adds some tests

src/Umbraco.Tests.UnitTests/Umbraco.Core/Packaging/PendingPackageMigrationsTests.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.Extensions.Logging;
+using Moq;
+using NUnit.Framework;
+using Umbraco.Cms.Core;
+using Umbraco.Cms.Core.Packaging;
+
+namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.Packaging
+{
+    [TestFixture]
+    public class PendingPackageMigrationsTests
+    {
+        private static readonly Guid s_step1 = Guid.NewGuid();
+        private static readonly Guid s_step2 = Guid.NewGuid();
+        private const string PackageName = "Test1";
+
+        private class TestPackageMigrationPlan : PackageMigrationPlan
+        {
+            public TestPackageMigrationPlan() : base(PackageName)
+            {
+            }
+
+            protected override void DefinePlan()
+            {
+                To(s_step1);
+                To(s_step2);
+            }
+        }
+
+        private PendingPackageMigrations GetPendingPackageMigrations()
+            => new PendingPackageMigrations(
+                Mock.Of<ILogger<PendingPackageMigrations>>(),
+                new PackageMigrationPlanCollection(new[]
+                {
+                    new TestPackageMigrationPlan()
+                }));
+
+        [Test]
+        public void GivenNoRegisteredMigrations_ThenPlanIsReturned()
+        {
+            PendingPackageMigrations pendingPackageMigrations = GetPendingPackageMigrations();
+            var registeredMigrations = new Dictionary<string, string>();
+            IReadOnlyList<string> pending = pendingPackageMigrations.GetUmbracoPendingPackageMigrations(registeredMigrations);
+            Assert.AreEqual(1, pending.Count);
+        }
+
+        [Test]
+        public void GivenRegisteredMigration_WhenFinalStepMatched_ThenNoneAreReturned()
+        {
+            PendingPackageMigrations pendingPackageMigrations = GetPendingPackageMigrations();
+            var registeredMigrations = new Dictionary<string, string>
+            {
+                [Constants.Conventions.Migrations.KeyValuePrefix + PackageName] = s_step2.ToString()
+            };
+            IReadOnlyList<string> pending = pendingPackageMigrations.GetUmbracoPendingPackageMigrations(registeredMigrations);
+            Assert.AreEqual(0, pending.Count);
+        }
+
+        [Test]
+        public void GivenRegisteredMigration_WhenNonFinalStepMatched_ThenPlanIsReturned()
+        {
+            PendingPackageMigrations pendingPackageMigrations = GetPendingPackageMigrations();
+            var registeredMigrations = new Dictionary<string, string>
+            {
+                [Constants.Conventions.Migrations.KeyValuePrefix + PackageName] = s_step1.ToString()
+            };
+            IReadOnlyList<string> pending = pendingPackageMigrations.GetUmbracoPendingPackageMigrations(registeredMigrations);
+            Assert.AreEqual(1, pending.Count);
+        }
+
+        [Test]
+        public void GivenRegisteredMigration_WhenStepIsDifferentCase_ThenPlanIsReturned()
+        {
+            PendingPackageMigrations pendingPackageMigrations = GetPendingPackageMigrations();
+            var registeredMigrations = new Dictionary<string, string>
+            {
+                [Constants.Conventions.Migrations.KeyValuePrefix + PackageName] = s_step1.ToString().ToUpper()
+            };
+            IReadOnlyList<string> pending = pendingPackageMigrations.GetUmbracoPendingPackageMigrations(registeredMigrations);
+            Assert.AreEqual(1, pending.Count);
+        }
+    }
+}