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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.Editor;
using System.Web.Razor.Parser;
using System.Web.Razor.Parser.SyntaxTree;
using System.Web.Razor.Resources;
using System.Web.Razor.Test.Framework;
using System.Web.Razor.Test.Utils;
using System.Web.Razor.Text;
using System.Web.WebPages.TestUtils;
using Microsoft.CSharp;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Razor.Test.Editor
{
public class RazorEditorParserTest
{
private static readonly TestFile SimpleCSHTMLDocument = TestFile.Create("DesignTime.Simple.cshtml");
private static readonly TestFile SimpleCSHTMLDocumentGenerated = TestFile.Create("DesignTime.Simple.txt");
private const string TestLinePragmaFileName = "C:\\This\\Path\\Is\\Just\\For\\Line\\Pragmas.cshtml";
[Fact]
public void ConstructorRequiresNonNullHost()
{
Assert.ThrowsArgumentNull(() => new RazorEditorParser(null, TestLinePragmaFileName),
"host");
}
[Fact]
public void ConstructorRequiresNonNullPhysicalPath()
{
Assert.ThrowsArgumentNullOrEmptyString(() => new RazorEditorParser(CreateHost(), null),
"sourceFileName");
}
[Fact]
public void ConstructorRequiresNonEmptyPhysicalPath()
{
Assert.ThrowsArgumentNullOrEmptyString(() => new RazorEditorParser(CreateHost(), String.Empty),
"sourceFileName");
}
[Fact]
public void TreesAreDifferentReturnsTrueIfTreeStructureIsDifferent()
{
var factory = SpanFactory.CreateCsHtml();
Block original = new MarkupBlock(
factory.Markup("<p>"),
new ExpressionBlock(
factory.CodeTransition()),
factory.Markup("</p>"));
Block modified = new MarkupBlock(
factory.Markup("<p>"),
new ExpressionBlock(
factory.CodeTransition("@"),
factory.Code("f")
.AsImplicitExpression(CSharpCodeParser.DefaultKeywords, acceptTrailingDot: false)),
factory.Markup("</p>"));
ITextBuffer oldBuffer = new StringTextBuffer("<p>@</p>");
ITextBuffer newBuffer = new StringTextBuffer("<p>@f</p>");
Assert.True(RazorEditorParser.TreesAreDifferent(
original, modified, new[] {
new TextChange(position: 4, oldLength: 0, oldBuffer: oldBuffer, newLength: 1, newBuffer: newBuffer)
}));
}
[Fact]
public void TreesAreDifferentReturnsFalseIfTreeStructureIsSame()
{
var factory = SpanFactory.CreateCsHtml();
Block original = new MarkupBlock(
factory.Markup("<p>"),
new ExpressionBlock(
factory.CodeTransition(),
factory.Code("f")
.AsImplicitExpression(CSharpCodeParser.DefaultKeywords, acceptTrailingDot: false)),
factory.Markup("</p>"));
factory.Reset();
Block modified = new MarkupBlock(
factory.Markup("<p>"),
new ExpressionBlock(
factory.CodeTransition(),
factory.Code("foo")
.AsImplicitExpression(CSharpCodeParser.DefaultKeywords, acceptTrailingDot: false)),
factory.Markup("</p>"));
original.LinkNodes();
modified.LinkNodes();
ITextBuffer oldBuffer = new StringTextBuffer("<p>@f</p>");
ITextBuffer newBuffer = new StringTextBuffer("<p>@foo</p>");
Assert.False(RazorEditorParser.TreesAreDifferent(
original, modified, new[] {
new TextChange(position: 5, oldLength: 0, oldBuffer: oldBuffer, newLength: 2, newBuffer: newBuffer)
}));
}
[Fact]
public void CheckForStructureChangesRequiresNonNullBufferInChange()
{
TextChange change = new TextChange();
Assert.ThrowsArgument(
() => new RazorEditorParser(
CreateHost(),
"C:\\Foo.cshtml").CheckForStructureChanges(change),
"change",
String.Format(RazorResources.Structure_Member_CannotBeNull, "Buffer", "TextChange"));
}
private static RazorEngineHost CreateHost()
