Add tool to generate changelog for Azure SDK for Dotnet

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/Azure.SDK.Management.ChangelogGen.Tests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.2.8" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.8" />
+    <PackageReference Include="coverlet.collector" Version="3.1.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Azure.SDK.Management.ChangelogGen\Azure.SDK.Management.ChangelogGen.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="apiFile1.cs.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="apiFile2.cs.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="autorest1.md">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="changelog1.md">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="mergedChangelog1.md">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="specReadme.md">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/TestApiComparer.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using Azure.SDK.ChangelogGen.Compare;
+using Azure.SDK.ChangelogGen.Report;
+
+namespace Azure.SDK.ChangelogGen.Tests
+{
+    [TestClass]
+    public class TestApiComparer
+    {
+        [TestMethod]
+        public void TestCompareApiFile()
+        {
+            string content1 = File.ReadAllText("apiFile1.cs.txt");
+            string content2 = File.ReadAllText("apiFile2.cs.txt");
+            ChangeLogResult r = new ChangeLogResult();
+            r.ApiChange = Program.CompareApi(content2, content1);
+            Release release = r.GenerateReleaseNote("1.2.3", "2030.3.3", filter: new List<ChangeCatogory>() { ChangeCatogory.Obsoleted });
+
+            // we dont expect any breaking change in our release
+            // But in case any breaking changes detected, we will list them anyway so that people are able to notice these unexpected breaking changes when reviewing the changelog and fix them
+            string baseline =
+@"## 1.2.3 (2030.3.3)
+
+### Breaking Changes
+
+- Removed method 'String MethodToBeDeleted()' in type Azure.ResourceManager.AppService.TestMethod
+- Removed method 'String MethodChangeDefaultValue(Int32 param = 0)' in type Azure.ResourceManager.AppService.TestMethod
+- Removed method 'String MethodToChangeReturnType()' in type Azure.ResourceManager.AppService.TestMethod
+- Removed method 'String MethodToChangeParameter()' in type Azure.ResourceManager.AppService.TestMethod
+- Removed property 'String PropertyToBeDeleted' in type Azure.ResourceManager.AppService.TestProperty
+- Removed property method 'Get' for 'String PropertyToChangeToSet' in type Azure.ResourceManager.AppService.TestProperty
+- Removed property method 'Set' for 'String PropertyToChangeToGet' in type Azure.ResourceManager.AppService.TestProperty
+- Removed type 'Azure.ResourceManager.AppService.TypeToBeDeleted'
+
+### Other Changes
+
+- Obsoleted method 'Void StaticMethodToBeObsoleted()' in type Azure.ResourceManager.AppService.StaticTypeToBeObsoleted
+- Obsoleted method 'String MethodToBeObsoleted(String name, Int32 count, Boolean isEnabled, CancellationToken cancellationToken)' in type Azure.ResourceManager.AppService.TestMethod
+- Obsoleted property 'String StaticPropertyToBeObsoleted' in type Azure.ResourceManager.AppService.StaticTypeToBeObsoleted
+- Obsoleted property 'String PropertyToBeObsoleted' in type Azure.ResourceManager.AppService.TestProperty
+- Obsoleted type 'Azure.ResourceManager.AppService.TypeToBeObsoleted'
+- Obsoleted type 'Azure.ResourceManager.AppService.StaticTypeToBeObsoleted'";
+            string actual = release.ToString();
+            Assert.AreEqual(baseline.Replace("\r\n", "\n"), actual.Replace("\r\n", "\n"));
+        }
+    }
+
+}

