// 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 Microsoft.AspNetCore.Razor.Language.Legacy;
using Xunit;
 
namespace Microsoft.AspNetCore.Razor.Language;
 
public class SourceSpanTest
{
    [Fact]
    public void GeneratedCodeMappingsAreEqualIfDataIsEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        // Assert
        Assert.True(left.Equals(right));
        Assert.True(right.Equals(left));
        Assert.True(Equals(left, right));
    }
 
    [Fact]
    public void GeneratedCodeMappingsAreNotEqualIfCodeLengthIsNotEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 5),
            new SourceSpan(new SourceLocation(5, 6, 7), 9));
 
        // Assert
        AssertNotEqual(left, right);
    }
 
    [Fact]
    public void GeneratedCodeMappingsAreNotEqualIfStartGeneratedColumnIsNotEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 8), 8));
 
        // Assert
        AssertNotEqual(left, right);
    }
 
    [Fact]
    public void GeneratedCodeMappingsAreNotEqualIfStartColumnIsNotEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 8), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        // Assert
        AssertNotEqual(left, right);
    }
 
    [Fact]
    public void GeneratedCodeMappingsAreNotEqualIfStartLineIsNotEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 5, 7), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 1, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 8));
 
        // Assert
        AssertNotEqual(left, right);
    }
 
    [Fact]
    public void GeneratedCodeMappingsAreNotEqualIfAbsoluteIndexIsNotEqual()
    {
        // Arrange
        var left = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(4, 6, 7), 8));
 
        var right = new SourceMapping(
            new SourceSpan(new SourceLocation(1, 2, 3), 4),
            new SourceSpan(new SourceLocation(5, 6, 7), 9));
 
        // Assert
        AssertNotEqual(left, right);
    }
 
    private void AssertNotEqual(SourceMapping left, SourceMapping right)
    {
        Assert.False(left == right);
        Assert.False(left.Equals(right));
        Assert.False(right.Equals(left));
        Assert.False(Equals(left, right));
    }
}