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Fixed null ref exception in GetSignatureHelp (#175)

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- Fixed a few places where ScriptParseInfo was being used before it was verified to be non-null
- Added 1 basic test for GetSignatureHelp scenario
This commit is contained in:
Connor Quagliana
2016-12-09 15:18:08 -08:00
committed by Kevin Cunnane
parent 431dfa4156
commit 40c1434745
3 changed files with 62 additions and 7 deletions
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15
src/Microsoft.SqlTools.ServiceLayer/LanguageServices/LanguageService.cs
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@@ -847,6 +847,12 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
ScriptParseInfo scriptParseInfo = GetScriptParseInfo(textDocumentPosition.TextDocument.Uri);
if (scriptParseInfo == null)
{
// Cache not set up yet - skip and wait until later
return null;
}
ConnectionInfo connInfo;
LanguageService.ConnectionServiceInstance.TryFindConnection(
scriptFile.ClientFilePath,
@@ -858,7 +864,7 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
ParseAndBind(scriptFile, connInfo);
}
if (scriptParseInfo != null && scriptParseInfo.ParseResult != null)
if (scriptParseInfo.ParseResult != null)
{
if (Monitor.TryEnter(scriptParseInfo.BuildingMetadataLock))
{
@@ -928,13 +934,14 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
// get the current script parse info object
ScriptParseInfo scriptParseInfo = GetScriptParseInfo(textDocumentPosition.TextDocument.Uri);
ScriptDocumentInfo scriptDocumentInfo = new ScriptDocumentInfo(textDocumentPosition, scriptFile, scriptParseInfo);
if (scriptParseInfo == null)
{
return AutoCompleteHelper.GetDefaultCompletionItems(scriptDocumentInfo, useLowerCaseSuggestions);
return AutoCompleteHelper.GetDefaultCompletionItems(ScriptDocumentInfo.CreateDefaultDocumentInfo(textDocumentPosition, scriptFile), useLowerCaseSuggestions);
}
ScriptDocumentInfo scriptDocumentInfo = new ScriptDocumentInfo(textDocumentPosition, scriptFile, scriptParseInfo);
// reparse and bind the SQL statement if needed
if (RequiresReparse(scriptParseInfo, scriptFile))
{