(GH-2897) Add tests for MyGetProvider

*  fixes #2897

src/Cake.Common.Tests/Fixtures/Build/MyGetFixture.cs

@@ -0,0 +1,34 @@
+using Cake.Common.Build.MyGet;
+using Cake.Common.Tests.Fakes;
+using Cake.Core;
+using NSubstitute;
+
+namespace Cake.Common.Tests.Fixtures.Build
+{
+    internal sealed class MyGetFixture
+    {
+        public ICakeEnvironment Environment { get; set; }
+
+        public FakeBuildSystemServiceMessageWriter Writer { get; set; }
+
+        public MyGetFixture()
+        {
+            Environment = Substitute.For<ICakeEnvironment>();
+            Environment.GetEnvironmentVariable("BuildRunner").Returns((string)null);
+            Writer = new FakeBuildSystemServiceMessageWriter();
+        }
+
+        public void IsRunningOnMyGet(bool? capitalCase = default)
+        {
+            var buildRunnerValue = "MyGet";
+            if (capitalCase.HasValue)
+            {
+                buildRunnerValue = capitalCase.Value ? "MYGET" : "myget";
+            }
+
+            Environment.GetEnvironmentVariable("BuildRunner").Returns(buildRunnerValue);
+        }
+
+        public MyGetProvider CreateMyGetProvider() => new MyGetProvider(Environment, Writer);
+    }
+}

src/Cake.Common.Tests/Unit/Build/MyGet/MyGetProviderTests.cs

@@ -0,0 +1,179 @@
+using Cake.Common.Build.MyGet;
+using Cake.Common.Tests.Fakes;
+using Cake.Common.Tests.Fixtures.Build;
+using Cake.Core;
+using Cake.Testing;
+using Xunit;
+
+namespace Cake.Common.Tests.Unit.Build.MyGet
+{
+    public sealed class MyGetProviderTests
+    {
+        public sealed class TheConstructor
+        {
+            [Fact]
+            public void Should_Throw_If_Environment_Is_Null()
+            {
+                // Given, When
+                var writer = new FakeBuildSystemServiceMessageWriter();
+                var result = Record.Exception(() => new MyGetProvider(null, writer));
+
+                // Then
+                AssertEx.IsArgumentNullException(result, "environment");
+            }
+
+            [Fact]
+            public void Should_Throw_If_Writer_Is_Null()
+            {
+                // Given, When
+                var result = Record.Exception(() => new MyGetProvider(new FakeEnvironment(PlatformFamily.Unknown), null));
+
+                // Then
+                AssertEx.IsArgumentNullException(result, "writer");
+            }
+        }
+
+        public sealed class IsRunningOnMyGet
+        {
+            [Theory]
+            [InlineData(true)]
+            [InlineData(false)]
+            [InlineData(null)]
+            public void Should_Return_True_If_Running_On_MyGet(bool? capitalCase)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                fixture.IsRunningOnMyGet(capitalCase);
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                var result = provider.IsRunningOnMyGet;
+
+                // Then
+                Assert.True(result);
+            }
+
+            [Fact]
+            public void Should_Return_False_If_Not_Running_On_MyGet()
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                var result = provider.IsRunningOnMyGet;
+
+                // Then
+                Assert.False(result);
+            }
+        }
+
+        public sealed class BuildProblem
+        {
+            [Theory]
+            [InlineData("Test build problem", "Test build problem")]
+            [InlineData("", "")]
+            [InlineData(null, "")]
+            [InlineData("[Special characters:\r\n\"\'test|split\'\"]", "|[Special characters:|r|n\"|\'test||split|\'\"|]")]
+            public void Should_Log_Description(string description, string expectedOutput)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                provider.BuildProblem(description);
+
+                // Then
+                var entry = Assert.Single(fixture.Writer.Entries);
+                Assert.Equal($"##myget[buildProblem description='{expectedOutput}']", entry);
+            }
+        }
+
+        public sealed class SetParameter
+        {
+            [Theory]
+            [InlineData("Parameter", "Value", "Parameter", "Value")]
+            [InlineData("", "", "", "")]
+            [InlineData(null, null, "", "")]
+            [InlineData("Special [param] \'name\'", "test\n|\r||value||", "Special |[param|] |\'name|\'", "test|n|||r||||value||||")]
+            public void Should_Log_Parameter_Value(string name, string value, string expectedName, string expectedValue)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                provider.SetParameter(name, value);
+
+                // Then
+                var entry = Assert.Single(fixture.Writer.Entries);
+                Assert.Equal($"##myget[setParameter name='{expectedName}' value='{expectedValue}']", entry);
+            }
+        }
+
+        public sealed class WriteStatus
+        {
+            [Theory]
+            [InlineData("M", MyGetBuildStatus.Normal, "M", "NORMAL")]
+            [InlineData(null, MyGetBuildStatus.Warning, "", "WARNING")]
+            [InlineData("Message \n text", MyGetBuildStatus.Error, "Message |n text", "ERROR")]
+            [InlineData("[Failure]|status", MyGetBuildStatus.Failure, "|[Failure|]||status", "FAILURE")]
+            public void Should_Log_Status(string message, MyGetBuildStatus status, string expectedMessage, string expectedStatus)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                provider.WriteStatus(message, status);
+
+                // Then
+                var entry = Assert.Single(fixture.Writer.Entries);
+                Assert.Equal($"##myget[message text='{expectedMessage}' status='{expectedStatus}']", entry);
+            }
+
+            [Theory]
+            [InlineData("Hello, World!", MyGetBuildStatus.Normal, "", "Hello, World!", "NORMAL", "")]
+            [InlineData("My custom message", MyGetBuildStatus.Warning, "Hello, World!", "My custom message", "WARNING", "Hello, World!")]
+            [InlineData("Test", MyGetBuildStatus.Error, "r = (a - b) * c + (s1 & s2)", "Test", "ERROR", "r = (a - b) * c + (s1 & s2)")]
+            [InlineData("T", MyGetBuildStatus.Failure, "i = (b << 4) | c;\r\nr = a[i] / c;", "T", "FAILURE", "i = (b << 4) || c;|r|nr = a|[i|] / c;")]
+            public void Should_Log_Status_With_Error_Details(string message, MyGetBuildStatus status, string errorDetails, string expectedMessage, string expectedStatus, string expectedDetails)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                provider.WriteStatus(message, status, errorDetails);
+
+                // Then
+                var entry = Assert.Single(fixture.Writer.Entries);
+                Assert.Equal($"##myget[message text='{expectedMessage}' status='{expectedStatus}' errorDetails='{expectedDetails}']", entry);
+            }
+        }
+
+        public sealed class SetBuildNumber
+        {
+            [Theory]
+            [InlineData("2.3.1", "2.3.1")]
+            [InlineData("", "")]
+            [InlineData(null, "")]
+            [InlineData("99.4-beta", "99.4-beta")]
+            [InlineData("[net5.0\r\n\"\'beta|preview\'\"]", "|[net5.0|r|n\"|\'beta||preview|\'\"|]")]
+            public void Should_Log_Build_Number(string buildNumber, string expectedOutput)
+            {
+                // Given
+                var fixture = new MyGetFixture();
+                var provider = fixture.CreateMyGetProvider();
+
+                // When
+                provider.SetBuildNumber(buildNumber);
+
+                // Then
+                var entry = Assert.Single(fixture.Writer.Entries);
+                Assert.Equal($"##myget[buildNumber '{expectedOutput}']", entry);
+            }
+        }
+    }
+}

