Added Unittests for WorkflowRegistry

Author: dr-BEat

test/WorkflowCore.UnitTests/Services/WorkflowRegistryFixture.cs

@@ -0,0 +1,64 @@
+using FakeItEasy;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using WorkflowCore.Interface;
+using WorkflowCore.Models;
+using WorkflowCore.Services;
+using FluentAssertions;
+using Xunit;
+using WorkflowCore.Primitives;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace WorkflowCore.UnitTests.Services
+{
+    public class WorkflowRegistryFixture
+    {
+        protected IServiceProvider ServiceProvider { get; }
+        protected WorkflowRegistry Subject { get; }
+        protected WorkflowDefinition Definition { get; }
+
+        public WorkflowRegistryFixture()
+        {
+            ServiceProvider = A.Fake<IServiceProvider>();
+            Subject = new WorkflowRegistry(ServiceProvider);
+
+            Definition = new WorkflowDefinition{
+                Id = "TestWorkflow",
+                Version = 1,
+            };
+            Subject.RegisterWorkflow(Definition);
+        }
+
+        [Fact(DisplayName = "Should return existing workflow")]
+        public void getdefinition_should_return_existing_workflow()
+        {
+            Subject.GetDefinition(Definition.Id).Should().Be(Definition);
+            Subject.GetDefinition(Definition.Id, Definition.Version).Should().Be(Definition);
+        }
+
+        [Fact(DisplayName = "Should return null on unknown workflow")]
+        public void getdefinition_should_return_null_on_unknown()
+        {
+            Subject.GetDefinition("UnkownWorkflow").Should().BeNull();
+            Subject.GetDefinition("UnkownWorkflow", 1).Should().BeNull();
+        }
+
+        [Fact(DisplayName = "Should return highest version of existing workflow")]
+        public void getdefinition_should_return_highest_version_workflow()
+        {
+            var definition2 = new WorkflowDefinition{
+                Id = Definition.Id,
+                Version = Definition.Version + 1,
+            };
+            Subject.RegisterWorkflow(definition2);
+
+            Subject.GetDefinition(Definition.Id).Should().Be(definition2);
+            Subject.GetDefinition(Definition.Id, definition2.Version).Should().Be(definition2);
+            Subject.GetDefinition(Definition.Id, Definition.Version).Should().Be(Definition);
+        }
+    }
+}