mcs/class/corlib/Test/System.IO/TextReaderTest.cs

   1 //
   2 // TextWriterTest.cs
   3 //
   4 // Author:
   5 //      William Holmes <billholmes54@gmail.com>
   6 //
   7 //
   8
   9 using System;
  10 using System.IO;
  11 using System.Text;
  12 using NUnit.Framework;
  13
  14 namespace MonoTests.System.IO
  15 {
  16         [TestFixture]
  17         public class TextReaderTest
  18         {
  19                 [Test]
  20                 public void TestNullReader ()
  21                 {
  22                         Assert.IsNotNull (TextReader.Null);
  23
  24                         string name = TextReader.Null.GetType ().FullName;
  25                         Assert.AreEqual ("System.IO.TextReader+NullTextReader", name);
  26
  27                         string linetest = TextReader.Null.ReadLine ();
  28                         Assert.IsNull (linetest, "We expect null");
  29
  30                         string readtoendtest = TextReader.Null.ReadToEnd ();
  31                         Assert.AreEqual (string.Empty, readtoendtest, "Expect an empty string." );
  32
  33                         int count = TextReader.Null.Read ();
  34                         Assert.AreEqual (-1, count);
  35                 }
  36
  37                 [Test]
  38                 public void TestTextReaderReadLine() {
  39                         using(var reader = new TestTextReader("abc\n\ndef\r\nghi")) {
  40                                 var line = reader.ReadLine();
  41                                 Assert.AreEqual("abc", line, "first line (\\n)");
  42
  43                                 line = reader.ReadLine();
  44                                 Assert.AreEqual("", line, "second line (empty)");
  45
  46                                 line = reader.ReadLine();
  47                                 Assert.AreEqual("def", line, "third line (\\r\\n)");
  48
  49                                 line = reader.ReadLine();
  50                                 Assert.AreEqual("ghi", line, "fourth line (last)");
  51
  52                                 line = reader.ReadLine();
  53                                 Assert.AreEqual(null, line, "eof");
  54                         }
  55                 }
  56
  57                 [Test]
  58                 public void TestTextReaderReadToEnd() {
  59                         using(var reader = new TestTextReader("abc\n\ndef\r\nghi")) {
  60                                 var contents = reader.ReadToEnd();
  61                                 Assert.AreEqual("abc\n\ndef\r\nghi", contents);
  62                         }
  63                 }
  64
  65                 private class TestTextReader : TextReader {
  66                         TextReader reader;
  67
  68                         public TestTextReader(string text)
  69                         {
  70                                 this.reader = new StringReader(text);
  71                         }
  72
  73                         public override int Peek()
  74                         {
  75                                 return reader.Peek();
  76                         }
  77
  78                         public override int Read()
  79                         {
  80                                 return reader.Read();
  81                         }
  82                 }
  83         }
  84 }