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/TestCompareVersion.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Azure.SDK.ChangelogGen.Compare;
+
+namespace Azure.SDK.ChangelogGen.Tests
+{
+    [TestClass]
+    public class TestCompareVersion
+    {
+        [TestMethod]
+        public void TestVersionEqual()
+        {
+            StringValueChange? result = Program.CompareVersion("1.0.1", "1.0.1", "test version equal");
+            Assert.IsNull(result);
+        }
+
+        [TestMethod]
+        public void TestVersionNotEqual()
+        {
+            StringValueChange? result = Program.CompareVersion("1.0.2", "1.0.1", "test version equal");
+            Assert.IsNotNull(result);
+            Assert.AreEqual("1.0.2", result.NewValue);
+            Assert.AreEqual("1.0.1", result.OldValue);
+        }
+    }
+}

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/TestGetReleaseVersion.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Azure.SDK.ChangelogGen.Report;
+
+namespace Azure.SDK.ChangelogGen.Tests
+{
+    [TestClass]
+    public class TestGetReleaseVersion
+    {
+        [TestMethod]
+        public void TestReleasesFromChangelogMdFile()
+        {
+            string content = File.ReadAllText("changelog1.md");
+            List<Release> releases = Release.FromChangelog(content);
+            Assert.AreEqual(7, releases.Count);
+
+            Assert.AreEqual("1.1.0-beta.1", releases[0].Version);
+            Assert.AreEqual("Unreleased", releases[0].ReleaseDate);
+
+            Assert.AreEqual("1.0.1", releases[1].Version);
+            Assert.AreEqual("2023-02-20", releases[1].ReleaseDate);
+        }
+    }
+}

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/TestGetSpecVersion.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Azure.SDK.ChangelogGen.Utilities;
+
+namespace Azure.SDK.ChangelogGen.Tests
+{
+    [TestClass]
+    public class TestGetSpecVersion
+    {
+        [TestMethod]
+        public void TestGetSpecVersionFromMd()
+        {
+            var content = File.ReadAllText("autorest1.md");
+            List<string> tags = SpecHelper.GetSpecVersionTags(content, out string src);
+
+            Assert.AreEqual("./specReadme.md", src);
+            Assert.AreEqual(1, tags.Count);
+            Assert.AreEqual("package-2021-02", tags[0]);
+        }
+    }
+}

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/TestMergeChangelog.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using Azure.SDK.ChangelogGen.Compare;
+using Azure.SDK.ChangelogGen.Report;
+
+namespace Azure.SDK.ChangelogGen.Tests
+{
+    [TestClass]
+    public class TestMergeChangeLog
+    {
+        [TestMethod]
+        public void TestMergeWithExistingNote()
+        {
+            string content1 = File.ReadAllText("apiFile1.cs.txt");
+            string content2 = File.ReadAllText("apiFile2.cs.txt");
+            ChangeLogResult r = new ChangeLogResult
+            {
+                ApiChange = Program.CompareApi(content2, content1),
+                AzureCoreVersionChange = new StringValueChange("1.1.0", "1.0.1", "Azure Core upgraded"),
+                AzureResourceManagerVersionChange = new StringValueChange("1.2.0", "1.0.2", "Azure RM upgraded"),
+                SpecVersionChange = new StringValueChange("2020-01-01", "2030-01-01", "spec upgraded")
+            };
+
+            Release newRelease = r.GenerateReleaseNote("1.2.3", "2099-09-10", new List<ChangeCatogory>() { ChangeCatogory.Obsoleted });
+
+            var releases = Release.FromChangelog(File.ReadAllText("changelog1.md"));
+
+            newRelease.MergeTo(releases[0], MergeMode.Group);
+
+            var mergedChangelog = Release.ToChangeLog(releases);
+            var baseline = File.ReadAllText("mergedChangelog1.md");
+            Assert.AreEqual(baseline.Replace("\r\n", "\n").TrimEnd('\r', '\n'), mergedChangelog.Replace("\r\n", "\n"));
+        }
+    }
+
+}

tools/net-changelog-gen-mgmt/Azure.SDK.Management.ChangelogGen.Tests/Usings.cs

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+global using Microsoft.VisualStudio.TestTools.UnitTesting;