src/Cake.Common/Build/MyGet/MyGetProvider.cs

@@ -7,6 +7,7 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Linq;
+using System.Text;
 using Cake.Core;
 
 namespace Cake.Common.Build.MyGet
@@ -19,22 +20,25 @@ public sealed class MyGetProvider : IMyGetProvider
         private const string MessagePrefix = "##myget[";
         private const string MessagePostfix = "]";
 
-        private static readonly Dictionary<string, string> _sanitizationTokens;
+        private static readonly Dictionary<char, string> _sanitizationTokens;
+        private static readonly char[] _specialCharacters;
 
         private readonly ICakeEnvironment _environment;
         private readonly IBuildSystemServiceMessageWriter _writer;
 
         static MyGetProvider()
         {
-            _sanitizationTokens = new Dictionary<string, string>
+            _sanitizationTokens = new Dictionary<char, string>
             {
-                { "|", "||" },
-                { "\'", "|\'" },
-                { "\n", "|n" },
-                { "\r", "|r" },
-                { "[", "|['" },
-                { "]", "|]" }
+                { '|', "||" },
+                { '\'', "|\'" },
+                { '\n', "|n" },
+                { '\r', "|r" },
+                { '[', "|[" },
+                { ']', "|]" }
             };
+
+            _specialCharacters = _sanitizationTokens.Keys.ToArray();
         }
 
         /// <summary>
@@ -137,7 +141,7 @@ public void SetBuildNumber(string buildNumber)
 
         private void WriteServiceMessage(string messageName, string attributeValue)
         {
-            WriteServiceMessage(messageName, new Dictionary<string, string> { { " ", attributeValue } });
+            WriteServiceMessage(messageName, new Dictionary<string, string> { { string.Empty, attributeValue } });
         }
 
         private void WriteServiceMessage(string messageName, string attributeName, string attributeValue)
@@ -153,11 +157,12 @@ private void WriteServiceMessage(string messageName, Dictionary<string, string>
                     values
                         .Select(keypair =>
                         {
-                            if (string.IsNullOrWhiteSpace(keypair.Key))
+                            var sanitizedValue = Sanitize(keypair.Value);
+                            if (string.IsNullOrEmpty(keypair.Key))
                             {
-                                return string.Format(CultureInfo.InvariantCulture, "'{0}'", Sanitize(keypair.Value));
+                                return string.Format(CultureInfo.InvariantCulture, "'{0}'", sanitizedValue);
                             }
-                            return string.Format(CultureInfo.InvariantCulture, "{0}='{1}'", keypair.Key, Sanitize(keypair.Value));
+                            return string.Format(CultureInfo.InvariantCulture, "{0}='{1}'", keypair.Key, sanitizedValue);
                         })
                         .ToArray());
 
@@ -166,12 +171,33 @@ private void WriteServiceMessage(string messageName, Dictionary<string, string>
 
         private static string Sanitize(string source)
         {
-            foreach (var charPair in _sanitizationTokens)
+            if (string.IsNullOrEmpty(source))
+            {
+                return string.Empty;
+            }
+
+            // When source does not contain special characters, then it is possible to skip building new string.
+            // This approach can possibly iterate through string 2 times, but special characters are exceptional.
+            if (source.IndexOfAny(_specialCharacters) < 0)
+            {
+                return source;
+            }
+
+            var stringBuilder = new StringBuilder(source.Length * 2);
+            for (int index = 0; index < source.Length; index++)
             {
-                source = source.Replace(charPair.Key, charPair.Value);
+                char sourceChar = source[index];
+                if (_sanitizationTokens.TryGetValue(sourceChar, out var replacement))
+                {
+                    stringBuilder.Append(replacement);
+                }
+                else
+                {
+                    stringBuilder.Append(sourceChar);
+                }
             }
 
-            return source;
+            return stringBuilder.ToString();
         }
     }
 }