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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.IO;
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.Text;
using System.Web.Razor.Tokenizer.Symbols;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Razor.Test.Parser
{
public class ParserContextTest
{
[Fact]
public void ConstructorRequiresNonNullSource()
{
var codeParser = new CSharpCodeParser();
Assert.ThrowsArgumentNull(() => new ParserContext(null, codeParser, new HtmlMarkupParser(), codeParser), "source");
}
[Fact]
public void ConstructorRequiresNonNullCodeParser()
{
var codeParser = new CSharpCodeParser();
Assert.ThrowsArgumentNull(() => new ParserContext(new SeekableTextReader(TextReader.Null), null, new HtmlMarkupParser(), codeParser), "codeParser");
}
[Fact]
public void ConstructorRequiresNonNullMarkupParser()
{
var codeParser = new CSharpCodeParser();
Assert.ThrowsArgumentNull(() => new ParserContext(new SeekableTextReader(TextReader.Null), codeParser, null, codeParser), "markupParser");
}
[Fact]
public void ConstructorRequiresNonNullActiveParser()
{
Assert.ThrowsArgumentNull(() => new ParserContext(new SeekableTextReader(TextReader.Null), new CSharpCodeParser(), new HtmlMarkupParser(), null), "activeParser");
}
[Fact]
public void ConstructorThrowsIfActiveParserIsNotCodeOrMarkupParser()
{
Assert.ThrowsArgument(() => new ParserContext(new SeekableTextReader(TextReader.Null), new CSharpCodeParser(), new HtmlMarkupParser(), new CSharpCodeParser()),
"activeParser",
RazorResources.ActiveParser_Must_Be_Code_Or_Markup_Parser);
}
[Fact]
public void ConstructorAcceptsActiveParserIfIsSameAsEitherCodeOrMarkupParser()
{
var codeParser = new CSharpCodeParser();
var markupParser = new HtmlMarkupParser();
new ParserContext(new SeekableTextReader(TextReader.Null), codeParser, markupParser, codeParser);
new ParserContext(new SeekableTextReader(TextReader.Null), codeParser, markupParser, markupParser);
}
[Fact]
public void ConstructorInitializesProperties()
{
// Arrange
SeekableTextReader expectedBuffer = new SeekableTextReader(TextReader.Null);
CSharpCodeParser expectedCodeParser = new CSharpCodeParser();
HtmlMarkupParser expectedMarkupParser = new HtmlMarkupParser();
// Act
ParserContext context = new ParserContext(expectedBuffer, expectedCodeParser, expectedMarkupParser, expectedCodeParser);
// Assert
Assert.NotNull(context.Source);
Assert.Same(expectedCodeParser, context.CodeParser);
Assert.Same(expectedMarkupParser, context.MarkupParser);
Assert.Same(expectedCodeParser, context.ActiveParser);
}
[Fact]
public void CurrentCharacterReturnsCurrentCharacterInTextBuffer()
{
// Arrange
ParserContext context = SetupTestContext("bar", b => b.Read());
// Act
char actual = context.CurrentCharacter;
// Assert
Assert.Equal('a', actual);
}
[Fact]
public void CurrentCharacterReturnsNulCharacterIfTextBufferAtEOF()
{
// Arrange
ParserContext context = SetupTestContext("bar", b => b.ReadToEnd());
// Act
char actual = context.CurrentCharacter;
// Assert
Assert.Equal('\0', actual);
}
[Fact]
public void EndOfFileReturnsFalseIfTextBufferNotAtEOF()
{
// Arrange
ParserContext context = SetupTestContext("bar");
// Act/Assert
Assert.False(context.EndOfFile);
}
[Fact]
public void EndOfFileReturnsTrueIfTextBufferAtEOF()
{
// Arrange
ParserContext context = SetupTestContext("bar", b => b.ReadToEnd());
// Act/Assert
Assert.True(context.EndOfFile);
}
[Fact]
public void StartBlockCreatesNewBlock()
{
// Arrange
ParserContext context = SetupTestContext("phoo");
// Act
context.StartBlock(BlockType.Expression);
// Assert
Assert.Equal(1, context.BlockStack.Count);
Assert.Equal(BlockType.Expression, context.BlockStack.Peek().Type);
}
[Fact]
public void EndBlockAddsCurrentBlockToParentBlock()
{
// Arrange
Mock<ParserVisitor> mockListener = new Mock<ParserVisitor>();
ParserContext context = SetupTestContext("phoo");
// Act
context.StartBlock(BlockType.Expression);
context.StartBlock(BlockType.Statement);
context.EndBlock();
// Assert
Assert.Equal(1, context.BlockStack.Count);
Assert.Equal(BlockType.Expression, context.BlockStack.Peek().Type);
Assert.Equal(1, context.BlockStack.Peek().Children.Count);
Assert.Equal(BlockType.Statement, ((Block)context.BlockStack.Peek().Children[0]).Type);
}
[Fact]
public void AddSpanAddsSpanToCurrentBlockBuilder()
{
// Arrange
var factory = SpanFactory.CreateCsHtml();
Mock<ParserVisitor> mockListener = new Mock<ParserVisitor>();
ParserContext context = SetupTestContext("phoo");
SpanBuilder builder = new SpanBuilder()
{
Kind = SpanKind.Code
};
builder.Accept(new CSharpSymbol(1, 0, 1, "foo", CSharpSymbolType.Identifier));
Span added = builder.Build();
using (context.StartBlock(BlockType.Functions))
{
context.AddSpan(added);
}
BlockBuilder expected = new BlockBuilder()
{
Type = BlockType.Functions,
};
expected.Children.Add(added);
// Assert
ParserTestBase.EvaluateResults(context.CompleteParse(), expected.Build());
}
[Fact]
public void SwitchActiveParserSetsMarkupParserAsActiveIfCodeParserCurrentlyActive()
{
// Arrange
var codeParser = new CSharpCodeParser();
var markupParser = new HtmlMarkupParser();
ParserContext context = SetupTestContext("barbazbiz", b => b.Read(), codeParser, markupParser, codeParser);
Assert.Same(codeParser, context.ActiveParser);
// Act
context.SwitchActiveParser();
// Assert
Assert.Same(markupParser, context.ActiveParser);
}
[Fact]
public void SwitchActiveParserSetsCodeParserAsActiveIfMarkupParserCurrentlyActive()
{
// Arrange
var codeParser = new CSharpCodeParser();
var markupParser = new HtmlMarkupParser();
ParserContext context = SetupTestContext("barbazbiz", b => b.Read(), codeParser, markupParser, markupParser);
Assert.Same(markupParser, context.ActiveParser);
// Act
context.SwitchActiveParser();
// Assert
Assert.Same(codeParser, context.ActiveParser);
}
private ParserContext SetupTestContext(string document)
{
var codeParser = new CSharpCodeParser();
var markupParser = new HtmlMarkupParser();
return SetupTestContext(document, b => { }, codeParser, markupParser, codeParser);
}
private ParserContext SetupTestContext(string document, Action<TextReader> positioningAction)
{
var codeParser = new CSharpCodeParser();
var markupParser = new HtmlMarkupParser();
return SetupTestContext(document, positioningAction, codeParser, markupParser, codeParser);
}
private ParserContext SetupTestContext(string document, Action<TextReader> positioningAction, ParserBase codeParser, ParserBase markupParser, ParserBase activeParser)
{
ParserContext context = new ParserContext(new SeekableTextReader(new StringReader(document)), codeParser, markupParser, activeParser);
positioningAction(context.Source);
return context;
}
}
}
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