--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+fun test(s: String)
+do
+ print s.length
+ print s.first
+ print s.last
+ print s[2]
+ print s.substring(1, 2)
+ print s.substring(-1, 2)
+ print s.substring(1, 0)
+ print s.substring(2, 5)
+
+ print s.substring_from(1)
+ print s.substring_from(-1)
+ print s.substring_from(2)
+
+ print s.has_substring("bc",1)
+ print not s.has_substring("bc",2)
+
+ print s.has_prefix("ab")
+ print not s.has_prefix("bc")
+
+ print s.has_suffix("de")
+ print not s.has_suffix("cd")
+
+ print s.to_upper
+ print s.to_lower
+
+ print s == "abcde"
+ print s < "abcdf"
+ print s > "abcdd"
+ print "z" + s + "z" == "zabcdez"
+end
+
+test("abcde")
+test("ab"+"cde")
+test("xabcdex".substring(1,5))