(split from main repo) Execute unit tests

The unit tests can now be invoked from a command line
with `-test` switch, e.g.:
```
> .\build.cmd -test
```

Notable changes:
* Rename unit tests projects
* Ignore unit tests for the external projects and the VSIX

Author: RussKie

Gerrit.Tests.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\Plugins\Gerrit\Gerrit.csproj" />
+    <ProjectReference Include="..\..\..\ResourceManager\ResourceManager.csproj" />
+  </ItemGroup>
+
+</Project>

Properties/AssemblyInfo.cs

@@ -0,0 +1,38 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+using CommonTestUtils;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("GerritTests")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("GerritTests")]
+[assembly: AssemblyCopyright("Copyright © 2019")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("2f8f55f7-c82f-44fc-ab52-9d0c692996fc")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+[assembly: TestAppSettings]

Server/CommandBuilderWithDraftSupportTests.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Gerrit.Server;
+using NUnit.Framework;
+
+namespace GerritTests.Server
+{
+    public static class CommandBuilderWithDraftSupportTests
+    {
+        [TestCase("a, b, c", "fix-7521", ExpectedResult = "refs/for/fix-7521%r=a,r=b,r=c")]
+        [TestCase("a|b|c", "fix-7521", ExpectedResult = "refs/for/fix-7521%r=a,r=b,r=c")]
+        [TestCase("a b c", "fix-7521", ExpectedResult = "refs/for/fix-7521%r=a,r=b,r=c")]
+        [TestCase("a; b;c", "fix-7521", ExpectedResult = "refs/for/fix-7521%r=a,r=b,r=c")]
+        [TestCase("q", "fix-7521", ExpectedResult = "refs/for/fix-7521%r=q")]
+        [TestCase("", "fix-7521", ExpectedResult = "refs/for/fix-7521")]
+        [TestCase(null, "fix-7521", ExpectedResult = "refs/for/fix-7521")]
+        public static string Build_WithReviewers_splits_reviewrs_and_builds_expected_command(string reviewer, string branch)
+        {
+            var sut = new CommandBuilderWithDraftSupport();
+            return sut.WithReviewers(reviewer).Build(branch);
+        }
+
+        [Test(ExpectedResult = "refs/drafts/master%r=a")]
+        public static string Build_when_publishtype_is_drafts_builds_expected_command()
+        {
+            var sut = new CommandBuilderWithDraftSupport();
+            return sut.WithReviewers("a").WithPublishType("drafts").Build("master");
+        }
+
+        [Test(ExpectedResult = "refs/for/fix-7521")]
+        public static string Build_with_all_values_on_default_builds_expected_command()
+        {
+            var sut = new CommandBuilderWithDraftSupport();
+            return sut.WithReviewers(string.Empty)
+                .WithCC(string.Empty)
+                .WithTopic(string.Empty)
+                .WithPublishType(string.Empty)
+                .WithHashTag(string.Empty)
+                .Build("fix-7521");
+        }
+
+        [Test(ExpectedResult = "refs/for/fix-7521%r=mygroup,cc=team2,topic=ABC-123,hashtag=what")]
+        public static string Build_with_values_for_all_options_builds_expected_command()
+        {
+            var sut = new CommandBuilderWithDraftSupport();
+            return sut.WithReviewers("mygroup")
+                .WithCC("team2")
+                .WithTopic("ABC-123")
+                .WithPublishType(string.Empty)
+                .WithHashTag("what")
+                .Build("fix-7521");
+        }
+    }
+}

Server/CommandBuilderWithPrivateSupportTests.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Gerrit.Server;
+using NUnit.Framework;
+
+namespace GerritTests.Server
+{
+    public static class CommandBuilderWithPrivateSupportTests
+    {
+        [TestCase("", ExpectedResult = "refs/for/mybranch")]
+        [TestCase("wip", ExpectedResult = "refs/for/mybranch%wip")]
+        [TestCase("private", ExpectedResult = "refs/for/mybranch%private")]
+        public static string Build_given_a_publishType_builds_expected_command(string publishType)
+        {
+            var sut = new CommandBuilderWithPrivateSupport();
+
+            return sut.WithPublishType(publishType).Build("mybranch");
+        }
+
+        [Test]
+        public static void Build_given_a_set_of_values_builds_expected_command()
+        {
+            var sut = new CommandBuilderWithPrivateSupport();
+
+            Assert.AreEqual("refs/for/master%r=myteam",
+                sut.WithReviewers("myteam").WithPublishType(string.Empty).Build("master"));
+        }
+    }
+}

Server/GerritCapabilityTests.cs

@@ -0,0 +1,30 @@
+using System.Linq;
+using Gerrit.Server;
+using NUnit.Framework;
+
+namespace GerritTests.Server
+{
+    public static class GerritCapabilityTests
+    {
+        [Test]
+        public static void PublishTypes_for_Version2_15_has_expected_list_of_values()
+        {
+            RunTest(GerritCapabilities.Version2_15, new[] { "", "wip", "private" });
+        }
+
+        [Test]
+        public static void PublishTypes_for_OlderVersion_has_expected_list_of_values()
+        {
+            RunTest(GerritCapabilities.OldestVersion, new[] { "", "drafts" });
+        }
+
+        private static void RunTest(GerritCapabilities capability, string[] expectedValues)
+        {
+            var publishTypes = capability.PublishTypes
+                .Select(x => x.Value)
+                .ToArray();
+
+            Assert.That(publishTypes, Is.EqualTo(expectedValues));
+        }
+    }
+}