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//
// System.IO.StringWriter
//
// Author: Marcin Szczepanski (marcins@zipworld.com.au)
//
// TODO: Add some testing for exceptions
//
// TODO: Some of the tests could be a bit more thorough
//
using NUnit.Framework;
using System.IO;
using System;
namespace MonoTests.System.IO {
[TestFixture]
public class StringReaderTest {
[Test]
public void TestReadLine() {
string testme = "a\nb\nc\n";
StringReader sr = new StringReader (testme);
string inputLine;
int lines = 0;
while ((inputLine = sr.ReadLine ()) != null)
lines++;
Assert.AreEqual (3, lines, "Incorrect number of lines");
}
[Test]
public void TestPeekRead() {
StringReader reader = new StringReader( "Test String" );
char c = (char)reader.Peek();
Assert.AreEqual ('T', c, "A1");
char read = (char)reader.Read();
Assert.AreEqual ('T', read, "A2");
c = (char)reader.Peek();
Assert.AreEqual ('e', c, "A3");
}
[Test]
public void TestPeekAndReadAtEndOfString() {
StringReader reader = new StringReader("x");
char c = (char)reader.Peek();
Assert.AreEqual ('x', c, "A1");
c = (char)reader.Read();
Assert.AreEqual ('x', c, "A2");
int i = reader.Peek();
Assert.AreEqual (-1, i, "A3");
i = reader.Read();
Assert.AreEqual (-1, i, "A4");
i = reader.Peek();
Assert.AreEqual (-1, i, "A5");
}
[Test]
public void TestPeekAndReadEmptyString() {
StringReader reader = new StringReader("");
int i = reader.Peek();
Assert.AreEqual (-1, i, "A1");
i = reader.Read();
Assert.AreEqual (-1, i, "A2");
}
[Test]
public void TestRead() {
StringReader reader = new StringReader( "Test String" );
/* Read from start of string */
char[] test = new char[5];
int charsRead = reader.Read( test, 0, 5 );
Assert.AreEqual (5, charsRead);
Assert.AreEqual ("Test ", new String(test));
/* Read to end of string */
//reader = new StringReader( "Test String" );
test = new char[6];
charsRead = reader.Read( test, 0, 6 );
Assert.AreEqual (6, charsRead);
Assert.AreEqual ("String", new String( test ));
/* Read past end of string */
test = new char[6];
reader = new StringReader( "Foo" );
charsRead = reader.Read( test, 0, 6 );
Assert.AreEqual (3, charsRead);
Assert.AreEqual ("Foo\0\0\0", new String( test ));
/* Check that a new invocation on the empty reader will return 0 */
charsRead = reader.Read (test, 0, 6);
Assert.AreEqual (0, charsRead);
}
[Test]
public void TestReadEOL() {
StringReader reader = new StringReader( "Line1\rLine2\r\nLine3\nLine4" );
string test = reader.ReadLine();
Assert.AreEqual ("Line1", test);
test = reader.ReadLine();
Assert.AreEqual ("Line2", test);
test = reader.ReadLine();
Assert.AreEqual ("Line3", test);
test = reader.ReadLine();
Assert.AreEqual ("Line4", test);
}
[Test]
public void TestClose() {
StringReader reader = new StringReader("reader");
reader.Close ();
try {
reader.Read ();
Assert.Fail ();
} catch (Exception e) {
Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "Close 1");
}
try {
reader.Peek ();
Assert.Fail ();
} catch (Exception e) {
Assert.AreEqual (typeof (ObjectDisposedException), e.GetType (), "Close 2");
}
}
[Test]
public void TestExceptions() {
StringReader reader;
try {
reader = new StringReader(null);
Assert.Fail ();
} catch (Exception e) {
Assert.AreEqual (typeof (ArgumentNullException), e.GetType (), "Exception 1");
}
reader = new StringReader ("this is a test\nAnd nothing else");
try {
reader.Read (null, 0, 12);
Assert.Fail ();
} catch (Exception e) {
Assert.AreEqual (typeof (ArgumentNullException), e.GetType (), "Exception 2");
}
}
[Test]
public void MoreEOL ()
{
TextReader tr = new StringReader ("There she was just a walking\n" +
"Down the street singin'\r" +
"Do wah diddy diddy dum diddy do");
int i = 0;
while (tr.ReadLine () != null)
i++;
Assert.AreEqual (3, i, "#01");
}
[Test]
[ExpectedException (typeof (ArgumentException))]
public void Read_IndexOverflow ()
{
StringReader sr = new StringReader ("Mono");
sr.Read (new char [4], Int32.MaxValue, 1);
}
[Test]
[ExpectedException (typeof (ArgumentException))]
public void Read_CountOverflow ()
{
StringReader sr = new StringReader ("Mono");
sr.Read (new char [4], 1, Int32.MaxValue);
}
[Test]
public void Read_DoesntStopAtLineEndings ()
{
StringReader reader = new StringReader ("Line1\rLine2\r\nLine3\nLine4");
Assert.AreEqual (reader.Read (new char[24], 0, 24), 24);
}
[Test]
public void MixedLineEnding ()
{
string foobar = "Foo\n\r\n\rBar";
StringReader reader = new StringReader (foobar);
int count = 0;
while (reader.ReadLine () != null)
count++;
Assert.AreEqual (4, count);
}
}
}
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