public void TryUpdateBalanceCount_CompleteCharacterLiteral_CountsCorrectly()
{
// Arrange
var token = new CSharpSymbol("'('", CSharpSymbolType.CharacterLiteral);
var count = 2;
// Act
var result = ImplicitExpressionEditHandler.TryUpdateBalanceCount(token, ref count);
// Assert
Assert.True(result);
Assert.Equal(2, count);
}
public void TryUpdateBalanceCount_InvalidParenthesisCharacterLiteral_ReturnsFalse()
{
// Arrange
var token = new CSharpSymbol("')", CSharpSymbolType.CharacterLiteral);
var count = 0;
// Act
var result = ImplicitExpressionEditHandler.TryUpdateBalanceCount(token, ref count);
// Assert
Assert.False(result);
Assert.Equal(0, count);
}
public void TryUpdateBalanceCount_SingleRightParenthesis_CountsCorrectly()
{
// Arrange
var token = new CSharpSymbol(")", CSharpSymbolType.RightParenthesis);
var count = 2;
// Act
var result = ImplicitExpressionEditHandler.TryUpdateBalanceCount(token, ref count);
// Assert
Assert.True(result);
Assert.Equal(1, count);
}
// Internal for testing
internal static bool TryUpdateBalanceCount(CSharpSymbol token, ref int count)
{
var updatedCount = count;
if (token.Type == CSharpSymbolType.LeftParenthesis)
{
updatedCount++;
}
else if (token.Type == CSharpSymbolType.RightParenthesis)
{
if (updatedCount == 0)
{
return(false);
}
updatedCount--;
}
else if (token.Type == CSharpSymbolType.StringLiteral)
{
var content = token.Content;
if (content.Length > 0 && content[content.Length - 1] != '"')
{
// Incomplete string literal may have consumed some of our parenthesis and usually occurr during auto-completion of '"' => '""'.
if (!TryUpdateCountFromContent(content, ref updatedCount))
{
return(false);
}
}
}
else if (token.Type == CSharpSymbolType.CharacterLiteral)
{
var content = token.Content;
if (content.Length > 0 && content[content.Length - 1] != '\'')
{
// Incomplete character literal may have consumed some of our parenthesis and usually occurr during auto-completion of "'" => "''".
if (!TryUpdateCountFromContent(content, ref updatedCount))
{
return(false);
}
}
}
if (updatedCount < 0)
{
return(false);
}
count = updatedCount;
return(true);
}
// Internal for testing
internal static bool ContainsPosition(int position, CSharpSymbol currentToken)
{
var tokenStart = currentToken.Start.AbsoluteIndex;
if (tokenStart == position)
{
// Token is exactly at the insertion point.
return(true);
}
var tokenEnd = tokenStart + currentToken.Content.Length;
if (tokenStart < position && tokenEnd > position)
{
// Insertion point falls in the middle of the current token.
return(true);
}
return(false);
}