// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
// Forked from StyleCop.Analyzers repo.
 
using System;
using Xunit;
 
namespace Microsoft.Extensions.LocalAnalyzers.Json.Test;
 
public class JsonScannerTest
{
    [Fact]
    public void TestUnexpectedLookahead()
    {
        JsonParseException ex;
 
        ex = Assert.ThrowsAny<JsonParseException>(() => JsonValue.Parse("trUe"));
        Assert.Equal(ParsingError.InvalidOrUnexpectedCharacter, ex.Error);
        Assert.Equal(0, ex.Position.Line);
        Assert.Equal(2, ex.Position.Column);
 
        ex = Assert.ThrowsAny<JsonParseException>(() => JsonValue.Parse("tr"));
        Assert.Equal(ParsingError.IncompleteMessage, ex.Error);
        Assert.Equal(0, ex.Position.Line);
        Assert.Equal(2, ex.Position.Column);
    }
 
    [Fact]
    public void TestIncompleteComment()
    {
        var ex = Assert.ThrowsAny<JsonParseException>(() => JsonValue.Parse("{ /1 }"));
 
        Assert.Equal(ParsingError.InvalidOrUnexpectedCharacter, ex.Error);
        Assert.Contains("'1'", ex.Message);
        Assert.Equal(0, ex.Position.Line);
        Assert.Equal(3, ex.Position.Column);
 
        ex = Assert.ThrowsAny<JsonParseException>(() => JsonValue.Parse("{ // ignored text }"));
 
        Assert.Equal(ParsingError.IncompleteMessage, ex.Error);
 
        ex = Assert.ThrowsAny<JsonParseException>(() => JsonValue.Parse("{ /* ignored text }"));
 
        Assert.Equal(ParsingError.IncompleteMessage, ex.Error);
    }
 
    [Fact]
    public void TestBlockCommentTermination()
    {
        var obj = JsonValue.Parse("{ /* * / */ }");
 
        Assert.Equal(JsonValueType.Object, obj.Type);
        Assert.Equal(0, obj.AsJsonObject?.Count);
    }
}