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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Threading;
using System.Web.Razor.Generator;
using System.Web.Razor.Parser.SyntaxTree;
using System.Web.Razor.Test.Framework;
using System.Web.Razor.Test.Utils;
using System.Web.Razor.Text;
using System.Web.WebPages.TestUtils;
using Xunit;
namespace System.Web.Razor.Test.Parser.PartialParsing
{
public abstract class PartialParsingTestBase<TLanguage>
where TLanguage : RazorCodeLanguage, new()
{
private const string TestLinePragmaFileName = "C:\\This\\Path\\Is\\Just\\For\\Line\\Pragmas.cshtml";
protected static void RunFullReparseTest(TextChange change, PartialParseResult additionalFlags = (PartialParseResult)0)
{
// Arrange
TestParserManager manager = CreateParserManager();
manager.InitializeWithDocument(change.OldBuffer);
// Act
PartialParseResult result = manager.CheckForStructureChangesAndWait(change);
// Assert
Assert.Equal(PartialParseResult.Rejected | additionalFlags, result);
Assert.Equal(2, manager.ParseCount);
}
protected static void RunPartialParseTest(TextChange change, Block newTreeRoot, PartialParseResult additionalFlags = (PartialParseResult)0)
{
// Arrange
TestParserManager manager = CreateParserManager();
manager.InitializeWithDocument(change.OldBuffer);
// Act
PartialParseResult result = manager.CheckForStructureChangesAndWait(change);
// Assert
Assert.Equal(PartialParseResult.Accepted | additionalFlags, result);
Assert.Equal(1, manager.ParseCount);
ParserTestBase.EvaluateParseTree(manager.Parser.CurrentParseTree, newTreeRoot);
}
protected static TestParserManager CreateParserManager()
{
RazorEngineHost host = CreateHost();
RazorEditorParser parser = new RazorEditorParser(host, TestLinePragmaFileName);
return new TestParserManager(parser);
}
protected static RazorEngineHost CreateHost()
{
return new RazorEngineHost(new TLanguage())
{
GeneratedClassContext = new GeneratedClassContext("Execute", "Write", "WriteLiteral", "WriteTo", "WriteLiteralTo", "Template", "DefineSection"),
DesignTimeMode = true
};
}
protected static void RunTypeKeywordTest(string keyword)
{
string before = "@" + keyword.Substring(0, keyword.Length - 1);
string after = "@" + keyword;
StringTextBuffer changed = new StringTextBuffer(after);
StringTextBuffer old = new StringTextBuffer(before);
RunFullReparseTest(new TextChange(keyword.Length, 0, old, 1, changed), additionalFlags: PartialParseResult.SpanContextChanged);
}
protected class TestParserManager
{
public RazorEditorParser Parser;
public ManualResetEventSlim ParserComplete;
public int ParseCount;
public TestParserManager(RazorEditorParser parser)
{
ParserComplete = new ManualResetEventSlim();
ParseCount = 0;
Parser = parser;
parser.DocumentParseComplete += (sender, args) =>
{
Interlocked.Increment(ref ParseCount);
ParserComplete.Set();
};
}
public void InitializeWithDocument(ITextBuffer startDocument)
{
CheckForStructureChangesAndWait(new TextChange(0, 0, new StringTextBuffer(String.Empty), startDocument.Length, startDocument));
}
public PartialParseResult CheckForStructureChangesAndWait(TextChange change)
{
PartialParseResult result = Parser.CheckForStructureChanges(change);
if (result.HasFlag(PartialParseResult.Rejected))
{
WaitForParse();
}
return result;
}
public void WaitForParse()
{
MiscUtils.DoWithTimeoutIfNotDebugging(ParserComplete.Wait); // Wait for the parse to finish
ParserComplete.Reset();
}
}
}
}
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