Created simple unittests of set and get state

Author: m3nax

examples/Actor/DemoActor.UnitTest/UnitTest1.cs

@@ -1,11 +1,91 @@
+using Dapr.Actors.Runtime;
+using DaprDemoActor;
+using IDemoActorInterface;
+using Moq;
+
 namespace DemoActor.UnitTest
 {
-    public class UnitTest1
+    public class DemoActorTests
     {
         [Fact]
-        public void Test1()
+        public async Task SaveData_CorrectlyPersistDataWithGiveTTL()
+        {
+            // arrange
+            // Name of the state to be saved in the actor
+            var actorStateName = "my_data";
+            // Create a mock actor state manager to simulate the actor state
+            var mockStateManager = new Mock<IActorStateManager>(MockBehavior.Strict);
+            // Prepare other dependencies
+            var bankService = new BankService();
+            // Create an actor host for testing
+            var host = ActorHost.CreateForTest<DaprDemoActor.DemoActor>();
+            // Create an actor instance with the mock state manager and its dependencies
+            var storageActor = new DaprDemoActor.DemoActor(host, bankService, mockStateManager.Object);
+            // Prepare test data to be saved
+            var data = new MyDataWithTTL
+            {
+                MyData = new MyData
+                {
+                    PropertyA = "PropA",
+                    PropertyB = "PropB",
+                },
+                TTL = TimeSpan.FromSeconds(10)
+            };
+            // Setup the mock state manager to enable the actor to save the state with the SetStateAsync method, and return
+            //   a completed task when the state is saved, so that the actor can continue with the test.
+            // When MockBehavior.Strict is used, the test will fail if the actor does not call SetStateAsync or 
+            //   calls other methods on the state manager.
+            mockStateManager
+                .Setup(x => x.SetStateAsync(It.IsAny<string>(), It.IsAny<MyData>(), It.IsAny<TimeSpan>(), It.IsAny<CancellationToken>()))
+                .Returns(Task.CompletedTask);
+
+            // act
+            await storageActor.SaveData(data);
+
+            // assert
+            // Verify that the state manager is called with the correct state name and data, only one time.
+            mockStateManager.Verify(x => x.SetStateAsync(
+                actorStateName,
+                It.Is<MyData>(x => x.PropertyA == "PropA" && x.PropertyB == "PropB"),
+                It.Is<TimeSpan>(x => x.TotalSeconds == 10),
+                It.IsAny<CancellationToken>()),
+                Times.Once);
+        }
+
+        [Fact]
+        public async Task GetData_CorrectlyRetrieveData()
         {
+            // arrange
+            // Name of the state to be saved in the actor
+            var actorStateName = "my_data";
+            // Create a mock actor state manager to simulate the actor state
+            var mockStateManager = new Mock<IActorStateManager>(MockBehavior.Strict);
+            // Prepare other dependencies
+            var bankService = new BankService();
+            // Create an actor host for testing
+            var host = ActorHost.CreateForTest<DaprDemoActor.DemoActor>();
+            // Create an actor instance with the mock state manager and its dependencies
+            var storageActor = new DaprDemoActor.DemoActor(host, bankService, mockStateManager.Object);
+            // Prepare prepare the state to be returned by the state manager
+            var state = new MyData
+            {
+                PropertyA = "PropA",
+                PropertyB = "PropB",
+            };
+            // Setup the mock state manager to return the state when the actor calls GetStateAsync.
+            mockStateManager
+                .Setup(x => x.GetStateAsync<MyData>(actorStateName, It.IsAny<CancellationToken>()))
+                .Returns(Task.FromResult(state));
+
+            // act
+            var result = await storageActor.GetData();
 
+            // assert
+            // Verify that the state manager is called with the correct state name, only one time.
+            mockStateManager.Verify(x => x.GetStateAsync<MyData>(actorStateName, It.IsAny<CancellationToken>()), Times.Once);
+            // Verify that the actor returns the correct data.
+            Assert.Equal("PropA", result.PropertyA);
+            Assert.Equal("PropB", result.PropertyB);
         }
     }
-}
+}