\\t';
98 else
99 return ch;
100 }
101 }
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