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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;
using clojure.lang;
using System.IO;
namespace Clojure.Tests.ReaderTests
{
[TestFixture]
public class LineNumberingTextReaderTests : AssertionHelper
{
const string _sample = "abc\nde\nfghijk\r\nlmnopq\n\nrstuv";
StringReader _sr;
LineNumberingTextReader _rdr;
[SetUp]
public void Setup()
{
_sr = new StringReader(_sample);
_rdr = new LineNumberingTextReader(_sr);
}
[TearDown]
public void TearDown()
{
_rdr.Close();
}
[Test]
public void Initializes_properly()
{
Expect(_rdr.Position, EqualTo(0));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.Peek(), EqualTo((int)_sample[0]));
Expect(_rdr.AtLineStart);
}
[Test]
public void Reads_character_at_a_time()
{
int[] chars = new int[] {
'a', 'b', 'c', '\n',
'd', 'e', '\n',
'f', 'g', 'h', 'i', 'j', 'k', '\n',
'l', 'm', 'n', 'o', 'p', 'q', '\n',
'\n',
'r', 's', 't', 'u', 'v' };
int[] positions = new int[] {
1, 2, 3, 0,
1, 2, 0,
1, 2, 3, 4, 5, 6, 0,
1, 2, 3, 4, 5, 6, 0,
0,
1, 2, 3, 4, 5 };
int[] lines = new int[] {
1, 1, 1, 2,
2, 2, 3,
3, 3, 3, 3, 3, 3, 4,
4, 4, 4, 4, 4, 4, 5,
6,
6, 6, 6, 6, 6 };
bool[] starts = new bool[] {
false, false, false, true,
false, false, true,
false, false, false, false, false, false, true,
false, false, false, false, false, false, true,
true,
false, false, false, false, false
};
int i=0;
int ch;
while ((ch = _rdr.Read()) != -1)
{
Expect(ch, EqualTo(chars[i]));
Expect(_rdr.Position, EqualTo(positions[i]));
Expect(_rdr.LineNumber, EqualTo(lines[i]));
Expect(_rdr.AtLineStart, EqualTo(starts[i]));
++i;
}
}
[Test]
public void Reads_lines_at_a_time()
{
string[] lines = new string[] {
"abc",
"de",
"fghijk",
"lmnopq",
"",
"rstuv" };
int[] positions = new int[] {
0,0,0,0,0,5 };
int[] lineNums = new int[] {
2, 3, 4, 5, 6, 6 };
bool[] starts = new bool[] {
true, true, true, true, true, true
};
int index = 0;
string line;
while ((line = _rdr.ReadLine()) != null)
{
Expect(line, EqualTo(lines[index]));
Expect(_rdr.Position, EqualTo(positions[index]));
Expect(_rdr.LineNumber, EqualTo(lineNums[index]));
Expect(_rdr.AtLineStart, EqualTo(starts[index]));
++index;
}
}
[Test]
public void Reads_blocks_just_fine()
{
char[][] buffers = new char[][] {
new char[] { 'a', 'b', 'c', '\n', 'd' },
new char[] { 'e', '\n', 'f', 'g', 'h' },
new char[] { 'i', 'j', 'k', '\n', 'l' },
new char[] { 'm', 'n', 'o', 'p', 'q' },
new char[] { '\n', '\n', 'r', 's', 't' },
new char[] { 'u', 'v' } };
int[] positions = new int[] { 1, 3, 1, 6, 3, 5 };
int[] lineNums = new int[] { 2, 3, 4, 4, 6, 6 };
bool[] starts = new bool[] { false, false, false, false, false, true, };
char[] buffer = new char[20];
int index = 0;
int count;
while ((count = _rdr.Read(buffer, 0, 5)) != 0)
{
//Console.WriteLine("{0} {1}/{2} {3}/{4} {5}", index, _rdr.Position, positions[index], _rdr.LineNumber, lineNums[index], _rdr.AtLineStart);
Expect(SameContents(buffer, buffers[index], count));
Expect(_rdr.Position, EqualTo(positions[index]));
Expect(_rdr.LineNumber, EqualTo(lineNums[index]));
Expect(_rdr.AtLineStart, EqualTo(starts[index]));
++index;
}
}
bool SameContents(char[] b1, char[] b2, int count)
{
for (int i = 0; i < count; i++)
if (b1[i] != b2[i])
return false;
return true;
}
[Test]
[ExpectedException(typeof(IOException))]
public void Double_unread_fails()
{
_rdr.Unread('a');
_rdr.Unread('b');
}
[Test]
public void Basic_unread_works()
{
int c1 = _rdr.Read();
Expect(c1, EqualTo((int)'a'));
Expect(_rdr.Position, EqualTo(1));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
int c2 = _rdr.Read();
Expect(c2, EqualTo((int)'b'));
Expect(_rdr.Position, EqualTo(2));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
_rdr.Unread('x');
Expect(_rdr.Position, EqualTo(1));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
int c3 = _rdr.Read();
Expect(c3, EqualTo((int)'x'));
Expect(_rdr.Position, EqualTo(2));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
int c4 = _rdr.Read();
Expect(c4, EqualTo((int)'c'));
Expect(_rdr.Position, EqualTo(3));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
}
[Test]
public void UnreadingNewlineWorks()
{
int c1 = _rdr.Read();
Expect(c1, EqualTo((int)'a'));
Expect(_rdr.Position, EqualTo(1));
Expect(_rdr.LineNumber, EqualTo(1));
Expect(_rdr.AtLineStart, False);
int
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