{
return new RazorEngineHost(new CSharpRazorCodeLanguage()) { DesignTimeMode = true };
}
[Fact]
public void CheckForStructureChangesStartsReparseAndFiresDocumentParseCompletedEventIfNoAdditionalChangesQueued()
{
// Arrange
using (RazorEditorParser parser = CreateClientParser())
{
StringTextBuffer input = new StringTextBuffer(SimpleCSHTMLDocument.ReadAllText());
DocumentParseCompleteEventArgs capturedArgs = null;
ManualResetEventSlim parseComplete = new ManualResetEventSlim(false);
parser.DocumentParseComplete += (sender, args) =>
{
capturedArgs = args;
parseComplete.Set();
};
// Act
parser.CheckForStructureChanges(new TextChange(0, 0, new StringTextBuffer(String.Empty), input.Length, input));
// Assert
MiscUtils.DoWithTimeoutIfNotDebugging(parseComplete.Wait);
Assert.Equal(
SimpleCSHTMLDocumentGenerated.ReadAllText(),
MiscUtils.StripRuntimeVersion(
capturedArgs.GeneratorResults.GeneratedCode.GenerateCode<CSharpCodeProvider>()
));
}
}
[Fact]
public void CheckForStructureChangesStartsFullReparseIfChangeOverlapsMultipleSpans()
{
// Arrange
RazorEditorParser parser = new RazorEditorParser(CreateHost(), TestLinePragmaFileName);
ITextBuffer original = new StringTextBuffer("Foo @bar Baz");
ITextBuffer changed = new StringTextBuffer("Foo @bap Daz");
TextChange change = new TextChange(7, 3, original, 3, changed);
ManualResetEventSlim parseComplete = new ManualResetEventSlim();
int parseCount = 0;
parser.DocumentParseComplete += (sender, args) =>
{
Interlocked.Increment(ref parseCount);
parseComplete.Set();
};
Assert.Equal(PartialParseResult.Rejected, parser.CheckForStructureChanges(new TextChange(0, 0, new StringTextBuffer(String.Empty), 12, original)));
MiscUtils.DoWithTimeoutIfNotDebugging(parseComplete.Wait); // Wait for the parse to finish
parseComplete.Reset();
// Act
PartialParseResult result = parser.CheckForStructureChanges(change);
// Assert
Assert.Equal(PartialParseResult.Rejected, result);
MiscUtils.DoWithTimeoutIfNotDebugging(parseComplete.Wait);
Assert.Equal(2, parseCount);
}
private static void SetupMockWorker(Mock<RazorEditorParser> parser, ManualResetEventSlim running)
{
SetUpMockWorker(parser, running, null);
}
private static void SetUpMockWorker(Mock<RazorEditorParser> parser, ManualResetEventSlim running, Action<int> backgroundThreadIdReceiver)
{
parser.Setup(p => p.CreateBackgroundTask(It.IsAny<RazorEngineHost>(), It.IsAny<string>(), It.IsAny<TextChange>()))
.Returns<RazorEngineHost, string, TextChange>((host, fileName, change) =>
{
var task = new Mock<BackgroundParseTask>(new RazorTemplateEngine(host), fileName, change) { CallBase = true };
task.Setup(t => t.Run(It.IsAny<CancellationToken>()))
.Callback<CancellationToken>((token) =>
{
if (backgroundThreadIdReceiver != null)
{
backgroundThreadIdReceiver(Thread.CurrentThread.ManagedThreadId);
}
running.Set();
while (!token.IsCancellationRequested)
{
}
});
return task.Object;
});
}
private TextChange CreateDummyChange()
{
return new TextChange(0, 0, new StringTextBuffer(String.Empty), 3, new StringTextBuffer("foo"));
}
private static Mock<RazorEditorParser> CreateMockParser()
{
return new Mock<RazorEditorParser>(CreateHost(), TestLinePragmaFileName) { CallBase = true };
}
private static RazorEditorParser CreateClientParser()
{
return new RazorEditorParser(CreateHost(), TestLinePragmaFileName);
}
}
}
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