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Fix a null-ref exception in DynamicHelpImpl #2292

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Merged
merged 2 commits into from
Mar 11, 2021
Merged

Fix a null-ref exception in DynamicHelpImpl #2292

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35d236f
Fix a null-ref exception in 'DynamicHelpImpl'
daxian-dbw Mar 10, 2021
b8ce50c
Add 2 tests
daxian-dbw Mar 11, 2021
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3 changes: 3 additions & 0 deletions PSReadLine/DynamicHelp.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,9 @@ private void DynamicHelpImpl(bool isFullHelp)
string commandName = null;
string parameterName = null;

// Simply return if nothing is rendered yet.
if (_singleton._tokens == null) { return; }

foreach(var token in _singleton._tokens)
{
var extent = token.Extent;
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14 changes: 14 additions & 0 deletions test/DynamicHelpTest.cs
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Expand Up @@ -97,6 +97,13 @@ private static PSObject GetParameterHelpObject(string description)
return paramHelp;
}

[SkippableFact]
public void DynHelp_GetFullHelp_OnEmptyLine()
{
TestSetup(KeyMode.Cmd);
Test("", Keys(_.F1, _.Enter));
}

[SkippableFact]
public void DynHelp_GetFullHelp()
{
Expand All @@ -108,6 +115,13 @@ public void DynHelp_GetFullHelp()
));
}

[SkippableFact]
public void DynHelp_GetParameterHelp_OnEmptyLine()
{
TestSetup(KeyMode.Cmd);
Test("", Keys(_.Alt_h, _.Enter));
}

[SkippableFact]
public void DynHelp_GetParameterHelp_And_Clear()
{
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