Codemirror dart port StringStream datatype babysteps.

tools/codemirror/dart/test/codemirror_tests.dart

+// This source code is licensed under the terms described in the LICENSE file.
+
+#library('codemirror_tests');
+
+#import('../../../../../dart/client/testing/unittest/unittest.dart');
+#import('../lib/codemirror.dart');
+
+void main(){
+
+ test('StringStream_basic', () {
+   String text = 'text';
+   StringStream str = stream(text);
+   expect(str.sol()).isTrue();
+   expect(str.eol()).isFalse();
+   for (int i=0; i < text.length; ++i){
+     expect(str.peek()).equals(text[i]);
+     expect(str.next()).equals(text[i]); //advances
+   }
+   expect(str.sol()).isFalse();
+   expect(str.eol()).isTrue();
+ });
+
+ test('StringStream_eat', () {
+   StringStream str = stream('abcd');
+   expect(str.eat('a')).equals('a');
+   expect(str.peek()).equals('b');
+ });
+
+ test('StringStream_eatWhile', () {
+   StringStream str = stream('aabc');
+   expect(str.eatWhile('a')).isTrue();
+   expect(str.peek()).equals('b');
+ });
+
+ test('StringStream_eatSpace', () {
+   StringStream str = stream('   abcdef');
+   expect(str.eatSpace()).isTrue();
+   expect(str.peek()).equals('a');
+ });
+
+ test('StringStream_skipTo', () {
+   StringStream str = stream('abc def');
+   expect(str.skipTo('d')).isTrue();
+   expect(str.peek()).equals('d');
+ });
+
+ test('StringStream_match', () {
+   expect(stream('abcdef').match('abc')).isTrue();
+   expect(stream('abcdef').match('ABC', caseInsensitive: true)).isTrue();
+   expect(stream('abcdef').match('xxx')).isFalse();
+   StringStream str = stream('abcdef');
+   expect(str.match('abc', consume: true)).isTrue();
+   expect(str.peek()).equals('d');
+   str = stream('abcdef');
+   expect(str.match('abc', consume: false)).isTrue();
+   expect(str.peek()).equals('a');
+ });
+
+ test('countColumn', () {
+   expect(countColumn('0123456789')).equals(10);
+   expect(countColumn('a\tb')).equals(9); //default tabCount = 8
+ });
+
+}
+
+StringStream stream(String str) {
+  return new StringStream(str);
+}