public void GetReader_MoveIntoStreamCreateNewReaderAndCheckPosition()
{
// Setup tests data
string testInput = _codeSnippets[CodeType.SevenLinesOfAssignemtStatements];
// Count the code lines
Regex RE = new Regex("\n", RegexOptions.Multiline);
MatchCollection theMatches = RE.Matches(testInput);
int lines = theMatches.Count + 1;
// Create script source
ScriptSource source = _testEng.CreateScriptSourceFromString(testInput,
SourceCodeKind.Statements);
// Create first reader
SourceCodeReader srcFirstUnitReader = source.GetReader();
// This could be a little fragile. Might be better just to hard code
// expected value. - Save first line with first reader.
Assert.IsTrue(srcFirstUnitReader.SeekLine(1));
string expValue = srcFirstUnitReader.ReadLine();
// Move to the middle of the stream (approximately).
Assert.IsTrue(srcFirstUnitReader.SeekLine(lines / 2));
// Create second unit reader
SourceCodeReader srcSecondUnitReader = source.GetReader();
Assert.AreEqual(srcSecondUnitReader.ReadLine(), expValue);
}
/// <summary>
/// Creates a Lexer instance with the given source of text.
/// </summary>
/// <param name="source"> The source of javascript code. </param>
public Lexer(ScriptSource source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
this.source = source;
this.reader = source.GetReader();
this.lineNumber = 1;
this.columnNumber = 1;
}
/// <summary>
/// Creates a Lexer instance with the given source of text.
/// </summary>
/// <param name="engine"> The associated script engine. </param>
/// <param name="source"> The source of javascript code. </param>
public Lexer(ScriptEngine engine, ScriptSource source)
{
if (engine == null)
throw new ArgumentNullException("engine");
if (source == null)
throw new ArgumentNullException("source");
this.engine = engine;
this.source = source;
this.reader = source.GetReader();
this.lineNumber = 1;
this.columnNumber = 1;
}
public void GetReader_TwoIndependentReadersAccessingSameData()
{
string testInput = _codeSnippets[CodeType.SevenLinesOfAssignemtStatements];
StringBuilder strBuffer = new StringBuilder();
//Get the aprox midpoint length of codinput.
int codeMidPoint = testInput.Length / 2;
ScriptSource source = _testEng.CreateScriptSourceFromString(testInput,
SourceCodeKind.Statements);
// Create the Readers
SourceCodeReader srcFirstUnitReader = source.GetReader();
SourceCodeReader srcSecondUnitReader = source.GetReader();
int chrnbr = 0;
int cnt = 0;
// Read first half of stream with first stream reader
while (((chrnbr = srcFirstUnitReader.Read()) > 0) && (cnt < codeMidPoint))
{
strBuffer.Append((char)chrnbr);
cnt++; // inc cnt
// Increment Second Reader
srcSecondUnitReader.Read();
}
// Now get the second half of the input stream with second reader
while ((chrnbr = srcSecondUnitReader.Read()) > 0)
{
strBuffer.Append((char)chrnbr);
cnt++;
}
Assert.AreEqual(cnt, testInput.Length);
Assert.AreEqual(testInput, strBuffer.ToString());
}
/// <summary>
/// Creates a Lexer instance with the given source of text.
/// </summary>
/// <param name="engine"> The associated script engine. </param>
/// <param name="source"> The source of javascript code. </param>
public Lexer(ScriptEngine engine, ScriptSource source)
{
if (engine == null)
{
throw new ArgumentNullException("engine");
}
if (source == null)
{
throw new ArgumentNullException("source");
}
this.engine = engine;
this.source = source;
this.reader = source.GetReader();
this.lineNumber = 1;
this.columnNumber = 1;
}
public void GetReader_CreateMultipleDifferentInstances()
{
string testInput = _codeSnippets[CodeType.SevenLinesOfAssignemtStatements];
ScriptSource source = _testEng.CreateScriptSourceFromString(testInput,
SourceCodeKind.Statements);
// Storage for readers to test
SourceCodeReader prevStream = null, tmpStream = null;
for (int i = 0; i < 10; i++)
{
if (i > 0)
{
prevStream = tmpStream;
}
tmpStream = source.GetReader();
Assert.AreNotEqual(prevStream, tmpStream);
}
}
