Move unittest from lib to pkg.

lib/unittest/string_matchers.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/**
- * Returns a matcher which matches if the match argument is a string and
- * is equal to [value] when compared case-insensitively.
- */
-Matcher equalsIgnoringCase(String value) => new _IsEqualIgnoringCase(value);
-
-class _IsEqualIgnoringCase extends _StringMatcher {
-  final String _value;
-  String _matchValue;
-
-  _IsEqualIgnoringCase(this._value) {
-    _matchValue = _value.toLowerCase();
-  }
-
-  bool matches(item, MatchState mismatchState) =>
-      item is String && _matchValue == item.toLowerCase();
-
-  Description describe(Description description) =>
-      description.addDescriptionOf(_value).add(' ignoring case');
-}
-
-/**
- * Returns a matcher which matches if the match argument is a string and
- * is equal to [value] when compared with all runs of whitespace
- * collapsed to single spaces and leading and trailing whitespace removed.
- *
- * For example, `equalsIgnoringCase("hello world")` will match
- * "hello   world", "  hello world" and "hello world  ".
- */
-Matcher equalsIgnoringWhitespace(_string) =>
-    new _IsEqualIgnoringWhitespace(_string);
-
-class _IsEqualIgnoringWhitespace extends _StringMatcher {
-  final String _value;
-  String _matchValue;
-
-  _IsEqualIgnoringWhitespace(this._value) {
-    _matchValue = collapseWhitespace(_value);
-  }
-
-  bool matches(item, MatchState matchState) =>
-      item is String && _matchValue == collapseWhitespace(item);
-
-  Description describe(Description description) =>
-    description.addDescriptionOf(_matchValue).add(' ignoring whitespace');
-
-  Description describeMismatch(item, Description mismatchDescription,
-                               MatchState matchState, bool verbose) {
-    if (item is String) {
-      return mismatchDescription.add('was ').
-          addDescriptionOf(collapseWhitespace(item));
-    } else {
-      return super.describeMismatch(item, mismatchDescription,
-          matchState, verbose);
-    }
-  }
-}
-
-/**
- * Utility function to collapse whitespace runs to single spaces
- * and strip leading/trailing whitespace.
- */
-String collapseWhitespace(_string) {
-  bool isWhitespace(String ch) => (' \n\r\t'.indexOf(ch) >= 0);
-  StringBuffer result = new StringBuffer();
-  bool skipSpace = true;
-  for (var i = 0; i < _string.length; i++) {
-    var character = _string[i];
-    if (isWhitespace(character)) {
-      if (!skipSpace) {
-        result.add(' ');
-        skipSpace = true;
-      }
-    } else {
-      result.add(character);
-      skipSpace = false;
-    }
-  }
-  return result.toString().trim();
-}
-
-/**
- * Returns a matcher that matches if the match argument is a string and
- * starts with [prefixString].
- */
-Matcher startsWith(String prefixString) => new _StringStartsWith(prefixString);
-
-class _StringStartsWith extends _StringMatcher {
-  final String _prefix;
-
-  const _StringStartsWith(this._prefix);
-
-  bool matches(item, MatchState matchState) =>
-      item is String && item.startsWith(_prefix);
-
-  Description describe(Description description) =>
-      description.add('a string starting with ').addDescriptionOf(_prefix);
-}
-
-/**
- * Returns a matcher that matches if the match argument is a string and
- * ends with [suffixString].
- */
-Matcher endsWith(String suffixString) => new _StringEndsWith(suffixString);
-
-class _StringEndsWith extends _StringMatcher {
-
-  final String _suffix;
-
-  const _StringEndsWith(this._suffix);
-
-  bool matches(item, MatchState matchState) =>
-      item is String && item.endsWith(_suffix);
-
-  Description describe(Description description) =>
-      description.add('a string ending with ').addDescriptionOf(_suffix);
-}
-
-/**
- * Returns a matcher that matches if the match argument is a string and
- * contains a given list of [substrings] in relative order.
- *
- * For example, `stringContainsInOrder(["a", "e", "i", "o", "u"])` will match
- * "abcdefghijklmnopqrstuvwxyz".
- */
-Matcher stringContainsInOrder(substrings) =>
-    new _StringContainsInOrder(substrings);
-
-class _StringContainsInOrder extends _StringMatcher {
-
-  final List<String> _substrings;
-
-  const _StringContainsInOrder(this._substrings);
-
-  bool matches(item, MatchState matchState) {
-    if (!(item is String)) {
-      return false;
-    }
-    var from_index = 0;
-    for (var s in _substrings) {
-      from_index = item.indexOf(s, from_index);
-      if (from_index < 0)
-        return false;
-    }
-    return true;
-  }
-
-  Description describe(Description description) =>
-      description.addAll('a string containing ', ', ', ' in order',
-                                                  _substrings);
-}
-
-/**
- * Returns a matcher that matches if the match argument is a string and
- * matches the regular expression given by [re]. [re] can be a RegExp
- * instance or a string; in the latter case it will be used to create
- * a RegExp instance.
- */
-Matcher matches(re) => new _MatchesRegExp(re);
-
-class _MatchesRegExp extends _StringMatcher {
-  RegExp _regexp;
-
-  _MatchesRegExp(re) {
-    if (re is String) {
-      _regexp = new RegExp(re);
-    } else if (re is RegExp) {
-      _regexp = re;
-    } else {
-      throw new IllegalArgumentException('matches requires a regexp or string');
-    }
-  }
-
-  bool matches(String item, MatchState matchState) =>
-        _regexp.hasMatch(item);
-
-  Description describe(Description description) =>
-      description.add("match '${_regexp.pattern}'");
-}
-
-// String matchers match against a string. We add this intermediate
-// class to give better mismatch error messages than the base Matcher class.
-/* abstract */ class _StringMatcher extends BaseMatcher {
-  const _StringMatcher();
-  Description describeMismatch(item, Description mismatchDescription,
-                               MatchState matchState, bool verbose) {
-    if (!(item is String)) {
-      return mismatchDescription.
-          addDescriptionOf(item).
-          add(' not a string');
-    } else {
-      return super.describeMismatch(item, mismatchDescription,
-          matchState, verbose);
-    }
-  }
-}