// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.Build.Shared;
using Xunit;
 
 
 
#nullable disable
 
namespace Microsoft.Build.UnitTests
{
    public class ResourceUtilitiesTests
    {
        [Fact]
        public void ExtractMSBuildCode()
        {
            // most common message pattern
            string code;
            string messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB7007: This is a message.", out code);
            Assert.Equal("MSB7007", code);
            Assert.Equal("This is a message.", messageOnly);
 
            // no whitespace between colon and message is ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB7007:This is a message.", out code);
            Assert.Equal("MSB7007", code);
            Assert.Equal("This is a message.", messageOnly);
 
            // whitespace before code and after colon is ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "  MSB7007:   This is a message.", out code);
            Assert.Equal("MSB7007", code);
            Assert.Equal("This is a message.", messageOnly);
 
            // whitespace between code and colon is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB7007 : This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("MSB7007 : This is a message.", messageOnly);
 
            // whitespace in code is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB 7007: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("MSB 7007: This is a message.", messageOnly);
 
            // code with less than 4 digits is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB007: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("MSB007: This is a message.", messageOnly);
 
            // code without digits is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("MSB: This is a message.", messageOnly);
 
            // code without MSB prefix is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "1001: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("1001: This is a message.", messageOnly);
 
            // digits before MSB prefix is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "7001MSB: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("7001MSB: This is a message.", messageOnly);
 
            // mixing letters and digits is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "MSB564B: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("MSB564B: This is a message.", messageOnly);
 
            // lowercase code is not ok
            messageOnly = ResourceUtilities.ExtractMessageCode(true /* msbuild code only */, "msb1001: This is a message.", out code);
            Assert.Null(code);
            Assert.Equal("msb1001: This is a message.", messageOnly);
        }
    }
}