Dependency Injection extensions

2026-07-19 07:49:29 +00:00 · 2021-07-10 10:59:27 +03:00
parent 5aaa0d318a
commit 7a764a5929
40 changed files with 1410 additions and 8 deletions
@@ -0,0 +1,72 @@
+using FluentAssertions;
+using Microsoft.Extensions.Options;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+using System;
+using System.Extensions.Configuration;
+
+namespace SystemExtensions.DependencyInjection.Tests.Configuration
+{
+    [TestClass]
+    public class OptionsResolverTests
+    {
+        private readonly OptionsResolver optionsResolver = new();
+        private readonly Mock<Slim.IServiceProvider> serviceProviderMock = new();
+        private readonly Mock<IOptionsManager> optionsManagerMock = new();
+
+        public Mock<IOptionsManager> OptionsManagerMock => optionsManagerMock;
+
+        [TestMethod]
+        public void CanResolve_ILiveOptions_ReturnsTrue()
+        {
+            var type = typeof(IOptions<string>);
+
+            var canResolve = this.optionsResolver.CanResolve(type);
+
+            canResolve.Should().BeTrue();
+        }
+
+        [TestMethod]
+        public void CanResolve_AnythingElse_ReturnsFalse()
+        {
+            var types = new Type[] { typeof(object), typeof(string), typeof(OptionsResolverTests), typeof(int) };
+
+            foreach (var type in types)
+            {
+                var canResolve = this.optionsResolver.CanResolve(type);
+
+                canResolve.Should().BeFalse();
+            }
+        }
+
+        [TestMethod]
+        public void Resolve_IOptions_ReturnsIOptions()
+        {
+            this.SetupServiceProvider();
+
+            var liveOptions = this.optionsResolver.Resolve(this.serviceProviderMock.Object, typeof(IOptions<string>));
+
+            liveOptions.Should().BeAssignableTo<IOptions<string>>();
+        }
+
+        [TestMethod]
+        public void Resolve_AnythingElse_Throws()
+        {
+            this.SetupServiceProvider();
+
+            Action action = new(() =>
+            {
+                this.optionsResolver.Resolve(this.serviceProviderMock.Object, typeof(string));
+            });
+
+            action.Should().Throw<Exception>();
+        }
+
+        private void SetupServiceProvider()
+        {
+            this.serviceProviderMock
+                .Setup(u => u.GetService<IOptionsManager>())
+                .Returns(this.OptionsManagerMock.Object);
+        }
+    }
+}