// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
#nullable disable
 
using Xunit;
 
namespace Microsoft.AspNetCore.Razor.Language;
 
public class SourceLocationTest
{
    [Fact]
    public void ConstructorWithLineAndCharacterIndexSetsAssociatedProperties()
    {
        // Act
        var loc = new SourceLocation(0, 42, 24);
 
        // Assert
        Assert.Null(loc.FilePath);
        Assert.Equal(0, loc.AbsoluteIndex);
        Assert.Equal(42, loc.LineIndex);
        Assert.Equal(24, loc.CharacterIndex);
    }
 
    [Fact]
    public void Constructor_SetsFilePathAndIndexes()
    {
        // Arrange
        var filePath = "some-file-path";
        var absoluteIndex = 133;
        var lineIndex = 23;
        var characterIndex = 12;
 
        // Act
        var sourceLocation = new SourceLocation(filePath, absoluteIndex, lineIndex, characterIndex);
 
        // Assert
        Assert.Equal(filePath, sourceLocation.FilePath);
        Assert.Equal(absoluteIndex, sourceLocation.AbsoluteIndex);
        Assert.Equal(lineIndex, sourceLocation.LineIndex);
        Assert.Equal(characterIndex, sourceLocation.CharacterIndex);
    }
 
    [Theory]
    [InlineData(null)]
    [InlineData("some-file")]
    public void GetHashCode_ReturnsSameValue_WhenEqual(string path)
    {
        // Arrange
        var sourceLocationA = new SourceLocation(path, 10, 3, 4);
        var sourceLocationB = new SourceLocation(path, 10, 3, 4);
        var sourceLocationC = new SourceLocation(path, 10, 45, 8754);
 
        // Act
        var hashCodeA = sourceLocationA.GetHashCode();
        var hashCodeB = sourceLocationB.GetHashCode();
        var hashCodeC = sourceLocationC.GetHashCode();
 
        // Assert
        Assert.Equal(hashCodeA, hashCodeB);
        Assert.Equal(hashCodeA, hashCodeC);
    }
 
    [Fact]
    public void Equals_ReturnsFalse_FilePathsNullAndAbsoluteIndicesMatch()
    {
        // Arrange
        var sourceLocationA = new SourceLocation(10, 3, 4);
        var sourceLocationB = new SourceLocation(10, 45, 8754);
 
        // Act
        var result = sourceLocationA.Equals(sourceLocationB);
 
        // Assert
        Assert.False(result);
    }
 
    [Fact]
    public void Equals_ReturnsFalse_IfFilePathIsDifferent()
    {
        // Arrange
        var sourceLocationA = new SourceLocation(10, 3, 4);
        var sourceLocationB = new SourceLocation("different-file", 10, 3, 4);
 
        // Act
        var result = sourceLocationA.Equals(sourceLocationB);
 
        // Assert
        Assert.False(result);
    }
 
    [Theory]
    [InlineData(null)]
    [InlineData("some-file")]
    public void Equals_ReturnsTrue_IfFilePathAndIndexesAreSame(string path)
    {
        // Arrange
        var sourceLocationA = new SourceLocation(path, 10, 3, 4);
        var sourceLocationB = new SourceLocation(path, 10, 3, 4);
        var sourceLocationC = new SourceLocation("different-path", 10, 3, 4);
 
        // Act
        var result1 = sourceLocationA.Equals(sourceLocationB);
        var result2 = sourceLocationA.Equals(sourceLocationC);
 
        // Assert
        Assert.True(result1);
        Assert.False(result2);
    }
}